Thesis (M.C.E.)--University of Delaware, 2007. / Principal faculty advisor: Daniel K. Cha, Dept. of Civil & Environmental Engineering. Includes bibliographical references.

Thesis (Ph. D.) University of Missouri-Columbia, 2006. / The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file (viewed on August 1, 2007) Includes bibliographical references.

"A Private Edition Distributed by the University of Chicago Libraries." Thesis (Ph. D.)--University of Chicago, 1917. / "Reprinted from the Physical review, n.s., vol. VIII, no. 5, November, 1917." Includes bibliographical references. Also available on the Internet.

Thesis (Ph. D.)--Washington State University, August 2007. / Includes bibliographical references (p. 113-118).

Thesis (M.S.)--West Virginia University, 2007. / Title from document title page. Document formatted into pages; contains xii, 59 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 53-59).

Thesis (PH. D.)--University of Chicago, 1921. / "Private edition, distributed by the University of Chicago Libraries, Chicago, Illinois." "Reprinted from the American journal of physiology, vol. 50, no. 3, Dec., 1919; vol. 61, no. 3, Aug., 1922; and vol. 63, no. 2, Jan. 1923." Bibliography: p. 442, 500, 357. Also available on the Internet.

Thesis (Ph. D.)--University of Texas at Austin, 1999. / Vita. Includes bibliographical references (leaves 151-153). Available also in a digital version from Dissertation Abstracts.

Thesis (Ph. D.)--University of Washington, 2000. / Vita. Includes bibliographical references (leaves 170-184).

Thesis (M.Ch.E.)--University of Delaware, 2008. / Principal faculty advisor: Douglas J. Buttrey, Dept. of Chemical Engineering. Includes bibliographical references.

Made available in DSpace on 2014-06-11T19:27:11Z (GMT). No. of bitstreams: 0 Previous issue date: 2010-12-14Bitstream added on 2014-06-13T20:35:17Z : No. of bitstreams: 1 leite_mp_me_guara.pdf: 5697159 bytes, checksum: 3d01e115bf6ba84fde15df65623ceef4 (MD5) / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) / Neste trabalho foi realizado o estudo da fragilização pelo hidrogênio em um tubo de aço API 5L X65 de alto grau de limpidez para uso em dutos de condução para aplicação em ambientes que contém gás sulfídrico. Ensaios normalizados foram realizados com o objetivo de caracterizar as propriedades do material em estudo, através de análise química, análise microestrutural, ensaios mecânicos - dureza, tração, impacto e drop weight (DWTT), ensaios de corrosão - ensaios de HIC e SSC - e ensaios eletroquímicos - curvas de polarização potenciodinâmica, voltametria cíclica e medições de corrente de permeação de hidrogênio. Os resultados apresentaram: a) microestrutura refinada predominante de ferrita acicular, b) caracterização mecânica com resultados dentro do especificado pela norma de fabricação, c) análise química e ensaios de corrosão com resultados superando os requisitos da norma de fabricação e d) nos ensaios eletroquímicos foi evidenciado que o aço em estudo apresentou uma baixa corrente de permeação e uma maior resistência à corrosão em meio de NaCl 3,5% em relação a um aço padrão. Os resultados indicam que o material em estudo atende os critérios da norma de fabricação do tubo (API 5L), sendo evidenciado que o mesmo é adequado para utilização ao ambiente que lhe é proposto / In this paper, it was carried out a study of a hydrogen embrittlement in a pipe API 5L X65 with high level of cleanness for linepipe used in sour service environment.. It was performed standardized testing in order to perform an assessment of the material properties, through the chemical analysis and microstructural analysis, mechanical tests – hardness, tensile, impact and drop weight tear test (DWTT), corrosion tests - HIC and SSC tests - and electrochemical tests - potentiodynamic polarization curves, cyclic voltammetry and hydrogen permeation current measurements. The results presented: a) refined microstructure predominant of acicular ferrite, b) mechanical characterization with results that fulfilled with the pipe fabrication standard, c) chemical analysis and corrosion tests with results exceeding the requirements of the standard and d) electrochemical tests showing the studied steel presenting a low permeation current and a higher corrosion resistance in a environment of NaCl 3,5% in relation of standard steel. The results indicate that the studied material complies with the acceptance criteria of the pipe fabrication standard (API 5L), and it was evidenced that the material is suitable for use in sour service environment