Deep drawability and drawing behaviour of AZ31 alloy sheets with different initial texture
Deep drawability and drawing behaviour of AZ31 alloy sheets with different initial texture
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不同初始织构AZ31合金板的深拉深性能及拉深行为
DOI：
10.1016/j.jallcom.2014.06.199
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发表时间：
2014-12
影响因子：
6.2
通讯作者：
Hongbiao Dong
中科院分区：
文献类型：
--
作者：
Jianfeng Fan;Hans Jørgen Roven;Bingshe Xu;Hongbiao Dong
为改善AZ31合金板材的织构，采用反复单向弯曲(摩擦)工艺。与基面织构较强的板材相比，基面织构较弱的摩擦处理板材可以在较大的极限拉深比(LDR)为1.7的情况下成功拉深。对于两个拉伸杯形件，由于发生了伸展孪晶，在肩部内侧，一些颗粒的c轴倾向于向板材的横向(Td)方向旋转，壁面和边缘的基面织构急剧变化为c轴//Td织构。与原始板材的拉伸杯相比，摩擦处理板材的拉伸杯在肩部保持了较弱的织构强度，导致了较大的基面滑移施密德因子，从而导致了板材变薄。此外，对于摩擦处理板材的拉伸杯形件，边缘观察到由孪晶动态再结晶(TDRX)导致的细晶组织。TDRX在塑性变形的软化过程中起着重要作用，从而有利于进一步变形。基面滑移施密德因子的变化是由颗粒c轴的旋转和织构演化引起的。
Repeated unidirectional bending (RUB) process was carried out to improve the texture of AZ31 alloy sheets. Compared to the as-received sheet with a strong basal texture, the RUB processed sheet with a weaker basal texture can be successfully drawn at a larger limiting drawing ratio (LDR) of 1.7. For both the drawn cups, thec-axis of some grains tends to rotate toward the transverse direction (TD) of the sheet in the inner regions of the shoulders due to the occurrence of extension twinning and the basal texture dramatically changes to thec-axis//TD texture in the walls and the edges. Compared with the drawn cup of the as-received sheet, the drawn cup of the RUB processed sheet maintains a weaker texture intensity in the shoulder, which results in a larger Schmid factor of basal slip and thus contributes to the sheet thinning. Further, for the drawn cup of the RUB processed sheet, a finer grain microstructure resulting from the twin dynamic recrystallization (TDRX) is observed in the edge. The TDRX plays an important role in the softening during plastic deformation and consequently favours the further deformation. The changed Schmid factor of basal slip is caused by the rotation of thec-axis of grains and the texture evolution.
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影响因子：
6.3
作者：
Hua Zhang;Guangsheng Huang;D. Kong;Gao Sang;B. Song
通讯作者：
Hua Zhang;Guangsheng Huang;D. Kong;Gao Sang;B. Song
影响因子：
6.3
作者：
S. Yoshihara;K. Manabe;H. Nishimura
通讯作者：
S. Yoshihara;K. Manabe;H. Nishimura
影响因子：
6
作者：
Styczynski, A;Hartig, C;Letzig, D
通讯作者：
Letzig, D
影响因子：
6.3
作者：
F. Chen;Tyng-Bin Huang
通讯作者：
F. Chen;Tyng-Bin Huang
影响因子：
9.4
作者：
Yi, Sangbong;Bohlen, Jan;Letzig, Dietmar
通讯作者：
Letzig, Dietmar