Controllable κ-carbide precipitation enables strength-ductility co-enhancement in Fe-Mn-Al-C low-density austenitic steel via grain boundary engineering

被引：0
作者：
Du, J. H. [1 ]
Chen, P. [1 ]
Zhang, F. [1 ]
Jia, Z. P. [1 ]
Shi, F. [1 ]
Li, X. W. [1 ]
机构：
[1] Northeastern Univ, Sch Mat Sci & Engn, Dept Mat Phys & Chem, Minist Educ, Shenyang 110819, Peoples R China
来源：
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY | 2025年 / 227卷
基金：
中国国家自然科学基金;
关键词：
ELECTRON BACKSCATTER DIFFRACTION; CENTERED-CUBIC METALS; CHARACTER-DISTRIBUTION; MECHANICAL-PROPERTIES; INDUCED PLASTICITY; STAINLESS-STEEL; CYCLE FATIGUE; ATOM-PROBE; DEFORMATION; ALLOY;
D O I：
10.1016/j.jmst.2024.10.057
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The influence of grain boundary engineering (GBE) on the precipitation behavior of κ-carbides and consequently mechanical properties of low-density Fe-30.5Mn-8Al-1C (wt.%) austenitic steel was experimentally investigated. The GBE treatments effectively introduce a large number of special boundaries (SBs). The intergranular κ-carbide precipitation was obviously inhibited during the subsequent aging treatment while maintaining more intragranular κ-carbides. The suppression of intergranular precipitation enhances the solid solution strengthening and precipitation strengthening effects, and the increased fraction of SBs improves the uniformity of plastic deformation. Consequently, GBE treatment can availably optimize the κ-carbide precipitation in Fe-Mn-Al-C alloys, thus facilitating a synchronous enhancement in strength and ductility. © 2025
引用
收藏
页码：26 / 31
页数：6
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