摘要
针对钛合金板材塑性变形能力差的问题,进行了超声振动辅助成形工艺的研究,分析超声振动对钛合金TA2板材力学性能及与接触面之间摩擦系数的影响。在此基础上进行了不同宽长比坯料的超声振动辅助胀形实验,分析超声振动对TA2板材胀形力、极限胀形高度的影响。同时,基于网格应变原理,通过不同宽长比坯料极限应变的测量,建立TA2板材的成形极限图。结果表明,选择合适的超声振动辅助成形工艺参数,不仅可以提高TA2板材变形能力,还可以减小摩擦对板材成形性能的影响,从而有效提高了TA2板材的成形极限。
Aiming at the problem of poor formability of titanium alloy sheet,the ultrasonic vibration-assisted forming process was studied,the effects of ultrasonic vibration on the mechanical properties of TA2 titanium alloy sheet and the friction coefficient between the contact surfaces were analyzed.On this basis,the ultrasonic vibration-assisted bulging experiment was carried out on specimens with different width-to-length ratios,and the influence of ultrasonic vibration on the bulging force and limit bulging height of TA2 sheet was analyzed.At the same time,based on the grid strain principle,the forming limit diagram of the TA2 sheet was established by measuring the limit strain of the specimens with different width-to-length ratios.The results show that choosing appropriate process parameters in ultrasonic vibration-assisted forming can not only improve the formability of TA2 sheet,but also reduce the influence of friction on plastic deformation behavior of sheet,thus effectively increasing the forming limit of TA2.
作者
高铁军
王旭
刘少青
王硕
Gao Tiejun;Wang Xu;Liu Shaoqing;Wang Shuo(College of Aerospace Engineering,Shenyang Aerospace University,Shenyang 110136,China;AVIC Shenyang Xinghua Aero-electricAppliance Co.,Ltd,Shenyang 110144,China)
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2020年第12期4010-4015,共6页
Rare Metal Materials and Engineering
基金
National Natural Science Foundation of China(51575364)
Liaoning Province Innovative Talents Program(R2017069)
Shenyang Young and Middle-aged Innovative Talents Program(RC180189)。
关键词
TA2板材
超声振动
摩擦系数
胀形
成形极限图
TA2 titanium alloy sheet
ultrasonic vibration
friction coefficient
bulging
forming limit diagram
