粗晶纯Al在预疲劳变形过程中的力学性能研究  

Mechanical Properties of Coarse-grain Pure Al in Pre-fatigue Deformation Process

作　　者：杨光春[1] 

机构地区：[1]攀枝花学院机械工程学院,四川攀枝花617000

出　　处：《铸造技术》2014年第6期1173-1175,共3页Foundry Technology

摘　　要：研究了粗晶纯Al在预疲劳变形后的显微结构和力学性能。结果表明,材料微裂纹晶界处向相邻晶粒发展。大量裂纹的存在使得粗晶纯Al的均匀伸长率和抗拉强度降低。预疲劳后单向拉伸断口形貌主要由剪切唇和纤维区构成,并且断口处存在撕裂痕迹。The microstructures and mechanical properties of coarse-grain pure Al after pre-fatigue deformation were investigated. The results show that the cracks of the material extend from grain boundary to neighboring grain. The uniform elongation and tensile strength of the pure Al decrease due to the existence of a large amount of cracks. And the fracture morphology after pre-fatigue is mainly made of shear lip and fiber region, and the tear trace presents at the fracture place.

关 键 词：预疲劳变形 断口形貌 力学性能 

分 类 号：TG146.21[一般工业技术—材料科学与工程]