Thermal stability of ultrafine grained Fe-Cr-Ni alloy

被引：30

作者：

Sun, C. ^{[1
]}

Yang, Y. ^{[2
]}

Liu, Y. ^{[1
]}

Hartwig, K. T. ^{[1
]}

Wang, H. ^{[3
]}

Maloy, S. A. ^{[4
]}

Allen, T. R. ^{[5
]}

Zhang, X. ^{[1
]}

机构：

[1] Texas A&M Univ, Dept Mech Engn, Mat Sci & Engn Program, College Stn, TX 77843 USA

[2] Univ Florida, Dept Mat Sci & Engn, Nucl Engn Program, Gainesville, FL 32611 USA

[3] Texas A&M Univ, Dept Elect & Comp Engn, College Stn, TX 77843 USA

[4] Los Alamos Natl Lab, Div Mat Sci & Technol, Los Alamos, NM 87545 USA

[5] Univ Wisconsin, Dept Engn Phys, Madison, WI 53706 USA

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2012年 / 542卷

关键词：

Equal channel angular pressing ultrafine grain; Fe-Cr-Ni alloy; Thermal stability; DEFORMATION-INDUCED TRANSFORMATION; AUSTENITIC STAINLESS-STEELS; MECHANICAL-PROPERTIES; STRAIN STATE; GROWTH; MICROSTRUCTURES; IRRADIATION; REFINEMENT; BEHAVIOR; TENSILE;

D O I：

10.1016/j.msea.2012.02.033

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Equal channel angular pressing was used to refine the microstructure of a Fe-14Cr-16Ni (wt.%) alloy. The as-processed alloy had predominantly equiaxed austenite fine grains with an average grain size of 0.4 mu m and a low fraction of deformation induced martensite. Ex situ isothermal annealing experiments showed the fine microstructure was thermally stable up to 673 K, and abnormal grain growth occurred at similar to 873 K. In situ annealing studies in a transmission electron microscope revealed the coarsening of grains. Analysis of grain growth kinetics from 873 to 1073 K yielded average activation energy of grain growth to be similar to 207 kJ/mol. The grain growth mechanisms and annealing induced evolution of mechanical properties were discussed. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：64 / 70

页数：7

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