Analysis of white layers formed in hard turning of AISI 52100 steel

被引：197

作者：

Ramesh, A

Melkote, SN ^{[1
]}

Allard, LF

Riester, L

Watkins, TR

机构：

[1] Georgia Inst Technol, George W Woodruff Sch Mech Engn, Atlanta, GA 30332 USA

[2] Oak Ridge Natl Lab, High Temp Mat Lab, Oak Ridge, TN 37831 USA

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2005年 / 390卷 / 1-2期

基金：

美国国家科学基金会;

关键词：

white layers; hard turning; plastic deformation; phase transformation;

D O I：

10.1016/j.msea.2004.08.052

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The formation mechanisms and properties of white layers produced in machining of hardened steels are not clearly understood to date. In particular, detailed analysis of their structure and mechanical properties is lacking. This paper investigates the differences in structure and properties of white layers formed during machining of hardened AISI 52100 steel (62 HRC) at different cutting speeds. A combination of experimental techniques including transmission electron microscopy (TEM), X-ray diffraction (XRD), and nano-indentation are used to analyze the white layers formed. TEM results suggest that white layers produced at low-to-moderate cutting speeds are in large part due to grain refinement induced by severe plastic deformation, whereas white layer formation at high cutting speeds is mainly due to thermally-driven phase transformation. The white layers at all speeds are found to be comprised of very fine (nano-scale) grains compared to the bulk material. XRD-based residual stress and retained austenite measurements, and hardness data support these findings. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：88 / 97

页数：10

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