Effects of graphene nanoplates on microstructures and mechanical properties of NSA-TIG welded AZ31 magnesium alloy joints

被引：16
|
作者：
Zhang, Tao [1 ]
Shen, Jun [1 ]
Lu, Lu-qiang [1 ]
Wang, Chun-min [1 ]
Sang, Jia-xin [1 ]
Wu, Dong [1 ]
机构：
[1] Chongqing Univ, Coll Mat Sci & Engn, State Key Lab Mech Transmiss, Chongqing 400044, Peoples R China
来源：
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA | 2017年 / 27卷 / 06期
基金：
中国国家自然科学基金;
关键词：
graphene nanoplate; nanoparticles strengthening activating gas tungsten inert arc welding; AZ31 magnesium alloy; microstructure; mechanical properties; SIC PARTICLES; MATRIX COMPOSITES; COMPRESSION; FLUXES; SHAPE;
D O I：
10.1016/S1003-6326(17)60149-3
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
The effects of graphene nanoplates (GNPs) on the microstructures and mechanical properties of nanoparticles strengthening activating tungsten inert gas arc welding (NSA-TIG) welded AZ31 magnesium alloy joints were investigated. It was found that compared with those of activating TIG (A-TIG), and obvious refinement of alpha-M-Mg grains was achieved and the finest alpha-Mg grains of fusion zone of NSA-TIG joints were obtained in the welded joints with TiO2+ GNPs flux coating. In addition, the penetrations of joints coated by TiO2+ GNPs flux were similar to those coated by the TiO2+ SiCp flux. However, the welded joints with TiO2+ GNPs flux coating showed better mechanical properties (i.e., ultimate tensile strength and microhardness) than those with TiO2+ SiCp flux coating. Moreover, the generation of necking only occurred in the welded joints with TiO2+ GNPs flux.
引用
收藏
页码：1285 / 1293
页数：9
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