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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
21

Avaliação Mecânica e Microestrutural da liga de alumínio AA3104 empregada na indústria de fabricação de latas laminada à frio com e sem interpasses /

Calçada, Maurício Vieira. January 2018 (has links)
Orientador: Marcelo dos Santos Pereira / Banca: Ana Paula Rosifini Alves Claro / Banca: Rafael Humberto Mota de Siqueira / Resumo: Os fabricantes de latas vêm se tornando cada vez mais exigentes na qualidade e propriedades dos materiais utilizados na confecção de seus produtos. Um dos metais mais usados na indústria de manufatura de componentes obtidos através de estampagem e estiramento, como na fabricação de corpo de latas de bebidas, trata-se da liga de Alumínio AA3104. Isto se deve às suas propriedades mecânicas, estampabilidade, entre outra. Ela pertence ao grupo 3XXX, sendo que seu principal elemento de liga é o manganês (em pequenas quantidades / teores). Trata-se de uma liga não tratável termicamente, sendo que suas propriedades mecânicas são melhoradas a partir da formação de solução sólida e / ou deformação à frio. Desta forma, o presente estudo teve como objetivo avaliar de maneira detalhada a influência de duas diferentes condições de laminação à frio sobre o comportamento mecânico e microestrutural da liga de Alumínio AA3104: laminação à frio com tempo de resfriamento intermediário e sem tempo de resfriamento intermediário entre passes. A análise mecânica, por meio do Ensaio de Tração, mostrou que os materiais laminados com tempo de resfriamento intermediário obtiveram maiores valores de Limite de Escoamento (283,1 MPa) e Limite de Resistência a Tração (309,3 MPa) do que aqueles materiais laminados sem este tempo de resfriamento intermediário (273,2 e 300,0 MPa, respectivamente). Isto foi justificado pelo aumento da quantidade de partículas de segunda fase precipitados na matriz da liga, que... (Resumo completo, clicar acesso eletrônico abaixo) / Abstract: The manufacturers of cans have become increasingly demanding in quality and in the properties of the materials used to make their products. One of the most used metals in the manufacturing industry of components obtained by stamping, as in the manufacture of beverage cans body, is the AA3104 Alloy. This is due to its mechanical properties, stampatability, among others. It belongs to the 3XXX group, and its main alloying element is manganese (in small amounts / contents). It is an alloy not thermally treatable, where its mechanical properties are improved from the formation of solid solution and / or cold forming. Therefore, the present study had as objective to evaluate in detail the influence of two different conditions of cold rolling on the mechanical and microstructural behavior of the aluminum alloy AA3104: cold rolling with intermediate cooling time and without intermediate cooling time between passes. The mechanical analysis, through the Tensile Test, showed that rolled materials with intermediate cooling time obtained higher values of Yield Strength (283,1 MPa) and Ultimate Tensile Strength (309,3 MPa) than those laminated materials without this intermediate cooling time (273,2 and 300,0 MPa, respectively). This was justified by the increase in the amount of second phase particles and precipitated dispersions in the alloy matrix, which made difficult the movement of dislocations, making the material more resistant / Mestre
22

Simulation of thermo-mechanical deformation in high speed rolling of long steel products

Biswas, Souvik. January 2003 (has links)
Thesis (M.S.)--Worcester Polytechnic Institute. / Keywords: product geometry; hot rolling; high speed rolling; rolling simulation; bar and rod rolling; free surface; finite element analysis. Includes bibliographical references (p. 69-75).
23

Virtual Material Processing (VMP) on the World Wide Web (WWW) cold rolling.

Banga, Rajneesh. January 2000 (has links)
Thesis (M.S.)--Ohio University, June, 2000. / Title from PDF t.p.
24

A finite element method for ring rolling processes

Dewasurendra, Lohitha. January 1998 (has links)
Thesis (Ph. D.)--Ohio University, June, 1998. / Title from PDF t.p.
25

An analysis, design, and improvement methodology for shape rolling processes and procedures for the compensation of dies

Belinski, Robert A. January 1999 (has links)
Thesis (Ph. D.)--Ohio University, June, 1999. / Title from PDF t.p.
26

Optimization of shape rolling processes using finite element analysis and experimental design methodology

Osio, Ignacio G. January 1992 (has links)
Thesis (M.S.)--Ohio University, June, 1992. / Title from PDF t.p.
27

An upper bound method of solution for the pack rolling process and software integration of PACK 1.5

Anbajagane, Rathinavel. January 1993 (has links)
Thesis (M.S.)--Ohio University, August, 1993. / Title from PDF t.p.
28

Development of a practical software tool for the design of rolls for near net shape profile rolling

Fischer, Christian E. January 1994 (has links)
Thesis (M.S.)--Ohio University, March, 1994. / Title from PDF t.p.
29

A study on wear and surface roughness of work roll in cold rolling

Li, Hongchun. January 2008 (has links)
Thesis (Ph.D.)--University of Wollongong, 2008. / Typescript. Includes bibliographical references: leaf 166-180.
30

Computer modeling of complex metal forming processes using the upper bound elemental technique (UBET) and modified upper bound elemental techniqeu (MUBET) /

Al-Mohaileb, Mazyad M. January 2004 (has links)
Thesis (Ph. D.)--Ohio University, March, 2004. / Includes bibliographical references (leaves 140-148).

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