Effect of Rare Earth Y and Heat Treatment on Microstructure and Properties of 6016 Aluminum Alloy
LU Bo1, LI Anmin1,2,3, RAO Yu1, WANG Linzhong1, ZUO Tianchen1, HU Yang1
1 College of Resources, Environment and Materials,Guangxi University, Nanning 530004, China 2 Center of Ecological Collaborative Innovation for Aluminum Industry in Guangxi, Nanning 530004, China 3 Guangxi Key Laboratory of Processing for Non-ferrous Metal and Featured Materials,Guangxi University, Nanning 530004, China
Abstract: In order to improve the performance of 6016 aluminum alloy, the effects of the rare earth Y and the heat treatment process on the microstructure and tensile properties of 6016 aluminum alloy were studied by means of OM, SEM, XRD, TEM and EBSD. The results show that with the addition of Y, the grain of 6016 aluminum alloy is obviously refined, and the grain distribution tends to be uniform. When the addition of Y is 0.35wt%, the grain refinement effect, strength and elongation of the alloy reach the best value. However, when the element Y is added too much, the mechanical properties are reduced under the same heat treatments condition. Element Y mainly exists in the form of Al3Y and AlFeSiY compounds at the grain boundary, helping the nucleation rate of recrystallization increase, which is conducive to the development of small-angle boundary towards big-angle interface, and has a positive effect on the recrystallization process of alloy. 6016 aluminum alloy has good paint hardening. The tensile strength and yield strength of the alloy with 0.35wt%Y element are up to 320 MPa and 270 MPa after simulated paint baking for 6 h. Compared with its T4p state, the tensile strength is improved by 68 MPa and the yield strength is improved by 116 MPa.
作者简介: 卢博,广西大学硕士研究生。2018年6月,在湖北工程学院化学与材料科学学院获得材料化学工学学士学位。主要研究方向为铝合金的强韧化、高熵合金。 李安敏,广西大学资源环境与材料学院副教授、硕士研究生导师。1995年7月本科毕业于武汉科技大学材料系,2010年6月在广西大学结构工程专业取得博士学位。主要从事高熵合金、铝合金的强韧化、复合材料的研究工作。近年来,在高熵合金、铝合金、复合材料等领域发表论文30余篇,包括Journal of Materials Engineering and Performance、Acta Metallurgica Sinica、Journal of Electronic Materials等。
引用本文:
卢博, 李安敏, 饶宇, 汪林忠, 左天辰, 胡杨. 稀土Y及热处理对6016铝合金组织与性能的影响[J]. 材料导报, 2022, 36(19): 21070110-8.
LU Bo, LI Anmin, RAO Yu, WANG Linzhong, ZUO Tianchen, HU Yang. Effect of Rare Earth Y and Heat Treatment on Microstructure and Properties of 6016 Aluminum Alloy. Materials Reports, 2022, 36(19): 21070110-8.
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2022, Vol. 36 
