Influence of Laser-Welding on Microstructure and Corrosion Properties of Twinning-Induced Plasticity (TWIP) Steel

被引：5
作者：
Xu, Chengcheng [1 ]
Zhang, Youkang [2 ]
Liu, Wanlei [1 ]
Jin, Ying [1 ,3 ]
Wen, Lei [1 ,3 ]
Sun, Dongbai [4 ]
机构：
[1] Univ Sci & Technol Beijing, Natl Ctr Mat Serv Safety, Beijing 100083, Peoples R China
[2] Beijing Aerosp Xinli Technol Co Ltd, Beijing 100039, Peoples R China
[3] Southern Marine Sci & Engn Guangdong Lab, Innovat Grp Marine Engn Mat & Corros Control, Zhuhai 519080, Peoples R China
[4] Sun Yat Sen Univ, Sch Mat, Guangzhou 510275, Peoples R China
来源：
MATERIALS | 2020年 / 13卷 / 19期
基金：
北京市自然科学基金;
关键词：
TWIP steel; laser welding; electron back-scattering diffraction EBSD; corrosion property; scanning Kelvin probe (SKP); surface potential; THIN ELECTROLYTE LAYERS; HYDROGEN EMBRITTLEMENT; ATMOSPHERIC CORROSION; GALVANIC CORROSION; GRAIN; BEHAVIOR; PERFORMANCE; METALS; REFINEMENT; EVOLUTION;
D O I：
10.3390/ma13194315
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The effect of welding speed on microstructure, mechanical properties, and corrosion properties of laser-assisted welded joints of a twinning-induced plasticity (TWIP) steel was investigated by using X-ray diffraction (XRD), scanning electron microscopy (SEM), electron backscattered diffraction (EBSD) analysis, electrochemical test, and micro-area scanning Kelvin probe test (SKP). The results reveal that the welded joints, with a fully austenitic structure, are obtained by laser welding. In addition, the preferred orientation of grains in fusion zone (FZ) increased with the increase of welding speed. Additionally, the coincidence site lattice (CSL) grain boundaries of FZ decreased with increasing welding speed. However, potentiodynamic polarization and SKP results demonstrated that the welding speed of 1.5 m/min renders superior corrosion resistance. It can also be inferred that the corrosion properties of the welded joints are related to the grain size and frequency of CSL grain boundary in FZ.
引用
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页码：1 / 11
页数：11
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