Effect of Laves Phases on Creep Strength for a Mg-Al-Ca Alloy

被引：0

作者：

Yamashita, You ^{[1
,2
]}

Terada, Yoshihiro ^{[1
]}

机构：

[1] Tokyo Inst Technol, Sch Mat & Chem Technol, Dept Mat Sci & Engn, Yokohama 2268502, Japan

[2] Chubu Elect Power Co Inc, Tokyo Inst Technol, Nagoya, Japan

来源：

JOURNAL OF THE JAPAN INSTITUTE OF METALS AND MATERIALS | 2024年 / 88卷 / 02期

关键词：

magnesium alloy; die-cast; creep; C15-Al2Ca; C36-(Mg; Al)(2)Ca; MICROSTRUCTURE; PRECIPITATION;

D O I：

10.2320/jinstmet.J2023031

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The effect of Laves phases, C36-(Mg,Al)(2)Ca and C15-Al2Ca, on high-temperature creep strength was quantitatively investigated for the Mg-5.0Al-1.5Ca alloy produced by die-casting. The homogenization treatment at 750 K for 1 h was carried out to divorce the interconnected skeleton of C36 phase, and the aging treatment at 523 K for 1-1000 h was performed to precipitate the C15 phase within the alpha-Mg grains. The creep tests to evaluate the creep strength were conducted at 447 K and 70 MPa. When the C36 skeleton is divorced, the minimum creep rate dramatically increases by a factor of 330. The coarsening of the C15 phase within the alpha-Mg grains increases the creep rate by a factor of 2.6. It was identified that the creep strength of the Mg-5.0Al-1.5Ca alloy is predominantly ascribed to the interconnected skeleton of C36 phase rather than the precipitation strengthening of C15 phase.

引用

页码：27 / 30

页数：4

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