AZ31B镁合金板材进行重复单向弯曲过程的冷冲压成形性外文文献翻译、中英文翻译.doc

Cold stamping formability of AZ31B magnesium alloy sheet undergoing repeated unidirectional bending process Lei Zhanga,b, Guangsheng Huanga,b, * , Hua Zhanga,b , Bo Song a,b a National Engineering Research Center for Magnesium Alloys, Chongqing University, Chongqing 400030, China b College of Material Science and Engineering, Chongqing University, Chongqing 400030, China ---------------------------------------------------------------- a r t i c l e i n f o ---------------------------------------- Article history: Received 11 April 2010 Received in revised form 7 November 2010 Accepted 28 November 2010 Available online 7 December 2010 ------------------------------------------------- a b s t r a c t -------------------------------------------- The repeated unidirectional bending (RUB) process was carried out on an AZ31B magnesium alloy in order to investigate its effects on the cold stamping formability. The limiting drawing ratio (LDR) of the RUB processed magnesium alloy sheet with an inclination of basal pole in the rolling direction can reach 1.5 at room temperature. It was also con?rmed that cell phone housings can be stamped successfully in crank press using the RUB processed AZ31B magnesium alloy sheet. The improvement of the stamping formability at room temperature can be attributed to the texture modi?cations, which led to a lower yield strength, a larger fracture elongation, a smaller Lankford value (r-value) and a larger strain hardening exponent (n-value). ? 2010 Elsevier B.V. All rights reserved. Keywords: Magnesium alloy sheet;RUB;Texture;Stamping formability； Cell phone housing 1. Introduction Nowadays, the products of magnesium alloys, mainly formed by casting and die-casting, are used in the aerospace, automobile, civilian household appliances. Compared with casting and die-casting, plastic forming technology seems to be more attractive because of its competitive productivity and performance. Among the fabrication processes of plastic forming, sta