论文部分内容阅读
以热轧Mg-Al-Sn合金板材为研究对象,对轧制试样进行250~450℃的退火,研究了晶粒尺寸和应变速率对Mg-Al-Sn合金室温变形行为的影响规律。结果表明,同一应变量下,随晶粒尺寸增加,合金屈服强度、抗拉强度及伸长率降低,孪晶数量增加,且随着应变量的增加,同一晶粒尺寸合金中孪晶数量逐渐增加。随应变速率降低,合金屈服强度与抗拉强度不断减小,而伸长率则不断增加。同一应变量下,随应变速率降低,合金中孪晶体积分数降低。
The effects of grain size and strain rate on the deformation behavior of Mg-Al-Sn alloy at room temperature were investigated by taking the hot rolled Mg-Al-Sn alloy sheet as the research object and annealing the rolled specimen at 250-450 ℃. The results show that with the increase of grain size, the yield strength, tensile strength and elongation decrease, the number of twins increases with the increase of grain size, and the amount of twins in the same grain size alloy gradually increases with the increase of strain increase. As the strain rate decreases, the yield strength and tensile strength of the alloy decrease, while the elongation increases. The same strain, with the strain rate decreases, the twin alloy volume fraction decreases.