期刊
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
卷 13, 期 6, 页码 775-783出版社
ASM INTERNATIONAL
DOI: 10.1361/10599490421358
关键词
composite; fracture toughness; matrix strength; particle size; tensile properties; volume fraction
The goal of this work was to evaluate the effects of particle size, particle volume fraction, and matrix strength on the monotonic fracture properties of two different Al alloys, namely T1-Al2124 and T1-Al6061, reinforced with silicon carbide particles (SiCp). From the tensile tests, an increase in particle volume fraction and/or matrix strength increased strength and decreased ductility. On the other hand, an increase in particle size reduced strength and increased the composite ductility. In fracture toughness tests, an increase in particle volume fraction reduced the toughness of the composites. An increase in matrix strength reduced both K-crit and delta(crit) values. However, in terms of K-Q (5%) values, the Al6061 composite showed a value similar to the corresponding Al2124 composite. This was mainly attributed to premature yielding caused by the high ductility/low strength of the Al6061 matrix and the testpiece dimensions. The effect of particle size on the fracture toughness depends on the type of matrix and toughness parameter used. In general, an increase in particle size decreased the K-Q (5%) value, but simultaneously increased the amount of plastic strain that the matrix is capable of accommodating, increasing both delta(crit) and K-crit values.
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