Reviews on the Study of Aluminum Alloys and Aluminum Matrix Composites with High-temperature Anti-creep Behavior
SUN Ming1, ZHUANG Jingwei2, DENG Hailiang1,*, CHEN Ziyang1, SI Songhua1, ZHANG Ruimin2
1 Key Laboratory of Green Fabrication and Surface Technology of Advanced Metal Materials (Anhui Univversity of Technology), Ministry of Education, Ma’anshan 243002, China; 2 Shenzhen Altech Novel Alloy Co., Ltd., Shenzhen 518000, China;
Abstract: Creep phenomenon is easily generated at high temperatures for aluminum alloys used as structural and conductor materials, which is further deteriorated with an increase of working time. Structural damage of aluminum alloys is even caused by creep, leading to a catastrophic fai-lure. Therefore, efficient improvement in the creep resistance is crucial for aluminum alloys applied in the environments with high temperatures and loads to keep their excellent properties. So far, rare earth treatment, alloying treatment, and adding of reinforcement are the methods to improve the creep resistance of aluminum alloys. The purpose is to refine alloy grains and precipitate high thermal-stability phases that are dispersed in the interior of grains and in grain boundaries. The mechanisms include fine grain strengthening, precipitation hardening, dispersion strengthening, and direct strengthening. These strengthening effects inhibit the glide of dislocations formed in crystal grains and sliding of crystal boundaries, resulting in an evident decrease of steady-state creep rate thereby improving the creep resistance. Others studies have focused on establishing the relatio-nal models between the creep properties and the creep conditions, microstructure and precipitates of aluminum alloys to predict the creep behavior and service life. The models can provide theoretical data which are favorable to the design of aluminum alloys and aluminum matrix composites showing excellent creep resistance at high temperatures. This paper analyzes the creep behavior of aluminum alloys firstly. Focusing on the high-temperature creep mechanisms such as diffusion creep, grain boundary slip, and dislocation creep, the research progresses of anti-creep aluminum alloys and aluminum matrix composites are summarized according to the items of rare earth micro-alloying, multielement micro-alloying, and composite strengthening, etc. The improving mechanisms on high-temperature creep properties are simultaneously revealed. The studies on the establishment of creep theoretical models and prediction of creep life are also reviewed. The challenges and developments of anti-creep aluminum alloys and aluminum matrix composites are finally proposed basing on the above reviews.
作者简介: 孙茗,2018年6月毕业于河北工程大学,获得工学学士学位。现为安徽工业大学材料科学与工程学院硕士研究生,在邓海亮教授的指导下进行研究。目前主要研究领域为铝基复合材料。邓海亮,安徽工业大学材料科学与工程学院教授、博士研究生导师。2012年5月在西北工业大学材料学专业取得博士学位,2012—2017年在西安航天复合材料研究所从事超高温复合材料及其航空航天应用研究。主要研究领域为复合材料。近年来,在复合材料领域发表论文40余篇,包括Carbon、Materials Science and Engineering A、Journal of the European Ceramic Society、Tribology International、Wear和《新型炭材料》等。
引用本文:
孙茗, 庄景巍, 邓海亮, 陈子洋, 斯松华, 张瑞敏. 高温抗蠕变铝合金及铝基复合材料研究进展[J]. 材料导报, 2021, 35(11): 11137-11144.
SUN Ming, ZHUANG Jingwei, DENG Hailiang, CHEN Ziyang, SI Songhua, ZHANG Ruimin. Reviews on the Study of Aluminum Alloys and Aluminum Matrix Composites with High-temperature Anti-creep Behavior. Materials Reports, 2021, 35(11): 11137-11144.