A thousandfold creep strengthening by Ca addition in die-cast AM50 magnesium alloy

被引：45

作者：

Terada, M ^{[1
]}

Sota, R

Ishimatsu, N

Sato, T

Ohori, K

机构：

[1] Tokyo Inst Technol, Dept Met & Ceram Sci, Meguro Ku, Tokyo 1528552, Japan

[2] Mitsubishi Aluminum Co Ltd, Tech Dev Ctr, Shizuoka 4101127, Japan

来源：

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 2004年 / 35A卷 / 09期

关键词：

D O I：

10.1007/s11661-004-0046-3

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effect of calcium addition on the microstructure and creep strength of the die-cast AM50 magnesium alloy was investigated. The alpha-Mg grains with the diameter of 4.9 mum are surrounded by the eutectic phases for the AM50-1.72 mass pct Ca alloy, while the beta(Mg17Al12) particles are located mainly on the grain boundaries of the alpha grains for the AM50 alloy. The minimum creep rates of the AM50-1.72 mass pct Ca alloy are three orders of magnitude lower than those of the AM50 alloy at 423 K typically below 120 MPa. The thousandfold creep strengthening by the Ca addition is ascribed to the thermally stable eutectic phases appearing in the AM50-1.72 mass pct Ca alloy, which is expected to yield effective grain boundary strengthening or to resist the plastic flow of the alpha-Mg grains.

引用

页码：3029 / 3032

页数：4

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