论文部分内容阅读
使用扫描电镜对不同温度下的AZ31B镁合金平面应变多道次压缩试样断口宏观形貌进行了观察,采用金相显微镜对其压缩后显微组织进行了观察,并结合其应力—应变曲线对试样的断裂机制进行了分析。结果发现,随变形温度升高,总变形量增加而变形应力下降;试样断裂机制为韧性和脆性断裂的混合断裂机制;在平面应变多道次压缩过程中试样中心部位变形量最大,靠近边部的变形量小。
Scanning electron microscopy (SEM) was used to observe the macroscopic morphology of AZ31B magnesium alloy plane strain multi-pass compression specimen under different temperatures. The microstructure of the AZ31B magnesium alloy after compression was observed by metallographic microscope. Combined with its stress-strain curve The fracture mechanism of the sample was analyzed. The results show that as the deformation temperature increases, the total deformation increases and the deformation stress decreases. The fracture mechanism of the specimen is a mixed fracture mechanism of ductile and brittle fracture. In the plane strain multi-pass compression, the deformation of the specimen center is the largest, The deformation of the edge is small.