单级固溶温度对喷射沉积2195铝锂合金组织演变的影响  

Effect of single⁃stage solution temperature on microstructure evolution of spray deposited 2195 Al⁃Li alloy

作　　者：孙数理 侯小虎[1] 郭文霞 张静[3] 王超 赵学平 曹宇 Sun Shuli;Hou Xiaohu;Guo Wenxia;Zhang Jing;Wang Chao;Zhao Xueping;Cao Yu(School of Materials Science and Engineering,Inner Mongolia University of Technology,Hohhot Inner Mongolia 010051,China;Engineering Training Department,Inner Mongolia University of Technology,Hohhot Inner Mongolia 010051,China;College of Construction Equipment and Automation,Inner Mongolia Technical College of Construction,Hohhot Inner Mongolia 010070,China;Binzhou Bohai Piston Co.,Ltd.,Binzhou Shandong 256600,China;Shandong Advanced Aluminum Community Management and Operation Co.,Ltd.,Binzhou Shandong 256600,China)

机构地区：[1]内蒙古工业大学材料科学与工程学院,内蒙古呼和浩特010051 [2]内蒙古工业大学工程训练教学部,内蒙古呼和浩特010051 [3]内蒙古建筑职业技术学院建筑设备与自动化学院,内蒙古呼和浩特010070 [4]滨州渤海活塞有限公司,山东滨州256600 [5]山东省高端铝共同体管理运营有限公司,山东滨州256600

出　　处：《金属热处理》2024年第6期62-68,共7页Heat Treatment of Metals

基　　金：国家自然科学基金(62264013);内蒙古自治区自然科学基金(2023LHMS01013);内蒙古自治区直属高校基本科研业务费项目(JY20220144,JY20240046);内蒙古自治区高等学校科学研究项目(NJZY23070,NJZZ21019)。

摘　　要：利用扫描电镜(SEM)及配套的电子背散射衍射仪(EBSD)定量分析了单级固溶温度对喷射沉积2195铝锂合金第二相颗粒、晶粒尺寸、小角度晶界、再结晶分数、残余应力的影响,并采用电子万能试验机对合金的力学性能进行测试。结果表明,经510℃×40 min固溶处理后,合金平均晶粒尺寸由4.57μm(挤压态)增至13.96μm,小角度晶界占比由73.1%(挤压态)降至52.1%,第二相颗粒占比由9.4%(挤压态)降至0.73%,残余应力显著降低,再结晶晶粒、亚晶晶粒占比分别由31.4%、22.2%(挤压态)增至41.8%、53.6%,变形晶晶粒占比由46.4%降至4.6%,硬度值达到101.5 HV,抗拉强度达到441.6 MPa。随着固溶温度的升高,合金显微组织发生显著改变,力学性能呈现先增大后降低的趋势。Effect of single⁃stage solution temperature on the second⁃phase particles,grain size,low⁃angle grain boundaries,recrystallization fraction and residual stress of spray⁃deposited 2195 aluminum⁃lithium alloy was quantitatively analyzed by means of scanning electron microscopy(SEM)and the accompanying electron backscatter diffraction(EBSD)analyzer.The mechanical properties of the alloy were tested using an electronic universal testing machine.The results show that after solution treatment at 510℃for 40 min,the average grain size is increased from 4.57μm in as⁃extruded to 13.96μm,the proportion of low⁃angle grain boundaries is decreased from 73.1%(as⁃extruded)to 52.1%,the proportion of second⁃phase particles is decreased from 9.4%(as⁃extruded)to 0.73%,and the residual stress is decreased significantly.Meanwhile the recrystallization and subgrain fractions are increased from 31.4%and 22.2%to 41.8%and 53.6%respectively,the proportion of deformed grains is decreased from 46.4%to 4.6%,the hardness reaches 101.5 HV,and the tensile strength reaches 441.6 MPa.With the increase of solution treatment temperature,the microstructure of the alloy changes significantly,and the mechanical properties show a trend of first increasing and then decreasing.

关 键 词：铝锂合金 固溶处理 第二相 再结晶 小角度晶界 

分 类 号：TG156.1[金属学及工艺—热处理]