Improvement of mechanical properties of aluminum die casting alloy by multi-pass friction stir processing

被引：177

作者：

Nakata, K. ^{[1
]}

Kim, Y. G. ^{[1
]}

Fujii, H. ^{[1
]}

Tsumura, T. ^{[1
]}

Komazaki, T. ^{[1
]}

机构：

[1] Osaka Univ, Joining & Welding Res Inst, Ibaraki, Osaka 5670047, Japan

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2006年 / 437卷 / 02期

基金：

日本学术振兴会;

关键词：

friction stir processing; mechanical properties; hardness; tensile strength; cold flake;

D O I：

10.1016/j.msea.2006.07.150

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

An improvement in the mechanical properties was accomplished due to the microstructural modification of an aluminum die casting alloy by multi-pass friction stir processing (MP-FSP), which is a solid-state microstructural modification technique using a frictional heat and stirring action. The hardness of the MP-FSP sample is about 20 Hv higher than that of the base metal. The tensile strengths of the MP-FSPed specimens were significantly increased to about 1.7 times versus that of the base metal. This is due not only to the disappearance of the cold flake in the base metal, but also to a structural refinement, such as uniform distribution of Si particles. Thus, the application of the MP-FSP is a very effective method for the mechanical improvement of aluminum die casting alloys. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：274 / 280

页数：7

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