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

被引：35

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.

引用

页码：1067 / 1070

页数：4

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