High temperature tensile properties of laser-welded high-strength Mg-Gd-Y-Zr alloy in as-welded and heat-treated conditions

被引：8

作者：

Wang, Lyuyuan ^{[1
,2
]}

Huang, Jian ^{[1
,2
]}

Dong, Jie ^{[3
]}

Li, Zhuguo ^{[1
,2
]}

Wu, Yixiong ^{[1
,2
]}

机构：

[1] Shanghai Jiao Tong Univ, Shanghai Key Lab Mat Laser Proc & Modificat, Shanghai 200240, Peoples R China

[2] Collaborat Innovat Ctr Adv Ship & Deep Sea Explor, Shanghai 200240, Peoples R China

[3] Shanghai Jiao Tong Univ, Natl Engn Res Ctr Light Alloys Net Forming, Shanghai 200240, Peoples R China

来源：

WELDING IN THE WORLD | 2017年 / 61卷 / 02期

关键词：

Magnesiumalloys; Post-weld heat treatment; Mechanical properties; Microstructure; Elevated temperature strength; AZ31B MAGNESIUM ALLOY; MG-10GD-2Y-0.5ZR ALLOY; MECHANICAL-PROPERTIES; WT.PERCENT ALLOY; MICROSTRUCTURE; 250-DEGREES-C; PARAMETERS; DEFECTS;

D O I：

10.1007/s40194-016-0404-y

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The high temperature tensile properties of fiber laser-welded Mg-Gd-Y-Zr alloy in the as-welded and heattreated state were systematically studied. The elevated temperature tensile properties of as-welded and heat-treated joints declined slightly from room temperature to 200 degrees C. With the temperature reaching 300 degrees C, the strengths of the two types of joints plummeted. High temperature tensile properties can be enhanced significantly by the beta' precipitates in the fusion zone and heat-affected zone after heat treatment. The ultrafine grains and unstable divorced eutectic in the fusion zone of as-welded joints deteriorated the tensile properties at 300 degrees C. The deformation mechanism of the heat-treated samples at 300 degrees C is the dislocation slip with void growth at the grain boundaries due to the dissolution of precipitates.

引用

页码：299 / 306

页数：8

共 25 条

[1] SOLID SOLUTION STRENGTHENING OF MAGNESIUM SINGLE CRYSTALS .2. EFFECT OF SOLUTE ON EASE OF PRISMATIC SLIP [J].