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| 表面机械研磨诱导AISI 304不锈钢表层纳米化Ⅱ.晶粒细化机理 | |
| 引用本文： | 张洪旺,刘刚,黑祖昆,吕坚,卢柯. 表面机械研磨诱导AISI 304不锈钢表层纳米化Ⅱ.晶粒细化机理[J]. 金属学报, 2003, 39(4): 347-350 |
| 作者姓名： | 张洪旺 刘刚 黑祖昆 吕坚 卢柯 |
| 作者单位： | 1. 中国科学院金属研究所沈阳材料科学国家(联合)实验室,沈阳,110016;大连海事大学材料工艺研究所,大连,116026 2. 中国科学院金属研究所沈阳材料科学国家(联合)实验室,沈阳,110016 3. 大连海事大学材料工艺研究所,大连,116026 4. LASMIS,University ofTechnology of Troyes,10000,Troyes,France |
| 基金项目： | 国家自然科学基金项目50071061、中国科学院知识创新工程项目和Conseil Regional de Champagne Ardenne France资助 |
| 摘 要： | 采用表面机械研磨处理(SMAT)在AISI 304不锈钢上制备出纳米结构表层，用透射电镜(TEM)研究组织演变过程．晶粒细化机理可归纳如下：位错在{111}面上滑移并相互交割形成网格结构；单系孪晶形成并逐渐过渡到多系孪晶；多系孪晶相互交割使晶粒尺寸不断减小，并在孪晶交叉处形成了马氏体相；孪晶系增多与孪晶重复交割强度加大使得细化晶粒的尺寸进一步减小；最终在大应变量、高应变速率和多方向重复载荷的作用下，形成等轴状、取向呈随机分布的马氏体相纳米晶组织． |
| 关 键 词： | 表面机械研磨 不锈钢 表面纳米化 晶粒细化机制 |
| 文章编号： | 0412-1961(2003)04-0347-04 |
| 修稿时间： | 2002-07-18 |
SURFACE NANOCRYSTALLIZATION OF AISI 304 STAINLESS STEEL INDUCED BY SURFACE MECHANICAL ATTRITION TREATMENT Ⅱ. Grain Refinement Mechanism |
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| ZHANG Hongwang,LIU Gang,HEI Zukun,LU Jian,LU Ke) Shenyang National Laboratory for Materials Science. SURFACE NANOCRYSTALLIZATION OF AISI 304 STAINLESS STEEL INDUCED BY SURFACE MECHANICAL ATTRITION TREATMENT Ⅱ. Grain Refinement Mechanism[J]. Acta Metallurgica Sinica, 2003, 39(4): 347-350 | |
| Authors: | ZHANG Hongwang LIU Gang HEI Zukun LU Jian LU Ke) Shenyang National Laboratory for Materials Science |
| Affiliation: | ZHANG Hongwang,LIU Gang,HEI Zukun,LU Jian,LU Ke1) Shenyang National Laboratory for Materials Science,Institute of Metal Research,The Chinese Academy of Science,Shenyang 1100162) Institute of Materials &, Technology,Dalian Maritime University,Dalian 1160263) LASMIS,University of Technology of Troyes,10000,Troyes,FranceCorrespondent: LIU Gang,associate professor,Tel: 13940169394,Fax: |
| Abstract: | Nanostructured surface layer was synthesized on an AISI 304 stainless steel by using surface mechanical attrition treatment (SMAT), the microstructural evolution was examined by using the transmission electron microscope (TEM). A grain refinement mechanism was proposed as follows: dislocations slip in the {111} plane and intersect to form dislocation grids. One-system twins form and develop gradually to multi-system ones. Twin-twin intersections reduce the grain size and induce martensite transformation. With the increment of the twin systems and the enhancement of the twin intersection activities, grains are further refined. Finally, nano-scale martensite phase with equaixed shape and random crystallographic orientations forms upon the much larger strain, high strain rate and multidirectional repeated loads. |
| Keywords: | surface mechanical attrition treatment AISI 304 stainless steel surface nanocrystallization grain refinement mechanism |
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