Tensile deformation mechanisms of an in-situ Ti-based metallic glass matrix composite at cryogenic temperature

被引：15

作者：

Bai, J. ^{[1
,2
]}

Li, J. S. ^{[1
]}

Qiao, J. W. ^{[3
]}

Wang, J. ^{[1
]}

Feng, R. ^{[2
]}

Kou, H. C. ^{[1
]}

Liaw, P. K. ^{[2
]}

机构：

[1] Northwestern Polytech Univ, State Key Lab Solidificat Proc, Xian 710072, Peoples R China

[2] Univ Tennessee, Dept Mat Sci & Engn, Knoxville, TN 37996 USA

[3] Taiyuan Univ Technol, Lab Appl Phys & Mech Adv Mat, Taiyuan 030024, Peoples R China

来源：

SCIENTIFIC REPORTS | 2016年 / 6卷

基金：

美国国家科学基金会; 中国国家自然科学基金;

关键词：

PLASTICITY; STRENGTH; BEHAVIOR; MICROSTRUCTURE; DUCTILITY;

D O I：

10.1038/srep32287

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Remarkable tensile ductility was first obtained in an in-situ Ti-based bulk metallic glass (BMG) composite at cryogenic temperature (77 K). The novel cryogenic tensile plasticity is related to the effective accommodation of ductile body-centered cubic dendrites at 77 K, characteristic of the prevailing slip bands and dislocations, as well as lattice disorder, which can effectively hinder the propagation of critical shear bands. The greatly increased yield strength of dendrites contributes to the high yield strength of composite at 77 K. A trend of stronger softening is observed at low temperature, and a criterion is proposed to understand the softening behavior. The current research could also provide a guidance to the promising cryogenic application of these new advanced BMG composites.

引用

页数：7

共 50 条

[1] Tensile deformation mechanisms of an in-situ Ti-based metallic glass matrix composite at cryogenic temperature
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[J]. Scientific Reports, 6
[2] Dynamic Deformation Behaviors of an In Situ Ti-Based Metallic Glass Matrix Composite
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