Microstructure and microhardness analysis of the hexagonal oxides formed on the surface of the AISI 304 stainless steel after Nd:YAG pulsed laser surface melting

被引：12
作者：
Cui, C. Y. [1 ]
Cui, X. G. [1 ]
Zhang, Y. K. [1 ]
Luo, K. Y. [1 ]
Zhao, Q. [1 ]
Hu, J. D. [2 ]
Liu, Z. [3 ]
Wang, Y. M. [3 ]
机构：
[1] Jiangsu Univ, Sch Mech Engn, Zhenjiang 212013, Peoples R China
[2] Jilin Univ, Changchun 130025, Peoples R China
[3] Laser Inst Jilin, Changchun 130012, Peoples R China
来源：
APPLIED SURFACE SCIENCE | 2010年 / 256卷 / 22期
基金：
中国国家自然科学基金; 中国博士后科学基金;
关键词：
LSM; Stainless steel; Hexagon; Morphology; HRTEM; Microhardness; STAINLESS-STEEL; WEAR-RESISTANCE; FILMS; BEHAVIOR; CORROSION;
D O I：
10.1016/j.apsusc.2010.04.089
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 laser surface melting (LSM) technique was adopted to modify the surface layer microstructure of the AISI 304 stainless steel in this paper. The results showed that the hexagonal morphologies have been successfully fabricated on the surface after LSM. These hexagons had side lengths of about 0.5-1 mu m and were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), field emission scanning electron microscope (FESEM) and high resolution transmission electron microscope (HRTEM). It was proved by the XRD that the stainless steel surface mainly consisted of gamma-Fe, Cr2O3, Fe2O3 and some manganese oxides. The FESEM micrographs showed that the hexagonal oxides were regular hexagons in geometry. The HRTEM micrographs also indicated the presence of the hexagons on the surface of the stainless steel. The spacing values were calculated from the HRTEM micrograph and the SAED pattern, and the hexagonal oxide phases determined by these spacing values were consistent with those verified by the XRD. After LSM, the microhardness of the stainless steel was significantly improved. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码：6782 / 6786
页数：5
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