时效温度对TB15钛合金组织和力学性能的影响  

Effect of aging temperature on microstructure and mechanical properties of TB15 titanium alloy

作　　者：李明祥[1] 胡生双 陈素明[1] 肖君 张颖云 张兵宪[1] 徐勇[3] Li Mingxiang;Hu Shengshuang;Chen Suming;Xiao Jun;Zhang Yingyun;Zhang Bingxian;Xu Yong(AVIC Xi'an Aircraft Industry(group)company Co.,Ltd.,Xi'an Shaanxi 710089,China;Xi'an Triangle Defence Incorporated Company,Xi'an Shaanxi 710089,China;School of Materials Science and Engineering,Nanchang Hangkong University,Nanchang Jiangxi 330063,China)

机构地区：[1]航空工业西安飞机工业(集团)有限责任公司,陕西西安710089 [2]西安三角防务股份有限公司,陕西西安710089 [3]南昌航空大学材料科学与工程学院,江西南昌330063

出　　处：《金属热处理》2021年第10期92-96,共5页Heat Treatment of Metals

基　　金：航空科学基金(2019ZE056009);江西省重点研发计划(20202BBEL53012)。

摘　　要：利用光学显微镜、扫描电镜和拉伸试验机等研究了不同时效温度对固溶态TB15钛合金微观组织和力学性能的影响。结果表明:随着时效温度从520℃升高到540℃,TB15钛合金的拉伸强度和屈服强度先增加后减小,在530℃时效处理后可以获得最高的抗拉强度和屈服强度;时效处理后合金塑性偏低,其变化规律与强度相反。在断裂韧性方面,随着时效温度的上升,TB15钛合金的断裂韧性逐渐提高。固溶态TB15钛合金经不同温度时效处理后,析出大量的次生α片层相,等轴β组织转变为片层α和β转变组织。Effect of aging temperature on the microstructure and mechanical properties of TB15 titanium alloy was studied by means of OM,SEM and tensile testing.The results show that with the aging temperature increasing from 520℃to 540℃,the tensile strength and yield strength of the TB15 titanium alloy first increase and then decrease,and the highest tensile strength and yield strength can be obtained at 530℃of aging treatment.The plasticity of the alloy is low after aging treatment,which variation is opposite to the strengths.As the increase of aging temperature,the fracture toughness of the alloy increases gradually.After aging at different temperatures,a large number of secondaryαlamellar phases are precipitated in the solid solution treated TB15 titanium alloy,and the equiaxedβmicrostructure transforms into lamellarαandβtransformed microstructure.

关 键 词：TB15钛合金 时效处理 力学性能 组织 

分 类 号：TG146.2[一般工业技术—材料科学与工程]