Influence of Continuous Bending Process on Texture Evolution and Mechanical Properties of AZ31 Magnesium Alloy
来源期刊：Acta Metallurgica Sinica2018年第3期
论文作者：Ting-Zhuang Han Guang-Sheng Huang Lun Huang Bin Jiang Guan-Gang Wang Ai-Tao Tang Fu-Sheng Pan
文章页码：225 - 233
摘 要：Mg–3Al–1Zn alloy sheets have been deformed by continuous bending（CB） to investigate the effects of pro cessing parameters（bending angle and repetitive passes） on the texture and formability. The samples exhibited a bimoda microstructure with abnormal growth grains in the surface region and fine grains distributed in the center after CB process followed by annealing. The texture evolution measured by XRD indicated that the basal poles were rotated from ND toward RD, and the texture intensity decreased with the bending angle decreasing and repetitive passes increasing Compared with the as-received sample, the yield strength of CBA-120-2 sample significantly decreased from 183 to112 MPa, and a smaller r-value and a larger n-value were obtained. The formability of CB processed samples in annealing condition was significantly enhanced with the highest of Erichsen value of 5.4 mm, increased by about 135%. The improvement of formability was likely attributed to the weakened and RD-tilt basal texture and coarse grains in the surface part.
Ting-Zhuang Han1,2，Guang-Sheng Huang1,2,3，Lun Huang1,2，Bin Jiang1,2,3，Guan-Gang Wang1,2，Ai-Tao Tang1,2,3，Fu-Sheng Pan1,2,3
1. State Key Laboratory of Mechanical Transmission, College of Materials Science and Engineering, Chongqing University2. National Engineering Research Center for Magnesium Alloys, Chongqing University3. Chongqing Research Center for Advanced Materials,Chongqing Academy of Science & Technology
摘 要：Mg–3Al–1Zn alloy sheets have been deformed by continuous bending（CB） to investigate the effects of pro cessing parameters（bending angle and repetitive passes） on the texture and formability. The samples exhibited a bimoda microstructure with abnormal growth grains in the surface region and fine grains distributed in the center after CB process followed by annealing. The texture evolution measured by XRD indicated that the basal poles were rotated from ND toward RD, and the texture intensity decreased with the bending angle decreasing and repetitive passes increasing Compared with the as-received sample, the yield strength of CBA-120-2 sample significantly decreased from 183 to112 MPa, and a smaller r-value and a larger n-value were obtained. The formability of CB processed samples in annealing condition was significantly enhanced with the highest of Erichsen value of 5.4 mm, increased by about 135%. The improvement of formability was likely attributed to the weakened and RD-tilt basal texture and coarse grains in the surface part.
关键词：
