Effect of applied pressure and ultrasonic vibration on microstructure and microhardness of Al-5.0Cu alloy  

压力和超声耦合作用对Al-5.0Cu合金凝固组织和硬度的影响（英文）

作　　者：张杨[1] 李风雷[1] 罗执 赵愈亮 夏伟[1] 张卫文[1] 

机构地区：[1]华南理工大学机械与汽车工程学院,广州510640

出　　处：《Transactions of Nonferrous Metals Society of China》2016年第9期2296-2303,共8页中国有色金属学报（英文版）

基　　金：Project(51374110)supported by the National Natural Science Foundation of China;Project(2015A030312003)supported by the Natural Science Foundation of Guangdong Province for Research Team,China

摘　　要：The squeeze pressure field and power ultrasonic field were applied during the conventional casting process of Al-5.0Cu alloy simultaneously. The effects of individual squeeze pressure or power ultrasonic and their coupling on the microstructures and microhardness of Al-5.0Cu alloy were studied by optical microscopy, scanning electron microscopy, image analysis and micro Vickers hardness test. The results show that compared with the conventional casting, refined microstructures, homogeneous distribution of α（Al） and θ（Al2Cu） and improved microhardness can be obtained when squeeze pressure or power ultrasonic is applied individually. For the case of combined fields, both the treated region and the improvement of microstructure and properties can be enhanced.在Al-5.0Cu合金的凝固过程中同时施加压力和功率超声,在此基础上采用光学显微镜、扫描电镜、定量金相分析以及显微硬度测试仪分别研究单独施加压力、超声及二者的耦合作用对合金凝固组织和显微硬度的影响。结果表明:外场(单一压力或功率超声)的施加可以改善α(Al)和θ(Al_2Cu)相的形貌以及分布,同时提高合金的硬度;相对于单一场,耦合场改善显微组织和提升性能的效果更加明显,且其有效作用区域更广。

关 键 词：Al-Cu alloy squeeze pressure field power ultrasonic field combined field MICROSTRUCTURE MICROHARDNESS 

分 类 号：TG292[金属学及工艺—铸造]