Hot corrosion behavior of TC11 titanium alloy treated by laser shock processing

被引：46
作者：
Hua, Yinqun [1 ]
Bai, Yuchuan [2 ]
Ye, Yunxia [2 ]
Xue, Qing [2 ]
Liu, Haixia [1 ]
Chen, Ruifang [2 ]
Chen, Kangmin [1 ]
机构：
[1] Jiangsu Univ, Sch Mat Sci & Engn, Zhenjiang 212013, Jiangsu, Peoples R China
[2] Jiangsu Univ, Sch Mech Engn, Zhenjiang 212013, Jiangsu, Peoples R China
来源：
APPLIED SURFACE SCIENCE | 2013年 / 283卷
基金：
中国国家自然科学基金;
关键词：
Hot corrosion; Laser shock processing; TC11 titanium alloy; Microstructure; ALUMINUM-ALLOY; MICROSTRUCTURE; 304-STAINLESS-STEEL; RESISTANCE;
D O I：
10.1016/j.apsusc.2013.07.017
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 aim of this research is to improve the hot corrosion resistance of TC11 titanium alloy by laser shock processing. Specimens were treated by laser shock processing on the whole surface. The hot corrosion resistance beneath Na2SO4 containing 20 wt.% NaCl salt deposits at 650 degrees C, 800 degrees C and 900 degrees C in air was investigated. The effects of LSP impacts on surface microstructure, residual stress, and microstructure after hot corrosion were investigated by transmission electron microscope, X-ray diffraction technology, and scanning electron microscope. Results show that laser shock processing can induce -295 MPa compressive residual stresses. The microstructure after LSP was characterized by a high amount of twins and highly tangled and dense dislocation arrangements. We even observed nano-crystallization. More protective oxidation films were remained on the surface of laser shocked specimens after hot corrosion, and it mainly consists of TiO2, Al2O3, MoO3, etc. The average corrosion rate of TC11 titanium alloy treated by laser shock processing is more than 50% lower than that of the untreated alloy. Crown Copyright (C) 2013 Published by Elsevier B.V. All rights reserved.
引用
收藏
页码：775 / 780
页数：6
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