Nanocrystalline structure formation in carbon steel introduced by high speed drilling

被引：28
作者：
Li, J. G.
Umemoto, M.
Todaka, Y.
Tsuchiya, K.
机构：
[1] Toyohashi Univ Technol, Dept Prod Syst Engn, Toyohashi, Aichi 4418580, Japan
[2] Chinese Acad Sci, Dept Superalloy, Inst Met Res, Shenyang 110016, Peoples R China
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2006年 / 435卷
关键词：
nanocrystalline structure; dynamic phase transformation; strain gradient; drilling; carbon steel; SEVERE PLASTIC-DEFORMATION; WHITE LAYERS; FERRITE FORMATION; MICROSTRUCTURE; SURFACE; TRANSFORMATION; MECHANISMS; STRAIN; WEAR;
D O I：
10.1016/j.msea.2006.07.036
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The microstructure of drilled hole surface on an Fe-0.56% C steel (as-quenched martensite structure) has been investigated. A several microns thick nanocrystalline structure layer with an average grain size of the order of 10 nm was observed on the topmost surface of holes drilled at high speed. The existence of retained austenite on the hole surface suggests the occurrence of dynamic phase transformation (DPT) from bcc to fcc during high speed drilling. It is proposed that the nanocrystalline structure layer on the drilled hole surface is produced by a large strain gradient together with severe plastic deformation (SPD) induced DPT. (c) 2006 Elsevier B.V. All rights reserved.
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收藏
页码：383 / 388
页数：6
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