文献类型：期刊文献

英文题名：Effects of stirring friction on the microstructure, texture and mechanical properties of 7055 aluminum alloy

作者：Long, Shao-lei Pan, Sheng-shan Yang, Ming Luo, Xiang-lan Ling, Min Gui, Qin Yi, Yian-liang

通信作者：Yi, YL[1];Yang, M[2]

机构：[1]Guizhou Inst Technol, Sch Mat & Energy, Guizhou 550003, Guiyang, Peoples R China;[2]Jinan Univ, Inst Adv Wear & Corros Resistant & Funct Mat, Guangzhou 510632, Guangdong, Peoples R China;[3]Guizhou Univ, Coll Mat & Met, Guizhou 550003, Guiyang, Peoples R China;[4]Guizhou Normal Univ, Sch Mat & Architectural Engn, Guizhou 550018, Guiyang, Peoples R China

第一机构：贵州理工学院

通信机构：corresponding author), Jinan Univ, Inst Adv Wear & Corros Resistant & Funct Mat, Guangzhou 510632, Guangdong, Peoples R China;corresponding author), Guizhou Univ, Coll Mat & Met, Guizhou 550003, Guiyang, Peoples R China.

年份：2024

卷号：33

起止页码：5413-5424

外文期刊名：JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T

收录：;EI(收录号：20244317264396);Scopus(收录号：2-s2.0-85206993965);WOS:【SCI-EXPANDED(收录号:WOS:001345255100001)】；

基金：The research carried out in this work was financially supported by the Natural Science Foundation of Guizhou Province, China (Grant No. ZK [2024] General 516) , Commercialization of Scientific and Techno-logical Achievements Program of Guizhou Province, China (Grant No, LH [2024] Major021) , National Natural Science Foundation of China (Grant Nos. 52005217 and 52464049) , University Research Platform and Research Projects of Guangdong Education Department (Grant No. 2022ZDZX3003) , and Guangzhou Science and technology planning project (Grant No. 2024A04J4063) . The authors do not have any possible conflicts of interest.

语种：英文

外文关键词：7055 aluminum alloy; Friction stir; Microstructure; Texture; Schmid law

摘要：Aluminum alloys are widely used in aerospace, transportation, and many other fields due to their excellent properties such as lightweight, ultra-strength, and high toughness. This paper analyzed the influence mechanism of friction stir on the microstructure, texture, and mechanical properties to realize the strength and toughness of 7055 aluminum alloys and optimize their deformation process. The results show that the aluminum alloys change from uneven banded grains to uniform and fine equiaxed grains after friction stir processing, and the grain size is refined from 14 mu m to 0.71 mu m. The high-angle grain boundary and texture intensity present an initial increase but a subsequent decrease due to the combined effect of recrystallization and high-temperature softening caused by the heat input of friction stir processing. The total texture intensity and volume fraction of the friction stir processed aluminum alloys decrease significantly, and the intensity of RtG {110} <110>, A {110} <111>, E {110} <111>, and F {111} <112> texture significantly decrease or disappear, while the Brass (B) {110} <112> texture increases. The yield strength of FSP aluminum alloys decreases with increasing heat input (w/v), which mainly depends on the weakening of the texture strengthening effect. However, the increase of geometrically necessary dislocations (GND) caused by grain boundary sliding leads to the significant improvement of the deformation hardening ability and plasticity of the material. In addition, the effect of texture on the plasticity of aluminum alloys was calculated by using Schmid law. It is found that the equivalent slip factor (ESF) and maximum Schmid factor (mu(max)) of A, E, and Cu textures are equal to 0. The small ESF and mu(max) of the S texture are not conducive to the plastic deformation property of materials, while the 1000 x 70 sample with more ESF (8) and mu(max) (0.41) of the Cube texture ({001} <100>) shows better plasticity.