摘要
针对TC4钛合金板材轧制过程中产生的各向异性问题,在温热条件下通过与轧制方向呈不同角度拉伸试件的有、无超声振动辅助的拉伸实验,分析了超声振动对TC4钛合金板材的屈服强度、断后伸长率及厚向异性系数的影响规律,得到了有助于提高TC4板材成形性能及有效抑制各向异性的超声振动工艺参数;通过对拉伸试件金相组织和断口形貌的分析,得到了超声振动对TC4钛合金板材微观组织和性能的影响。结果表明,TC4钛合金板材在温度400~600℃范围内拉伸时,施加频率为20 kHz、振幅为10μm的超声振动可以提高材料变形能力,还可以有效抑制板材的各向异性,同时对材料微观组织也不会造成较大影响。
To study the anisotropy problem during the rolling process of TC4 titanium alloy sheet,the tensile tests of the specimen at different angles from the rolling direction under thermal condition with and without ultrasonic vibration were carried out.The effect laws of ultrasonic vibration on the yield strength,elongation after fracture and normal anisotropy coefficient of TC4 titanium alloy sheet were analyzed,and the ultrasonic vibration process parameters were obtained,which contributed to the improvement of the formability of TC4 titanium alloy sheet and the effective inhibition of anisotropy.The effects of ultrasonic vibration on the microstructure and properties of TC4 titanium alloy sheet were obtained by analyzing the metallographic structure and fracture morphology of tensile specimens.The results show that when TC4 titanium alloy sheet is tensiled at the temperature of 400-600℃,the ultrasonic vibration with a frequency of 20 kHz and an amplitude of 10μm can improve the material deformation ability and effectively inhibit the anisotropy of the sheet,and at the same time it does not have a large impact on the microstructure of the material.
作者
高铁军
矫志辉
杨踊
赵天章
齐林
GAO Tie-jun;JIAO Zhi-hui;YANG Yong;ZHAO Tian-zhang;QI Lin(College of Aerospace Engineering,Shenyang Aerospace University,Shenyang 110136,China;AECC Shenyang Liming Aero Engine Co.,Ltd.,Shenyang 110043,China)
出处
《塑性工程学报》
CAS
CSCD
北大核心
2020年第3期88-94,共7页
Journal of Plasticity Engineering
基金
国家自然科学基金资助项目(51575364)
辽宁省创新人才计划资助项目(R2017069)
沈阳市中青年创新人才计划资助项目(RC180189)。
关键词
TC4钛合金
超声振动
温热条件
各向异性
TC4 titanium alloy
ultrasonic vibration
thermal condition
anisotropy
作者简介
第一作者/通讯作者:高铁军,男,1977年生,博士,教授,主要从事航空钣金件精准成形新技术研究,E-mail:tiejun_gao@163.com。
