High-strength steels hardened mainly by nanoscale NiAl precipitates

被引：106

作者：

Jiao, Z. B. ^{[1
]}

Luan, J. H. ^{[1
]}

Zhang, Z. W. ^{[2
]}

Miller, M. K. ^{[3
]}

Liu, C. T. ^{[1
]}

机构：

[1] City Univ Hong Kong, Coll Sci & Engn, Dept Mech & Biomed Engn, Ctr Adv Struct Mat, Hong Kong, Hong Kong, Peoples R China

[2] Harbin Engn Univ, Coll Mat Sci & Chem Engn, Harbin 150001, Heilongjiang, Peoples R China

[3] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA

来源：

SCRIPTA MATERIALIA | 2014年 / 87卷

关键词：

NiAl precipitate; Ferritic steel; Precipitation; Atom probe tomography; Mechanical property; MICROSTRUCTURAL EVOLUTION; TEMPORAL EVOLUTION;

D O I：

10.1016/j.scriptamat.2014.05.006

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

NiAl-strengthened high-strength steels usually have high Ni and Al contents in order to form hardening particles. Here, several new low-Ni steels are reported, which achieve a combination of relatively low cost, high strength and good ductility mainly through the precipitation of high number densities of nanoscale NiAl precipitates as characterized by atom probe tomography. The precipitation parameters are tuned by optimizing both alloy compositions and heat-treatment parameters. The strengthening effects of nanoscale NiAl and Mo/W-rich carbides are quantitatively analyzed and assessed. (C) 2014 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：45 / 48

页数：4

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