期刊
FATIGUE & FRACTURE OF ENGINEERING MATERIALS & STRUCTURES
卷 41, 期 8, 页码 1758-1770出版社
WILEY
DOI: 10.1111/ffe.12816
关键词
ECAP process; fracture toughness; grain size; mixed mode; textural
In this study, effects of equal channel angular pressing (ECAP) on the mixed-mode fracture toughness of Al-6063 were investigated. The ECAP process continued up to 5 passes without failure. Grain refinement was obvious after 5 passes of the ECAP process. The average grain size reduced from to less than , and textural studies shows aligning the grains in known directions. After 4 passes, yield and ultimate strengths increase respectively from 100 and 209MPa to 300 and 375MPa and reduction in elongation was also observed. The microhardness improved after the process. The fracture toughness for different orientations was measured. For pure mode I (opening mode), its value decreased after the first pass from 18.4 to 15.71 MPahowever, it increased to about 18.8 MPaafter the fifth pass. For mixed-mode loading condition, different orientations were investigated. The results revealed different fracture toughness reductions after the first passes of the process for specimens with different orientations. The fracture surfaces were studied by using scanning electron microscope, and refined equiaxed dimples were observed after the ECAP process.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据