FRACTURE CHARACTERISTICS OF AN AL-SI-MG MODEL COMPOSITE SYSTEM

被引：21

作者：

MANOHARAN, M ^{[1
]}

LEWANDOWSKI, JJ ^{[1
]}

HUNT, WH ^{[1
]}

机构：

[1] ALCOA TECH CTR,ALCOA CTR,PA 15069

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 1993年 / 172卷 / 1-2期

关键词：

D O I：

10.1016/0921-5093(93)90426-F

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The fracture toughness characteristics of an Al-Si-Mg model composite system were examined. Through manipulating composition and processing variables, controlled variations in particle volume fraction and matrix flow properties were produced and tested using J(IC) tests. Metallographic analysis shows that the fracture process proceeds by the cracking of Si particles ahead of the crack tip in a very localized region. This is compared with results from smooth uniaxial tensile specimens which, while exhibiting the same particle cracking mode of fracture, have damage distributed over a wider area of the specimen. The results for the Al-Si-Mg model alloys are compared with J(IC) results for commercial composite systems, and the differences observed are discussed in terms of the characteristics of the reinforcement particles.

引用

页码：63 / 69

页数：7

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