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Effect of process parameters of cross wedge rolling on the internal rarefaction

CHEN Su-ying~1,ZHANG Kang-sheng~1,YANG Cui-ping~1,HU Zheng-huan~1,GAO Xi-yin~2(1.School of Engineering,University of Science &Technology Beijing,Beijing 100083,China;2.School of Engineering,Hebei Agriculture University,Baoding Hebei 071001,China)  
The regression equation of internal rarefaction grades is acquired by processing the experimental data in the experiment of porous void by USTB,based on the mathematical theory of statistics.This equation fits obviously good by verification.By the extensive analysis of the regression equation,the mutual effect exits obviously between stretching angle and area reduction.The internal rarefaction appears while the small stretching angle and major area reduction are used in cross wedge rolling,or vice versa. On the other hand,the porous void is liable to emerge while the forming angle is small.This study provides a guideline for the rarefaction formation mechanism.
【Fund】: 国家自然科学基金项目(50435010)
【CateGory Index】: TG335
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