Effects of heat treatment parameters on the microstructure and mechanical properties of in situ TiBw/Ti6Al4V composite with a network architecture

被引：44

作者：

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

Xu, H. Y. ^{[1
]}

Wang, B. ^{[1
]}

Zhang, Y. Z. ^{[1
]}

Geng, L. ^{[1
]}

机构：

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

来源：

MATERIALS & DESIGN | 2012年 / 36卷

基金：

中国国家自然科学基金; 中国博士后科学基金;

关键词：

Composites; Heat treatments; Mechanical properties; MATRIX COMPOSITES; TIB; TEMPERATURE; REINFORCEMENT;

D O I：

10.1016/j.matdes.2011.12.021

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In situ 5 vol.% TiB whiskers reinforced Ti6Al4V (TiBw/Ti64) composites with a network architecture were heat treated with different parameters in order to further improve their mechanical properties. The microstructure results showed that the fraction of the transformed beta phase in the matrix increases with increasing quenching temperatures, which leads to a significant improvement in strength at room and high temperatures. Both the size and fraction of fine alpha + beta phases transformed from martensite phase increase with increasing aging temperatures, which decreases the strength of the composite. When the testing temperature is lower than 600 degrees C, the strength of the 5 vol.% TiBw/Ti64 composite is significantly enhanced by heat treatment consisting of water quenching and aging processes with proper parameters. This can be attributed to the superior heat treatment strengthening effect on the basis of the network boundary strengthening effect. Crown Copyright (C) 2011 Published by Elsevier Ltd. All rights reserved.

引用

页码：694 / 698

页数：5

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