Simultaneously achieving strength and ductility in Ni3Al nanowires with superlattice intrinsic stacking faults

被引：16

作者：

Zhang, Zhiwei ^{[1
,2
]}

Fu, Qiang ^{[3
]}

Wang, Jun ^{[1
]}

Yang, Rong ^{[1
]}

Xiao, Pan ^{[1
]}

Ke, Fujiu ^{[4
]}

Lu, Chunsheng ^{[5
]}

机构：

[1] Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech LNM, Beijing 100190, Peoples R China

[2] Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China

[3] Aero Engine Acad China, Beijing 101304, Peoples R China

[4] Beihang Univ, Sch Phys, Beijing 100191, Peoples R China

[5] Curtin Univ, Sch Civil & Mech Engn, Perth, WA 6845, Australia

来源：

INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES | 2022年 / 215卷

基金：

中国国家自然科学基金;

关键词：

Ni3Al; Stacking faults; Strengthening; Ductility; Molecular dynamics; ULTRAHIGH-STRENGTH; MAXIMUM STRENGTH; YIELD STRENGTH; DEFORMATION; ENERGIES; INSIGHTS; ALLOYS;

D O I：

10.1016/j.ijmecsci.2021.106953

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

Simultaneously improving strength and ductility has been an attractive theme in materials science and engineering. Through designing nanostructures, it is possible to overcome the traditional trade-off between ductility and strength of materials. In this paper, we show that introducing superlattice intrinsic stacking faults in nickel aluminide (Ni3Al) can facilitate its strength and toughness. In comparison with twin boundaries, the enhancing effect of superlattice intrinsic stacking faults is more obvious. Most significantly, the yield strength of samples with superlattice intrinsic stacking faults is always superior to their single crystalline counterparts, indicating that the yield strength of single crystalline Ni3Al can be exceeded. These findings provide new insights into the nanostructural design of aerospace materials.

引用

页数：11

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