航空科学技术2025，Vol.36Issue(5)：75-80,6.DOI:10.19452/j.issn1007-5453.2025.05.009
电脉冲调控TC21钛合金线性摩擦焊接头强韧化机理研究
Investigation on the Mechanism of Strength and Toughness of Linear Friction Welded Joints of TC21 Titanium Alloy Regulated by Electrical Pulse Treatment
摘要
Abstract
The demanding service environment of aerospace structural components poses extremely high requirements for high-quality material joining.Linear friction welding of high-strength and high-toughness TC21 titanium alloy can produce joints with excellent strength and plasticity.However,the equiaxed grains and intragranular spherical dispersed particles in the weld zone of the joint can easily lead to reduced toughness.In this paper,an electrical pulse treatment(EPT)method was employed to synergistically regulate the equiaxed grains in the weld zone of the joint into a dual-configuration interlaced basketweave structure,utilizing both the Joule heating effect and the non-thermal electron wind force effect of electrical pulse.This approach weakened the flow-line microstructure characteristics in the heat-affected zone.As a result,the impact toughness of the joint after electrical pulse treatment increased from 16.7J/cm2 to 55.3J/cm2,reaching 90.5%of the base metal's toughness value(61.1J/cm2).Additionally,all tensile specimens fractured in the base metal region,indicating that the joint achieved excellent strength and toughness after electrical pulsing treatment.This research provides theoretical foundations and technical support for the high-quality fabrication of integral titanium alloy structural components.关键词
线性摩擦焊/TC21钛合金/电脉冲处理/热/非热效应/强韧化机制Key words
linear friction welding/TC21 titanium alloy/EPT/thermal/athermal effects/mechanism of strength and toughness分类
金属材料引用本文复制引用
赵鹏康,洪振宇,袁启龙,李菊,张传臣..电脉冲调控TC21钛合金线性摩擦焊接头强韧化机理研究[J].航空科学技术,2025,36(5):75-80,6.基金项目
航空科学基金(202200110T6001) （202200110T6001）
国家留学基金(202208615069) （202208615069）
教育部数控机床及机械制造装备集成重点实验室开放课题(SKJC-2022-05) （SKJC-2022-05）
西安市碑林区应用技术研发储备工程项目(GX2447) （GX2447）
校企合作开发项目(2024610002012264) Aeronautical Science Foundation of China(202200110T6001) （2024610002012264）
China Scholarship Council(202208615069) （202208615069）
Open Project of Key Laboratory of Numerical Control Machine Tool and Mechanical Manufacturing Equipment Integration of the Min-istry of Education(SKJC-2022-05) （SKJC-2022-05）
Application Technology Research and Development Reserve Project of Beilin District,Xi'an City(GX2447) （GX2447）
School Enterprise Cooperation Development Project(2024610002021264) （2024610002021264）
