Novel in-situ Ti-based dendrite/nanostructured matrix composites with excellent mechanical performances upon dynamic compression

被引：2
|
作者：
Dong, J. L. [1 ]
Wang, Z. [1 ]
Han, L. N. [1 ]
Tang, Y. L. [1 ]
Qiao, J. W. [1 ]
Shi, X. H. [1 ]
Wang, Z. H. [3 ]
Wu, Y. C. [1 ,2 ]
机构：
[1] Taiyuan Univ Technol, Coll Mat Sci & Engn, Taiyuan 030024, Shanxi, Peoples R China
[2] Taiyuan Univ Technol, Minist Educ, Key Lab Interface Sci & Engn Adv Mat, Taiyuan 030024, Shanxi, Peoples R China
[3] Taiyuan Univ Technol, Inst Appl Mech & Biomed Engn, Taiyuan 030024, Shanxi, Peoples R China
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2019年 / 781卷
基金：
中国国家自然科学基金;
关键词：
Dendrite; Nanostructured matrix composites; Dynamic compression; Plastic deformation; J-C model; NANOSTRUCTURE-DENDRITE COMPOSITE; METALLIC-GLASS COMPOSITE; STRAIN-RATE; DEFORMATION BEHAVIORS; SHEAR BANDS; TEMPERATURE RISE; FLOW BEHAVIOR; JOHNSON-COOK; GRAIN-GROWTH; PLASTIC-FLOW;
D O I：
10.1016/j.jallcom.2018.11.315
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Quasi-static and dynamic compression were conducted on a new Ti-based dendrite/nanostructured matrix composite with an atomic composition of Ti58Zr12Ni6Nb13Be11. The composites exhibit high yielding strength of similar to 1100 MPa, together with a considerable plasticity of 50% upon quasi-static compression at room temperature. Upon high-speed dynamic compression, a large plasticity of similar to 15% can be obtained due to plasticity accommodation by abundant dislocations and profuse shear bands. A constitutive relationship is established by Johnson-Cook model, which is employed to predict the plastic flow behavior. (C) 2018 Elsevier B.V. All rights reserved.
引用
收藏
页码：716 / 722
页数：7
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