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Effect of Rolling Process on Microstructures and Mechanical Properties of High Strain-Rate Rolled ZK60 Magnesium Alloy
Russian Journal of Non-Ferrous Metals ( IF 0.6 ) Pub Date : 2020-12-28 , DOI: 10.3103/s1067821220060073
Xvhui Feng , Youping Sun , Xvhuang Feng , Jiangmei He , Siyu Wan

A high strain-rate rolling (HSRR) process was successfully used to produce a ZK60 magnesium alloy sheet with a strength-toughness balance. In one-pass rolling, as the rolling rate increases, the edge cracking of the sheets decreases and the grain size increases continuously, and the grain size ranges from 1.4 μm at 5 s–1 to 4.2 μm at 25 s–1. When the strain rate is 5 s–1, the tensile strength and elongation of the ZK60 magnesium alloy are 355 MPa and 12.40%, respectively. As the rolling rate increases, the tensile strength decreases from 355 to 310 MPa. When the rolling rate is less than 20 s–1, the texture strength decreases with the strain rate, from 9.064 at 5 s–1 to 4.480 at 20 s–1, but when the strain rate is 25 s–1, the texture increases to 7.099. At the same time, the study also found that the two-pass rolling process can weaken the texture and increase the tensile strength. The texture strength decreased from 9.04 in a one-pass rolling process to 8.528, and the tensile strength increased from 355 MPa in a one-pass rolling process to 377 MPa.



中文翻译:

轧制工艺对高应变速率轧制ZK60镁合金组织和力学性能的影响

高应变率轧制(HSRR)工艺成功用于生产具有强度-韧性平衡的ZK60镁合金薄板。在一次通过轧制中,随着轧制速度的增加,板材的边缘开裂减少,晶粒尺寸连续增加,晶粒尺寸范围从5 s –1时的1.4μm到25 s –1时的4.2μm 。当应变率为5 s –1时,ZK60镁合金的拉伸强度和伸长率分别为355 MPa和12.40%。随着轧制速度的增加,抗拉强度从355 MPa降低到310 MPa。当轧制速度小于20 s –1时,织构强度随应变率而降低,从5 s –1时的9.064降至20 s –1时的4.480,但是当应变率为25 s –1时,纹理会增加到7.099。同时,研究还发现,两次通过的轧制过程可以削弱织构并增加抗拉强度。织构强度从单遍轧制的9.04降低到8.528,抗拉强度从单遍轧制的355 MPa增加到377 MPa。

更新日期:2020-12-28
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