为研究铝基复合材料中新发现的以熔化为主要特征的相变带，采用分离式霍普金森压杆（SHPB）和光学显微镜（OM）、扫描电镜（SEM）等研究了不同应变速率（7×10^-4~2×10³s^-1）下55%TiB₂颗粒增强铝基复合材料中绝热剪切带的组织特征。结果表明：在（1~2）×10³s^-1的高应变速率下，在与加载方向呈45°的剪切面上存在熔融铝带或熔融铝球团聚区，即相变带；相变带的形成与绝热温升有关，在绝热温升的作用下基体合金于高温下熔化，急冷后形成了相变带；试验用铝基复合材料的绝热剪切失效主要受热软化效应的控制。

所属栏目

材料性能及应用广东省自然科学基金资助项目（2015A030313668）；广东省科技计划项目（2016A010103006）；东莞市产学研合作项目（2015509102214）

收稿日期

2015/12/292017/1/20

作者单位

郑振兴:广东技术师范学院机电工程系, 广州 510665
朱德智:华南理工大学机械与汽车工程学院, 广州 510640

备注

郑振兴(1975-),男,福建福州人,副教授,博士.

引用该论文:

ZHENG Zhen-xing,ZHU De-zhi.Microstructure Characteristic of Adiabatic Shear Band in 55vol% TiB₂ Particles Reinforced Aluminum Matrix Composite at High Strain Rates[J].Materials for mechancial engineering,2017,41(4):84～88
郑振兴,朱德智.高应变速率下55%TiB₂颗粒增强铝基复合材料绝热剪切带的组织特征[J].机械工程材料,2017,41(4):84～88

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