摘要
在室温对完全时效商业7003铝合金进行4道次Bc路径ECAP挤压后进行拉伸和硬度试验,借助SEM和EDS对断口进行分析。结果表明:随着拉伸道次的增加,硬度和抗拉强度的增强,延展性下降明显;断口为韧性断裂,出现等轴韧窝、撕裂韧窝、剪切韧窝和卵形韧窝;第二相质点对韧窝尺寸的影响非常大。
An overaged commercial A1 7003 alloy was processed by equal channel angular pressing （ECAP） at ambient temperature for a total of 4 passes with route Bc. The mechanical properties of the alloy were examined by tensile test and hardness tests, then the fracture was investigated by SEM and EDS. The results show that with the increase of ECAP passes, the hardness and tensile strength is enhanced, but the elongation decreases. The fracture mode is ductile fracture. The equiaxed dimples, tear dimples, shear dimples and oval dimples were observed. The second phase particle extremely influences on the dimple size.
出处
《热加工工艺》
CSCD
北大核心
2012年第12期20-21,24,共3页
Hot Working Technology
基金
国家自然科学基金项目(51064016)
关键词
韧性断裂
韧窝
力学性能
ductile fracture
dimple
mechanical property
