کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
798400 | 903253 | 2011 | 6 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Influence of initial texture on formability of AZ31B magnesium alloy sheets at different temperatures Influence of initial texture on formability of AZ31B magnesium alloy sheets at different temperatures](/preview/png/798400.png)
Repeated unidirectional bending (RUB) process was carried out to improve the texture of AZ31B magnesium alloy sheets. Influence of initial texture on formability of AZ31B magnesium alloy sheets at different temperatures was investigated. Compared with the as-received sheets, the limiting drawing ratio of the RUB processed sheets increased to 1.3 at room temperature, 1.5 at 50 °C and 1.7 at 100 °C, respectively. The improvement of the press formability at lower temperatures can be attributed to the texture modification, which led to a smaller Lankford value and a larger strain hardening exponent. However, the press formability of the sheet with a weakened basal texture has no advantage at higher temperature. This is due to much smaller r-value that results in severe thinning in thickness direction during the stamping process which is unfavorable to forming. Anyhow it is likely that the texture control has more effect on the press formability at lower temperature.
Journal: Journal of Materials Processing Technology - Volume 211, Issue 10, October 2011, Pages 1575–1580