Effects of T6I6 Treatment on the Precipitation and Fatigue Behaviour of Al-Si-Mg-Cu Cast Aluminum Alloy
CHEN Yuqiang1, ZHANG Wentao1, ZHANG Hao1, PAN Suping2, LI Yunxiang3, LI Ningbo3, OU Chengui3, FU Mingzhu1, YANG Mingguang1
1 Key Laboratory of High Temperature Wear Resistant Materials Preparation Technology of Hunan Province, Hunan University of Science and Technology, Xiangtan 411201, China 2 Advanced Research Center, Central South University, Changsha 410083, China 3 Hunan Runtai New Energy Science and Technology Ltd., Xiangxiang 411400, China
Abstract: The effects of T6I6 treatment on the precipitation and fatigue behaviour of Al-Si-Mg-Cu cast aluminum alloy were investigated by using hardness test, mechanical tensile test, fatigue test and transmission electron microscopy (TEM). The results show that the main strengthening-phases of the T6 peak-aged and T6I6 peak-aged alloy were GP zone and β″ precipitates. Compared with T6 peak-aged alloy, the yield strength and tensile strength of the T6I6 peak-aged alloy increased by 7.3 MPa and 11.5 MPa, respectively, and its elongation also increased by 4.1%. In addition, under the same loading condition, the T6I6 peak-aged alloy exhibited a longer fatigue life. At the maximum stress of 175 MPa, the fatigue life of the T6I6 peak-aged alloy was enhanced by 63.0% compared with that of T6 peak-aged alloy.
作者简介: 陈宇强,男,博士,副教授,湖南科技大学材料科学与工程学院副院长,主要研究方向为铝合金加工工艺与性能、损伤机理以及微结构表征。入选湖湘青年英才支持计划、湖南省青年骨干教师、湖南省科技创新创业菁英培育计划。主持国家自然科学基金、湖南省创新创业技术投资专项、湘潭市科技创新“四个十”重大科技专项、校企合作科研项目、产学研成果转化项目等科研项目7项,获得湖南省自然科学奖三等奖一项,在Materials Science and Engineering A、Journal of Alloys and Compounds等学术刊物发表学术论文40余篇,获得授权专利10余项,软件注册权8项,担任Journal of Alloys and Compounds、Micro & Nano Letters等期刊审稿人。
引用本文:
陈宇强, 张文涛, 张浩, 潘素平, 李运湘, 李宁波, 欧陈贵, 伏明珠, 阳铭广. T6I6处理对Al-Si-Mg-Cu铸铝时效析出及疲劳行为的影响[J]. 材料导报, 2020, 34(14): 14122-14128.
CHEN Yuqiang, ZHANG Wentao, ZHANG Hao, PAN Suping, LI Yunxiang, LI Ningbo, OU Chengui, FU Mingzhu, YANG Mingguang. Effects of T6I6 Treatment on the Precipitation and Fatigue Behaviour of Al-Si-Mg-Cu Cast Aluminum Alloy. Materials Reports, 2020, 34(14): 14122-14128.
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