临界变形量下2024铝合金板材在固溶过程中的晶粒粗化及力学性能  

Grain coarsening and mechanical properties of 2024 aluminum alloy sheet with critical deformation during solid solution process

作　　者：邹康鑫 崔霞[1] 朱彬 张锰 黄梅 杨超 曾祥 桂中玮 欧阳德来[1] ZOU Kang-xin;CUI Xia;ZHU Bin;ZHANG Meng;HUANG Mei;YANG Chao;ZENG Xiang;GUI Zhong-wei;OUYANG De-lai(School of Materials and Engineering,Nanchang Hangkong University,Nanchang 330063,China;AVIC Xi′an Aircraft Industry Group Co.,Ltd.,Xi′an 710089,China;State Grid Jiangxi Electric Power Research Institute,Nanchang 330096,China;Jiujiang Power Supply Branch of State Grid Jiangxi Electric Power Co.,Ltd.,Jiujiang 332000,China)

机构地区：[1]南昌航空大学材料科学与工程学院,江西南昌330063 [2]中航西安飞机工业集团股份有限公司,陕西西安710089 [3]国网江西省电力有限公司电力科学研究院,江西南昌330096 [4]国网江西省电力有限公司九江供电分公司,江西九江332000

出　　处：《塑性工程学报》2024年第11期177-185,共9页Journal of Plasticity Engineering

基　　金：江西省自然科学基金资助项目(20242BAB25216)。

摘　　要：研究了2024铝合金板材晶粒粗化的临界变形量,探讨了预变形量对合金织构及力学性能的影响。结果表明,合金晶粒粗化预变形量为6%,未粗化晶粒尺寸为29μm,粗化晶粒尺寸可达2839μm。固溶时效后合金主要存在Cube{100}<001>、Goss{110}<001>、Brass{110}<112>、Copper{112}<111>和S{123}<634>织构,随着预变形量的增加,Copper{112}<111>织构向Cube{100}<001>织构转变,形成以Cube{100}<001>织构为主的再结晶织构。晶粒粗化后强度和塑性显著降低,预变形量为8%时比未预变形的屈服强度降低38 MPa,伸长率下降到16.36%。随预变形量的增加,断口特征由韧性断裂向解理断裂特征转变。The critical deformation of grain coarsening of 2024 aluminum alloy sheet was investigated,and the influence of the pre-deformation on the texture and mechanical properties was discussed.The results show that the pre-deformation of grain coarsening is 6%,The un-coarsened grain size is 29μm,and the coarsened grain size is 2839μm.Cube{100}<001>,Goss{110}<001>,Brass{110}<112>,Copper{112}<111>and S{123}<634>textures after solid solution aging are existed in alloy.With the increase of the pre-deformation,the Copper{112}<111>texture changes to Cube{100}<001>texture,and recrystallization texture mainly composed with Cube{100}<001>is formed.Both the strength and plasticity significantly decrease after grain coarsening.The yield strength is decreased by 38 MPa and elongation is decreased to 16.36%with pre-deformation of 8%compared with those without pre-deformation.With the increase of pre-deformation,the fracture characteristics changes from ductile fracture to cleavage fracture characteristics.

关 键 词：临界变形量 2024铝合金 晶粒粗化 力学性能 

分 类 号：TG146.2[一般工业技术—材料科学与工程]