TiC颗粒强化钛基复合材料的高温拉伸特性  

Tensile Properties of TiC-Particulate-Reinforced Ti Matrix Composites at Elevated Temperature

作　　者：张廷杰[1] 曾泉浦[1] 毛小南[1] 张小明[1] 曾立英[1] 戚玉莲[1] 

机构地区：[1]西北有色金属研究院,西安710016

出　　处：《稀有金属材料与工程》2001年第2期85-88,共4页Rare Metal Materials and Engineering

基　　金："九五"攻关项目(计国防95-YS-002)

摘　　要：用预处理熔铸工艺制备的ＴｉＣ颗粒增强钛基复合材料的室温和３００℃～７００℃拉伸性能测量表明：复合材料相应于未复合基体合金的强度增量在室温达到２４％，而到６５０℃降为４％，表明复合材料的显微组织有利于室温和低于 ６５０℃的中等温度强化； ４００℃～５００ ℃时出现动态应变时效，但延性并未明显下降，意味着 ＰＴＭＰ工艺制成的 ＴｉＣ／Ｔｉ复合材料间隙元素含量低； ３００ ℃～５００ ℃下加工硬化明显增加，可能与复合体中位错密度增加有关。The tensile properties of TiC-particulate-reinforced Ti metal matrix composite(MMC) produced by pre-treatment melting process (PTMP) have been determined at room temperature and 300 degreesC similar to 650 degreesC. It was found that relative strength increment of the Ti matrix composite is the greatest at room temperature (up to 24%) and decreases with increasing temperature(just 4% at 650 degreesC), which means that the microstructure of this composite is favorable for strengthening at lower than 650 degreesC. Dynamic strain aging occurred at 400 degreesC similar to 500 degreesC, but elongation did not decrease so much, which means that the contents of interstitial impurities are low for the composite produced by PTMP. The increase in work hardening at 300 degreesC similar to 500 degreesC may be relate to high dislocation density in composite.

关 键 词：颗粒增强 钛基 复合材料 高温拉伸 显微组织 碳化钛 

分 类 号：TB331[一般工业技术—材料科学与工程]