原位颗粒增强钛基复合材料高温流变行为

doi:10.13229/j.cnki.jdxbgxb201604027

吉林大学学报(工学版) ›› 2016, Vol. 46 ›› Issue (4): 1197-1201.doi: 10.13229/j.cnki.jdxbgxb201604027

原位颗粒增强钛基复合材料高温流变行为

刘利萍^{1, 2}, 刘勇兵¹, 姬连峰¹, 曹占义¹, 杨晓红¹

1.吉林大学材料科学与工程学院,长春 130022;
2.长春职业技术学院工程技术分院,长春 130033

收稿日期:2015-08-17 出版日期:2016-07-20 发布日期:2016-07-20
通讯作者: 杨晓红(1966-),女,研究员,博士.研究方向:汽车轻金属材料.E-mail:xhyang@jlu.edu.cn
作者简介:刘利萍(1979-),女,博士研究生.研究方向:有色金属材料的制备、微结构与性能.E-mail:look_see@163.com
基金资助:
吉林省自然科学基金项目(201215026)

Flow stress behavior of in situ particulate reinforced titanium atrix composite at elevated temperature

LIU Li-ping^{1, 2}, LIU Yong-bing¹, JI Lian-feng¹, CAO Zhan-yi¹, YANG Xiao-hong¹

1.College of Materials Science and Engineering, Jilin University, Changchun 130022, China;
2.Department of Engineering and Technology, Changchun Vocational Institute of Technology, Changchun 130033, China

Received:2015-08-17 Online:2016-07-20 Published:2016-07-20

摘要/Abstract

摘要： 通过等温热压缩实验,研究了原位合成TiB和TiC增强Ti基复合材料在550°C~750°C、0.0001 s^-1~0.0004 s^-1应变速率条件下的高温流变行为。结果表明:该复合材料在高温塑性变形时,压缩流变应力随变形温度的提高而降低,随应变速率的提高而提高;材料的软化机制以动态回复为主,动态再结晶为辅;利用Arrhenius方程模型结合Zener-Hollomon修正参数计算出材料的热变形参数,建立了双曲正弦形式的本构方程。

关键词: 复合材料, 本构方程, 热压缩实验, 流变应力行为

Abstract: The flow stress behavior of an in situ synthesized TiB and TiC reinforced Ti matrix composite was studied by isothermal hot compression tests with temperature ranging from 550 ℃ to 750 ℃ and strain rate from 0.0001 s^-1 to 0.0004 s^-1. Results show that the flow stress decreases with the increase in temperature, and increases with the increase in strain rate. The softening mechanism during the hot deformation is mainly determined by dynamic recovery with the support of dynamic recrystallization. The constitutive parameters of the composite were calculated on the basis of Arrhenius model and Zener-Hollomon parameter, and the constitutive equation in hyperbolic form was established.

Key words: composite materials, constitutive equation, hot compression test, flow stress behavior

中图分类号:

TG115

刘利萍, 刘勇兵, 姬连峰, 曹占义, 杨晓红. 原位颗粒增强钛基复合材料高温流变行为[J]. 吉林大学学报(工学版), 2016, 46(4): 1197-1201.

LIU Li-ping, LIU Yong-bing, JI Lian-feng, CAO Zhan-yi, YANG Xiao-hong. Flow stress behavior of in situ particulate reinforced titanium atrix composite at elevated temperature[J]. 吉林大学学报(工学版), 2016, 46(4): 1197-1201.

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原位颗粒增强钛基复合材料高温流变行为

Flow stress behavior of in situ particulate reinforced titanium atrix composite at elevated temperature

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