固溶时效处理对Ti-5.43Al-3.11Mo-1.41V合金显微组织和力学性能的影响  

Effect of solution and aging treatment on microstructure and mechanical properties of Ti-5.43Al-3.11Mo-1.41V titanium alloy

作　　者：陈浩 侯岳红 张曦 魏亚 杨义 吴松全 李阁平[3] 梁恩泉[2] 黄爱军 Chen Hao;Hou Yuehong;Zhang Xi;Wei Ya;Yang Yi;Wu Songquan;Li Geping;Liang Enquan;Huang Aijun(School of Materials Science and Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China;Shanghai Aircraft Design and Research Institute,Shanghai 201210,China;Institute of Metal Research,Chinese Academy of Sciences,Shenyang Liaoning 110016,China;Department of Materials Science and Engineering,Monash University,Clayton,VIC,3800,Australia)

机构地区：[1]上海理工大学材料科学与工程学院,上海200093 [2]上海飞机设计研究院,上海201210 [3]中国科学院金属研究所,辽宁沈阳110016 [4]Department of Materials Science and Engineering,Monash University,Clayton,VIC,3800,Australia

出　　处：《金属热处理》2021年第7期155-160,共6页Heat Treatment of Metals

摘　　要：对BT14钛合金(Ti-5.43Al-3.11Mo-1.41V)进行不同温度固溶+时效热处理,研究了固溶温度对合金的显微组织、元素分布和硬度和压缩性能的影响。结果表明,在β相转变温度以下固溶后,随固溶温度上升,初生α相含量不断减少,初生α相和基体相(α'、α″或亚稳β相)中的Al含量均增加,Mo和V含量均下降,显微硬度上升。890、940、990℃固溶+540℃×6 h时效处理后,基体相分解形成弥散细小的α+β相,起到显著的强化作用,导致显微硬度整体提高,且随着固溶温度的升高,显微硬度和压缩屈服强度提高。Effect of solution temperature on microstructure,element distribution,hardness and compression properties of the BT14 titanium alloy(Ti-5.43Al-3.11Mo-1.41V)under different temperature solution and aging treatment was studied.The results show that after solid solution below theβphase transition temperature,the volume fraction of primaryαphase in the alloy decreases as the solution temperature increases,both the Al content in primaryαphase and matrix phase(α',α″,metastableβphase)increase,while the Mo and V contents decrease,meanwhile,the microhardness increases.After solution treatment at 890,940,990℃,respectively,and then all aging at 540℃for 6 h,the matrix phase of the alloy decomposes into fineα+βphases,which result in the microhardness increasing,moreover,the microhardness and compressive yield strength increase as the solution temperature increases.

关 键 词：BT14钛合金 固溶 时效 显微组织 力学性能 

分 类 号：TG146.23[一般工业技术—材料科学与工程]