Interstitial defects in 316L austenitic stainless steel containing "colossal" carbon concentrations: An internal friction study

被引：34
作者：
Heuer, A. H. [1 ]
Ernst, F.
Kahn, H.
Avishai, A.
Michal, G. M.
Pitchure, D. J.
Ricker, R. E.
机构：
[1] Case Western Reserve Univ, Cleveland, OH 44106 USA
[2] Natl Inst Standards & Technol, Gaithersburg, MD USA
来源：
SCRIPTA MATERIALIA | 2007年 / 56卷 / 12期
关键词：
carburization; internal friction; point defect clusters; stainless steel; strengthening mechanisms;
D O I：
10.1016/j.scriptamat.2007.02.035
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Carburization of 316L austenitic stainless steel under paraequilibrium conditions results in extremely hard (similar to 1100 HV) single-phase cases containing surface carbon concentrations of similar to 15 mol.% and very high residual compressive stresses (>= 2 GPa). Carburization produced an anelastic relaxation peak at 543 K (1.0 Hz), due to a carbon-containing defect with a highly anisotropic strain field. Interstitial solid-solution strengthening theories can explain the approximate three-fold increase in hardness, using reasonable parameters for the strain ellipsoids of these defects. (c) 2007 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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页码：1067 / 1070
页数：4
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