摘要
通过金相显微镜、电子万能试验机等系统研究了固溶时效对钛合金显微组织及力学性能的影响。结果表明:随着固溶温度从800℃增至950℃,TC4合金中等轴α相降低,β相则相反;随着时效温度从500℃增至600℃,次生片层α相宽度逐渐增大。相对退火态材料,850℃/1 h固溶态合金在不显著降低塑性的同时,将屈服强度和抗拉强度分别从855、879 MPa提高到964,1 060 MPa,分别提升12.8%和20.6%;相对950℃/1 h固溶态材料,950℃/1 h+550℃/4 h固溶时效合金在保持相当塑性的同时,将屈服强度和抗拉强度分别从928,978 MPa提高到1 084,1 093 MPa,分别提升16.8%和11.8%,这归因于β基体析出大量次生α相的强化效应;此外,建立了固溶时效参数、显微组织特征与宏观力学性能间的关系曲线,为飞行保护头盔用钛合金挂片的组织性能优化及安全稳定性提供了数据支撑和借鉴。
The influence of solution aging on the microstructure and mechanical properties of titanium alloys was studied through systems such as metallographic microscope and electronic universal testing machine.The results show that as the solution temperature increases from 800℃to950C,theaxialαphase of the TC4 alloy decreases,while the β phase is the opposite.As the aging temperature increases from 500℃ to 600℃,the width of theαphase in the secondary laminates gradually increases.Compared with the annealed state material,the solid solution state alloy at 850℃/1 h increases the yield strength and tensile strength from 855 MPa and 879 MPa to 964 MPa and 1060 MPa respectively without significantly reducing the plasticity,increasing by 12.8%and 20.6%respectively.Compared with the solid solution state material at 950℃/1 h,the solid solution aging alloy at 950℃/1 h+550℃/4 h,while maintaining considerable plasticity,increases the yield strength and tensile strength from 928 MPa and 978 MPa to 1084 MPa and 1093 MPa respectively,increasing by 16.8%and 11.8%respectively.This is attributed to the strengthening effect of a large amount of secondaryαphase precipitated from theβmatrix;In addition,the relationship curves among solution aging parameters,microstructure characteristics and macroscopic mechanical properties were established,providing data support and reference for the microstructure and property optimization as well as safety and stability of titanium alloy hangers used in flight protection helmets.
作者
李强
范浩南
谭长生
景建元
梁志
朱露
张国君
LI Qiang;FAN Haonan;TAN Changsheng;JING Jianyuan;LIANG Zhi;ZHU Lu;ZHANG Guojun(School of Materials Science and Engineering,Xi'an University of Technology,Xi'an 710000,China;Jiangxi Lianchuang Electroacoustic Co.Ltd.,Nanchang 330096,China;Yangzhou Pipe Fitting Factory Co.Ltd.,Yangzhou 225800,China;Shandong Juntai Mater Material Co.Ltd.,Dezhou 251200,China)
出处
《兵器材料科学与工程》
北大核心
2025年第5期87-92,113,共7页
Ordnance Material Science and Engineering
基金
2024年度吉安市“双百计划”创新高端人才项目。
关键词
TC4钛合金
头盔挂片
固溶时效处理
显微组织
拉伸性能
TC4 titanium alloy
helmet hanger
solution aging treatment
microstructure
tensile property
