Formation of nanostructured surface layer on AISI 304 stainless steel by means of surface mechanical attrition treatment

被引：722
作者：
Zhang, HW
Hei, ZK
Liu, G
Lu, J
Lu, K [1 ]
机构：
[1] Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
[2] Dalian Maritime Univ, Inst Mat & Technol, Dalian 116026, Peoples R China
[3] Univ Technol Troyes, LASMIS, F-10000 Troyes, France
来源：
ACTA MATERIALIA | 2003年 / 51卷 / 07期
基金：
中国国家自然科学基金;
关键词：
surface mechanical attrition treatment; nanostructured material; grain refinement mechanism; AISI 304 stainless steel; mechanical twins;
D O I：
10.1016/S1359-6454(02)00594-3
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A nanostructured surface layer was formed on an AISI 304 stainless steel with low stacking-fault energy by means of the surface mechanical attrition treatment (SMAT). The microstructure of the surface layer of the SMATed sample was characterized by using X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM), and cross-sectional TEM observation was performed to reveal the deformation-driven grain refinement mechanism for the f.c.c. materials with very low stacking-fault energy during SMAT. The grain refinement process in the surface layer involves formation of planar dislocation arrays and twins in deformed grains, twin-twin intersections leading to grain subdivision and a martensite transformation as well, and formation of randomly orientated refined crystallites. The formation of nanocrystallites in the top surface layer was ascribed to the much large strain and strain rate, as well as the multidirectional repetitive loading. (C) 2003 Acta Materialia Inc. Published by Elsevier Science Ltd. All rights reserved.
引用
收藏
页码：1871 / 1881
页数：11
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