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Flow Stress Behavior and Microstructure Evolution Anisotropy of Extruded 7075 Aluminum Alloy Bar at Elevated Temperatures Yongbiao Yanga, Zhimin ZHANGb, Qiangwangc College of Materials Science and Engineering, North University of China, Shanxi Province Taiyuan 030051, China ayangyongbiao@yahoo.cn, bzhangzhimin@nuc.edu,cn, cwangqiang@nuc.edu,cn Keywords: 7075 aluminum alloy; Yield strength; Lamellar grain structure; Equiaxed grain Abstract.
Introduction The 7xxx series aluminum alloys have been widely used as structural materials due to their attractive comprehensive properties, such as low density, high strength, ductility, toughness and resistance to fatigue 1-3.
Progress in structural materials for aerospace systems.
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In this article the main injection molding materials is PP.
Materials, process parameters and the grey system establishment.
Material is Generic Default PP which is selected from MPI material warehouse.
Corresponding author: NIE Wen-zhong, Email:niewzchen@163.com, Tel:86+13482282364 References [1] WANG Li-xia, YANG Yang , WANG Bei, SHEN Chang-y u, Investigation of the Influence of Processing Parameter on Volumetric Shrinkage Variation of Plastic Injection Molded parts and Process Optimization, Polymer Materials Science and Engineering, Vo l. 20, No . 2, M ar. 2004:173-176
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The relative intensity and the full width at half maximum (FWHM) for G band are often used to determine the crystalline perfection and phase purity of nanostructured materials [8].
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The sine shear strain is applied to materials by dynamical shear test (small amplitude oscillation).And stress is determined as a dynamic response.
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Introduction It will take a greater risk to construction arch bridge, except the materials development in the long-span arch bridge construction, the most critical problem is the construction technical problems.
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