Made available in DSpace on 2016-06-02T20:16:54Z (GMT). No. of bitstreams: 1 6698.pdf: 13275782 bytes, checksum: 2c4bbd5a5c838552f7cbf82ce709e116 (MD5) Previous issue date: 2015-03-09 / Financiadora de Estudos e Projetos / In this work, the lead-free ceramic powders of xBi0,5Na0,5TiO3 - (0,7186 - 0,7143x) Bi0,5K0,5TiO3 - (2814 - 2857x) BaTiO with x = 0,8200; 0,8625; 0,8792, 0,9126 and 0,9300 (BNBK1000x) were prepared by the solid state reaction method, followed by conventional densification. The ceramic bodies showed high density, which was higher than 95% in obtained samples. For the all ceramics were performed structural, micro structural, electric and anelastic characterizations. The X-ray diffraction (XRD) analysis indicated the formation of the complex perovskite type crystaline structure for all compositions analyzed without the presence of spurious phases. By the structural refinement by the Rietveld method of XRD data and by Raman spectroscopy were observed that for BNBK912 and BNBK930 compositions, at room temperature, the predominant symmetry is rhombohedral (R3c), while the BNBK820 composition exhibits a tetragonal crystalline symmetry (P4mm). For the BNBK879 and BNBK826 compositions presented a mixture of phases, possibly with rhombohedral and tetragonal symmetry, reaveling the morphotropic phase boundary (MPB) of this system. The microstructure of BNBK1000x ceramics was investigated by scanning electron microscopy (SEM), where the morphology grains with irregular sizes and shapes, where the increased levels of K+ and Ba2+ ions suppressed the growth of the grains. The characterizations by Raman spectroscopy at room temperature showed broad Raman modes, due to the chemical and/or structural disorder related to the substitution of elements Bi and Na for Ba and K. The ferroelectric characterizations at room temperature of the BNBK1000x ceramics showed that all compositions studied are ferroelectric. Through the comparison among the measurements of electrical impedance and mechanical spectroscopy, was possible to identify the different structural and electric phase transitions that were employed in the construction of a pseudodiagram of phases for the BNBK1000x compositions. / Neste trabalho, os pós-cerâmicos livres de chumbo xBi0,5Na0,5TiO3 - (0,7186 - 0,7143x) Bi0,5K0,5TiO3 - (2814 - 2857x) BaTiO com x = 0,8200; 0,8625; 0,8792, 0,9126 e 0,9300 (BNBK1000x) foram obtidos através do método de reação de estado sólido, seguido por densificação convencional. Os corpos cerâmicos obtidos apresentaram elevada densificação, sendo maior que 95% nas amostras produzidas. Para todas as cerâmicas foram realizadas caracterizações estruturais, microestruturais, elétricas e anelásticas. As análises por difração de raios-X (DRX) indicaram a formação da estrutura cristalina tipo perovkista complexa para todas as composições analisadas, sem a presença de fases espúrias. O refinamento estrutural, pelo método de Rietveld, dos resultados de DRX e os resultados de espectroscopia Raman apontam que para as composições BNBK930 e BNBK912 a simetria predominante em temperatura ambiente é romboédrica (R3c), enquanto que a composição BNBK820 apresenta a simetria cristalina tetragonal (P4mm). Já as composições BNBK879 e BNBK862 apresentaram uma mistura de fases, possivelmente com simetrias romboédrica e tetragonal, evidenciando o contorno de fase morfotrópico (CFM) deste sistema. A microestrutura das cerâmicas de BNBK1000x foi investigada por microscopia eletrônica de varredura (MEV), onde a morfologia apresentada pelas diferentes composições estudadas possuíam grãos com tamanhos e formatos irregulares, sendo que o aumento dos teores dos íons de K+ e Ba2+ inibiram o crescimento dos grãos. A caracterização por espectroscopia Raman, em temperatura ambiente, apresentou modos Raman amplos, mostrando um elevado grau de desordem química e/ou estrutural devido à substituição dos elementos Bi e Na por Ba e K. As caracterizações ferroelétricas, também em temperatura ambiente das cerâmicas de BNBK1000x mostraram que todas as composições estudadas possuem propriedades ferroelétricas. Através da comparação entre as medidas de impedância elétrica e anelástica, levando em consideração as caracterizações estruturais e ferroelétricas com temperatura, foi possível identificar diferentes transições de fase estruturais e elétricas, que foram empregadas na construção de um pseudo-diagrama de fases para as composições de BNBKx.

Made available in DSpace on 2016-06-02T20:19:24Z (GMT). No. of bitstreams: 1 6248.pdf: 27691207 bytes, checksum: cc929611cc4e506743fb3b9ce1730858 (MD5) Previous issue date: 2014-08-07 / Universidade Federal de Sao Carlos / Motivated by the great growth presented in the last decade in research on lead-free piezoelectric ceramics and the fact that some ceramic systems, as those based on bismuth, have been identified as promising candidates to substitute the lead zirconate titanate (PZT) in their present technological applications, was proposed as the objective of this work, study the effect of adding 𝐵𝑎𝑇 𝑖𝑂3 (BT) on the structural, electrical and anelastic properties exhibit by the system (1−𝑥)𝐵𝑖0.5𝑁𝑎0.5𝑇𝑖𝑂3−𝑥𝐵𝑎𝑇 𝑖𝑂3 (BNT-BT). The structural characterization was performed by the techniques of X-ray diffraction (XRD) and Raman spectroscopy. The morphological and compositional aspects (qualitative), in the calcined powders, and the sintered samples were studied by scanning electron microscopy (SEM). The ferroelectric and dielectric character of the compositions were obtained through characterization of ferroelectric hysteresis exhibit and using the technique of electrical impedance spectroscopy, respectively. Phase transitions and the possible mechanisms of anelastic relaxation were studied by the technique of mechanical spectroscopy. Samples were obtained by the method of solid state reaction, where it was possible to obtain compositions with 0.00 ≤ 𝑥 ≤ 0.08 with relative density greater than 95% and without the presence of spurious or secondary phases. On profiles of X-ray diffraction for the different studied sintered compositions was applied the method of Rietvelt refinement which allow the determination and confirmation of the crystal structures in the samples under study, and the presence of a morphotropic phase boundary (MPB) for the BNT-BT. The XRD results were corroborated by the results of Raman spectroscopy. The ferroelectric nature of the different compositions of BNT-BT system studied was confirmed. Electrical phase transitions (F-Af and Af-P) and structural transitions (R-T and T-C) exhibited by the BNT-BT were characterized by mechanical spectroscopy (using a dynamical mechanical analyzer (DMA)), and by electrical impedance spectroscopy, employing the results in complementing the electrical and structural phase diagram of this system. In addition to the phase transitions obtained, the technique of mechanical spectroscopy for compositions between 0.00 ≤ 𝑥 ≤ 0.03, allowed the observation of a complex process of anelastic relaxation that was associated with interactions and mobility of different defects present, which possibly contribute significantly to an increase of conductivity in these materials, which had not been previously reported in the literature. / Motivados pelo grande crescimento apresentado na última década nas pesquisas em cerâmicas piezoelétricas livres de chumbo e o fato de alguns sistemas cerâmicos, como os baseados em bismuto, já terem sido identificados como promissores candidatos à substituição do titanato zirconato de chumbo (PZT) em suas atuais aplicações tecnológicas, foi proposto como objetivo deste trabalho, estudar a influência da adição de 𝐵𝑎𝑇 𝑖𝑂3 (BT) sobre as propriedades estruturais, elétricas e anelásticas exibidas pelo sistema (1 − 𝑥)𝐵𝑖0,5𝑁𝑎0,5𝑇𝑖𝑂3 − 𝑥𝐵𝑎𝑇 𝑖𝑂3 (BNT-BT). A caracterização estrutural foi realizada por meio das técnicas de difração de raios-X (DRX) e espectroscopia Raman. Os aspectos morfológico e composicional (qualitativo), tanto dos pós calcinados, quanto das amostras sinterizadas foram estudados mediante microscopia eletrônica de varredura (MEV). O caráter ferroelétrico e dielétrico das composições estudadas foram obtidos por meio da caracterização da histerese ferroelétrica exibida e da técnica de espectroscopia de impedância elétrica, respectivamente. As transições de fase e os possíveis mecanismos de relaxação anelástica foram estudados utilizando a técnica de espectroscopia mecânica. As amostras foram obtidas pelo método de reação de estado sólido, onde foi possível obter composições com 0, 00 ≤ 𝑥 ≤ 0, 08 com densidades relativas maiores que 95% e sem a presença de fases espúrias ou secundárias. Aos perfis de difração de raios-X para as diferentes composições sinterizadas estudadas foi aplicado o método de refinamento Rietvelt que permitiu a determinação e confirmação das estruturas cristalinas nas amostras em estudo, além da presença de contorno de fase morfotrópico (CFM) para o BNT-BT. Os resultados de DRX foram corroborados por meio dos resultados de espectroscopia Raman. O carácter ferroelétrico das diferentes composições do sistema BNT-BT estudadas foi confirmado. Tanto as transições de fase elétricas, ferroelétricaantiferroelétrica (F-Af) e antiferroelétrica-paraelétrica (Af-P), quanto as transições estruturais, romboédrica-tetragonal (R-T) e tetragonal-cubica (T-C), exibidas pelo BNT-BT foram caracterizadas por espectroscopia mecânica (por meio de um analisador dinâmico mecânico(DMA)) e por espectroscopia de impedância elétrica, empregando-se os resultados obtidos na complementação do diagrama de fase elétrico e estrutural deste sistema. Além das transições de fase obtidas, a técnica de espectroscopia mecânica, para composições entre 0, 00 ≤ 𝑥 ≤ 0, 03, propiciou a observação de um processo de relaxação anelástica complexo que foi associado a interações e mobilidade de diferentes defeitos presentes, que possivelmente contribuem significativamente para um aumento de condutividade nestes materiais, que não haviam sido reportado anteriormente na literatura.

Made available in DSpace on 2015-05-14T12:39:43Z (GMT). No. of bitstreams: 1 ArquivoTotal.pdf: 1020314 bytes, checksum: 537a5807209898a911ce64ccd9765244 (MD5) Previous issue date: 2013-03-18 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES / This research aims to investigate and develop a semiotic study about the dialogical interactions between the theatre and the song systems in the play Gota D Água (1975) written by Chico Buarque and Paulo Pontes. To achieve this purpose will be required a combination of theories from the Semiotics of Culture, the dramatic language and the song, emphasizing the studies on Brazilian Popular Music (MPB). Thus, we intend to create an inter-semiotic dialogue between the theatre and the song, considering them as two structural semiotic languages to the understanding of the play Gota D Água. In this study, both dramatic language and the song (MPB) language will be considered as a second-degree modelling system, once they convey their own meaning and have singular codifications in relation to the natural language, the first-degree modelling system. Through the establishment of this semiotic network, we hope contribute to the increasing of the systemic communication network of culture itself. / Esta pesquisa visa investigar e desenvolver um estudo semiótico entre os sistemas de linguagens dialogantes da canção e do texto dramático na obra Gota D Água (1975), de Chico Buarque e Paulo Pontes. Para a concretização deste exercício de modelização, utilizar-se-á como lastro teórico os conceitos da Semiótica da Cultura somados aos estudos acerca da linguagem dramática e da canção, com enfoque na Música Popular Brasileira (MPB). Através deste respaldo conceitual, pretende-se tecer um diálogo intersemiótico entre o teatro e a canção, duas linguagens que consideramos estruturais do ponto de vista do significado da peça. Nesta pesquisa, tanto a canção popular, quanto o texto dramático serão considerados sistemas modelizantes de segundo grau uma vez que transmitem significados próprios e também por possuírem codificações singulares em relação à língua natural que é o sistema modelizante de primeiro grau. Por fim, espera-se, através das construções de sentido geradas a partir desta interação semiótica, estarmos contribuindo para a ampliação da rede de comunicação sistêmica da cultura.

No description available.

Thesis (PhD(Agric))--Stellenbosch University, 2012. / ENGLISH ABSTRACT: The energy paradigm shift from fossil fuels to renewable energy sources is driven, among others, by a growing sustainability awareness, necessitating more sophisticated measurements in terms of a wider range of criteria. Technical efficiency, financial profitability, environmental friendliness and social acceptance are some of the factors determining the sustainability of renewable energy systems. The resulting complexity and conflicting decision criteria, however, constitute major barriers to processing the information and decision-making based on the information. Seeking to implement local bioenergy systems, policymakers of the Cape Winelands District Municipality (CWDM), South Africa, are confronted with such a problem. Following a case study approach, this study illustrates how life-cycle assessment (LCA), multi-period budgeting (MPB) and geographic information systems (GIS) can aid the decision-making process by providing financial-economic, socio-economic and environmental friendliness performance data in a structured and transparent manner, allowing for a comparison of the magnitude of each considered criterion along the life-cycle. However, as the environmental impacts cannot readily be expressed in monetary terms on a cardinal scale, these considerations are given less attention or are omitted completely in a market economy. By measuring the various considerations on an ordinal scale and by attaching weights to them using the multi-criteria decision analysis (MCDA) approach, this study, illustrates how to internalise externalities as typical market failures, aiding policymakers of the CWDM to choose the most sustainable bioenergy system. Following the LCA approach, 37 lignocellulosic bioenergy systems, encompassing different combinations of type of harvesting and primary transport, type of pretreatment (comminution, drying, and fast pyrolysis) and location thereof (roadside or landing of the central conversion plant), type of secondary transport from the roadside to the central conversion plant, and type of biomass upgrading and conversion into electricity, were assessed against five financial-economic viability criteria, three socio-economic potential criteria and five environmental impact criteria. The quantitative performance data were then, as part of the MCDA process, translated into a standardised ‘common language’ of relative performance. An expert group attached weights to the considered criteria using the analytical hierarchy process (AHP). The ‘financial-economic viability’ main criterion received a weight of almost 60%, ‘socio-economic potential’, nearly 25% and ‘lowest environmental impact’, the remainder of around 16%. Taking the prerequisite of financial-economic viability into consideration, the preferred option across all areas of the CWDM (despite various levels of productivity) comprises a feller-buncher for harvesting, a forwarder for primary transportation, mobile comminution at the roadside, secondary transport in truck-container-trailer combinations and an integrated gasification system for the conversion into electricity. / AFRIKAANSE OPSOMMING: Die energie paradigma verandering van fossielbrandstowwe na hernubare energiebronne word gedryf deur ‘n groeiende klem op volhoubaarheid, wat ook meer gesofistikeerde meting in terme van ‘n wyer verskeidenheid maatstawwe vereis. Tegniese doeltreffendheid, finansiële winsgewendheid, omgewingsvriendelikheid en sosiale aanvaarbaarheid is sommige van die faktore wat die volhoubaarheid van hernubare energie stelsels bepaal. Die verskeidenheid oorwegings bring egter kompleksiteit en konflik mee by die verwerking van inligting en die besluitneming wat daarop berus. Beleidmakers van die Kaapse Wynland Distriksmunisipaliteit wat ten doel het om plaaslik bio-energie stelsels te implementeer, word met hierdie probleem gekonfronteer. Hierdie ondersoek illustreer aan die hand van ‘n gevallestudie benadering hoe lewensiklus analise, multiperiode begroting en geografiese inligtingstelsels besluitneming kan ondersteun deur die voorsiening van finansieel-ekonomiese, sosio-ekonomiese (indiensneming) en omgewingsvriendelikheid prestasie data op ‘n gestruktureerde en deursigtige wyse. Dit maak die vergelyking van die waardes van al die kriteria by elke fase van die lewensiklus moontlik. Aangesien die omgewingseffekte nie geredelik in monetêre terme op ‘n kardinale skaal gemeet kan word nie, kry hulle binne die markekonomie minder aandag of word selfs buite rekening gelaat. Deur hierdie verskeidenheid kriteria op ‘n ordinale skaal te meet en gewigte met behulp van multikriteria besluitneming aan hulle toe te ken, toon hierdie ondersoek hoe om eksternaliteite as tipiese markmislukkings te internaliseer om beleidmakers van die Kaapse Wynland Distriksmunisipaliteit in staat te stel om die mees volhoubare bio-energie stelsel te kies. Met behulp van lewensiklus analise is 37 lignosellulose bio-energie stelsels geïdentifiseer as verskillende kombinasies van oes van die bome, primêre vervoer van houtstompe, vooraf verwerking (verspaandering, droging, vinnige pirolise), die ligging van hierdie aktiwiteite (langs ‘n plantasie of by ‘n sentrale omsettingsaanleg), tipe sekondêre vervoer van houtspaanders vanaf die plantasie na die sentrale omsettingsaanleg en tipe biomassa opgradering en omsetting van die houtspaanders na elektrisiteit. Die verskillende stelsels is gemeet aan die hand van vyf finansieel-ekonomiese kriteria, drie indiensneming potensiaal kriteria en vyf omgewingsimpak kriteria. Die kwantitatiewe metings is deur middel van multikriteria besluitneming omgeskakel na ’n gestandaardiseerde “gemeenskaplike taal” van relatiewe prestasie. Lede van ‘n ekspertgroep het gewigte is aan die onderskeie kriteria met behulp van die analitiese hierargie proses toegeken. Aan die finansieel-ekonomiese lewensvatbaarheid hoof kriterium is ‘n gewig van by die 60% toegeken, aan die indiensnemingspotensiaal bykans 25% en aan omgewingsvriendelikheid sowat 16%. Die voorkeur kombinasie vir al die areas van die Kaapse Wynland Distriksmunisipaliteit sluit in ‘n saag-bondelaar vir die oesproses, ‘n plantasie-vragmotor vir primêre vervoer, mobiele verspaandering langs die plantasie, ‘n vragmotor-skeepshouer-treiler kombinasies vir die sekondêre vervoer van houtspaanders en ‘n geïntegreerde vergassingstelsel vir die omsetting van houtspaanders na elektrisiteit.

Made available in DSpace on 2016-04-25T20:23:10Z (GMT). No. of bitstreams: 1 Maria de Fatima Vicente.pdf: 931895 bytes, checksum: 411623fa873351963074ca75769e9ffa (MD5) Previous issue date: 2010-06-09 / This thesis deals with the social symptom Brazilian popular Music - MPB between 1965 and 1972 and its ethical incidence on the Brazilian society under dictatorship (1964-1985) as effect of its condition of social symptom. The sonority is a central element of the Brazilian society and instituted itself in earthly, corporal sonority, opposite to the sublime one. In the turn of century XIX, by the force of the conditions of the musical scene and the social-political scene, it was articulated based on the orality and for the percussion when, stabilished the frame song as the predominant way of the Brazilian musical culture. It points out as intrinsic factor to the definition of this frame the insurmountable presence of the singer, decisive element for the effect of symbolic mediation of the social link accomplished by this music, in special when the institutionalization of the MPB. The format song safeguarded the place of the body, as the frame supports itself the intonation of everyday speach, and instaurates the body of the singer as object of the circulation of the word, diction limited for the interdiction. Which alows to point out the acts of the singers as singular acts due to relation in this social symptom that the singer establishes with his public: situated in the lack of the object by the effect of musical silence, homologous position to the psychoanalyst in the cure, producing decoposed and understandable effects of the social reality. It was concluded that the vicissitudes of social MPB symptom in that social-political conjuncture, read by the paradigm of singer s interpretation , had happened in the society as acts that drive away the death and had accomplished understandable possibilities of the instituted social-political order / Esta tese trata do sintoma social Música popular brasileira MPB entre 1965 e 1972 e de sua incidência ética sobre a sociedade brasileira sob ditadura (1964-1985) como efeito de sua condição de sintoma social. A sonoridade é um elemento central da sociedade brasileira e se instituiu em sonoridade terrena, corpórea e avessa ao sublime. Na virada do século XIX, por força das condições da cena musical e da cena político-social, articulou-se pautada pela oralidade e pela percussão quando, estabilizou o formato canção como o modo predominante da cultura musical brasileira. Sobressai como fator intrínseco à definição desse formato a presença incontornável do cancionista, elemento decisivo para os efeitos de mediação simbólica do laço social efetivado por essa música, em especial quando da institucionalização da MPB. O formato-canção salvaguardou o lugar do corpo, uma vez que esse formato se apóia na entoação da fala cotidiana, e instaura o corpo do cancionista como objeto da circulação da palavra, dicção limitada pela interdicção. O que permite situar os atos dos cancionistas como atos singulares devido à relação que nesse sintoma social o cancionista estabelece com seu público: situado na falta do objeto por efeito do silêncio musical, posição homóloga à do psicanalista na cura, produzindo efeitos de escansão interpretantes da realidade social. Conclui-se que as vicissitudes do sintoma social MPB naquela conjuntura político-social, lidos pelo paradigma da interpretação do cancionista, incidiram na sociedade como atos que afugentam a morte e efetivaram possibilidades interpretantes da ordem político-social instituída

Made available in DSpace on 2016-04-26T14:58:09Z (GMT). No. of bitstreams: 1 Maria de Fatima Vicente.pdf: 931895 bytes, checksum: 411623fa873351963074ca75769e9ffa (MD5) Previous issue date: 2010-06-09 / This thesis deals with the social symptom Brazilian popular Music - MPB between 1965 and 1972 and its ethical incidence on the Brazilian society under dictatorship (1964-1985) as effect of its condition of social symptom. The sonority is a central element of the Brazilian society and instituted itself in earthly, corporal sonority, opposite to the sublime one. In the turn of century XIX, by the force of the conditions of the musical scene and the social-political scene, it was articulated based on the orality and for the percussion when, stabilished the frame song as the predominant way of the Brazilian musical culture. It points out as intrinsic factor to the definition of this frame the insurmountable presence of the singer, decisive element for the effect of symbolic mediation of the social link accomplished by this music, in special when the institutionalization of the MPB. The format song safeguarded the place of the body, as the frame supports itself the intonation of everyday speach, and instaurates the body of the singer as object of the circulation of the word, diction limited for the interdiction. Which alows to point out the acts of the singers as singular acts due to relation in this social symptom that the singer establishes with his public: situated in the lack of the object by the effect of musical silence, homologous position to the psychoanalyst in the cure, producing decoposed and understandable effects of the social reality. It was concluded that the vicissitudes of social MPB symptom in that social-political conjuncture, read by the paradigm of singer s interpretation , had happened in the society as acts that drive away the death and had accomplished understandable possibilities of the instituted social-political order / Esta tese trata do sintoma social Música popular brasileira MPB entre 1965 e 1972 e de sua incidência ética sobre a sociedade brasileira sob ditadura (1964-1985) como efeito de sua condição de sintoma social. A sonoridade é um elemento central da sociedade brasileira e se instituiu em sonoridade terrena, corpórea e avessa ao sublime. Na virada do século XIX, por força das condições da cena musical e da cena político-social, articulou-se pautada pela oralidade e pela percussão quando, estabilizou o formato canção como o modo predominante da cultura musical brasileira. Sobressai como fator intrínseco à definição desse formato a presença incontornável do cancionista, elemento decisivo para os efeitos de mediação simbólica do laço social efetivado por essa música, em especial quando da institucionalização da MPB. O formato-canção salvaguardou o lugar do corpo, uma vez que esse formato se apóia na entoação da fala cotidiana, e instaura o corpo do cancionista como objeto da circulação da palavra, dicção limitada pela interdicção. O que permite situar os atos dos cancionistas como atos singulares devido à relação que nesse sintoma social o cancionista estabelece com seu público: situado na falta do objeto por efeito do silêncio musical, posição homóloga à do psicanalista na cura, produzindo efeitos de escansão interpretantes da realidade social. Conclui-se que as vicissitudes do sintoma social MPB naquela conjuntura político-social, lidos pelo paradigma da interpretação do cancionista, incidiram na sociedade como atos que afugentam a morte e efetivaram possibilidades interpretantes da ordem político-social instituída

Microstructure and micro-mechanical characterization of as-built and heat-treated samples of Hastelloy X produced by laser powder bed fusion (LPBF) process has been carried out in this study. As-built LPBF blocks were solution heat-treated at 1177°C and 1220°C followed by fast cooling. The microstructure of as-built and heat-treated samples were studied by light optical microscopy, scanning electron microscopy, and electron backscatter diffraction. Instrumented indentation micro Vickers testing was performed to obtain microhardness and elastic modulus of asbuilt and heat-treated samples. Microtensile samples from as-built and heat-treated blocks were prepared and polished for mechanical characterization. Microtensile testing inside the scanning electron microscope was performed to evaluate the mechanical properties and to get information about the microstructural changes during plastic deformation. Microstructure characterization revealed disrupted epitaxial grain growth for the as-built samples whereas the two heated-treated Hastelloy X samples exhibited equiaxed grains with varying twin fractions. As-built Hastelloy X samples exhibited higher mean hardness than heat-treated samples. The yield strength of as-built samples reveals higher values as compared to conventional wrought Hastelloy X samples, whereas lower yield strength and higher elongation were observed for heat-treated samples as compared to as-built samples. Higher elongation and lower yield strength values were observed for the samples solution heat-treated at 1220°C compared to the solution heat-treated at 1177°C. Microstructural evaluation at different plastic strains during in-situ microtensile testing reveals a clear difference in dislocation density for as-built and heat-treated samples.