Evolution of microstructure and tensile properties of in situ titanium matrix composites with volume fraction of (TiB plus TiC) reinforcements

被引：112

作者：

Zhang, C. J. ^{[1
]}

Kong, F. T. ^{[1
]}

Xiao, S. L. ^{[1
]}

Zhao, E. T. ^{[1
]}

Xu, L. J. ^{[1
]}

Chen, Y. Y. ^{[1
]}

机构：

[1] Harbin Inst Technol, Natl Key Lab Sci & Technol Precis Heat Proc Met, Harbin 150001, Peoples R China

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2012年 / 548卷

基金：

中国国家自然科学基金;

关键词：

Titanium matrix composite; Microstructure; Mechanical properties; TiB whiskers; TiC particles; TRACE BORON ADDITION; MECHANICAL-PROPERTIES; FRACTURE-BEHAVIOR; CARBON ADDITIONS; ALLOYS; TEMPERATURE; TI-6AL-4V; DEFORMATION;

D O I：

10.1016/j.msea.2012.04.004

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

In this paper, high temperature titanium matrix composites with different volume fraction of (TiB+TiC) reinforcements were in situ synthesized by casting route. The microstructure and tensile properties of the composites were presented and discussed. The results reveal that both the TiB whiskers and TiC particles tend to segregate at prior beta boundaries. The prior beta grain size and alpha lath width are gradually refined with increasing volume fraction of reinforcements. Evolution of tensile properties shows that enhancement in yield strength and ultimate tensile strength with addition of reinforcements is primarily attributed to microstructural refinement, while the remarkable reduction in ductility is possibly due to the cracking of TiB whiskers and TiC particles. (C) 2012 Elsevier B.V. All rights reserved.

引用

页码：152 / 160

页数：9

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