A possibility to synchronously improve the high-temperature strength and ductility in face-centered cubic metals through grain boundary engineering

被引：47
|
作者：
Guan, X. J. [1 ]
Shi, F. [1 ]
Ji, H. M. [1 ]
Li, X. W. [1 ,2 ]
机构：
[1] Northeastern Univ, Sch Mat Sci & Engn, Dept Mat Phys & Chem, Minist Educ,Key Lab Anisotropy & Texture Mat, Shenyang 110819, Peoples R China
[2] Northeastern Univ, State Key Lab Rolling & Automat, Shenyang 110819, Peoples R China
来源：
SCRIPTA MATERIALIA | 2020年 / 187卷
基金：
中国国家自然科学基金;
关键词：
Cu-Al alloy; Grain boundary engineering; High temperature; Strength-ductility match; Dynamic recrystallization; INTERGRANULAR CORROSION-RESISTANCE; AUSTENITIC STAINLESS-STEEL; HOT DEFORMATION-BEHAVIOR; STACKING-FAULT ENERGIES; CU-MN ALLOYS; STRAIN-RATE; PRECIPITATION BEHAVIORS; CHARACTER-DISTRIBUTION; MECHANICAL-PROPERTIES; DEPENDENCE;
D O I：
10.1016/j.scriptamat.2020.06.026
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
To examine the influence of grain boundary engineering (GBE) on the high-temperature mechanical properties of face-centered cubic (FCC) metals, the tensile tests were carried out at 723 K on the non-GBE and GBE Cu-16at.%Al alloy samples. The GBE treatment increases the deformation uniformity and cracking resistance, thus effectively improves the high-temperature ductility. Moreover, the dynamic recrystallization (DRX) of the GBE sample is significantly suppressed due to the reduction of the Gibbs free energy, impeding the high-temperature softening. Therefore, the high-temperature strength and ductility of FCC metals might be synchronously improved by a GBE treatment under the premise that DRX occurs. (C) 2020 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：216 / 220
页数：5
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