Dislocation ordering and texture strengthening of naturally aged Al-Cu-Mg alloy

作     者：F.Liu Z.Y.Liu G.Y.He L.N.Ou F.Liu;Z.Y.Liu;G.Y.He;L.N.Ou

作者机构：School of Materials Science and EngineeringCentral South UniversityChangsha 410083China Key Laboratory of Nonferrous Metal Materials Science and EngineeringMinistry of EducationCentral South UniversityChangsha 410083China National Key Laboratory of Science and Technology on High-Strength Structural MaterialsCentral South UniversityChangsha 410083China 

出 版 物：《Journal of Materials Science & Technology》 (材料科学技术（英文版）)

年 卷 期：2022年第118卷第23期

页      面：1-14页

核心收录：

学科分类：08[工学] 0806[工学-冶金工程] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：financially sponsored by the National Natural Science Foundation of China (No. 51171209) the National Key Research and Development Program of China (No. 2016YFB0300900) the National Key Fundamental Research Project of China (No.2012CB619506-3)。 

主　　题：Al-Cu-Mg alloy Dislocation ordering Goss texture Grain structure stability Texture strengthening 

摘      要：Stability of grain structure,dislocation ordering and strengthening mechanisms of the naturally aged AlCu-Mg alloy after solution treatment are investigated by using optical microscope(OM),scanning electron microscope(SEM),electron back-scattered diffraction(EBSD),X-ray diffraction(XRD) and transmission electron microscope(TEM).Results show that {100},{100},{110} and {110}slip systems can be activated after solution treatment,which can promote the formation of {110}Goss texture.The combination effect of T-Al_(20)Cu_(2) Mn_(3) phase and Goss-oriented grains with large Taylor factor makes the solution-treated alloys display excellent stability of grain structure.The enhanced yield strength of the alloy is ascribed to grain-refine strengthening,dispersed particles strengthening,dislocation strengthening and texture strengthening.The coarsening of the second phase is responsible for softening of the alloy after annealing at 400 ℃+solution treatment at 475 ℃.