超声波振动对钛箔拉伸性能及位错分布的影响  

Influence of ultrasonic vibration on tensile properties and dislocation distribution of titanium foil

作　　者：蒋少松[1] 杨天豪 孙宏宇 何玉石 卢振[1] 王瑞卓 JIANG Shao-song;YANG Tian-hao;SUN Hong-yu;HE Yu-shi;LU Zhen;WANG Rui-zhuo(National Key Laboratory for Precision Hot Processing of Metals,Harbin Institute of Technology,Harbin 150001,China;Shanghat Aerospace Equipment Manufactory,Shanghai 200245,China;Beijing Spacecrafts Manufacturing Co.,Ltd.,Beijing 100094,China)

机构地区：[1]哈尔滨工业大学金属精密热加工国防科技重点实验室,哈尔滨150001 [2]上海航天设备制造总厂,上海200245 [3]北京卫星制造厂有限公司,北京100094

出　　处：《材料工程》2019年第2期84-89,共6页Journal of Materials Engineering

基　　金：国家自然科学基金青年基金(51305100)

摘　　要：以研究超声波振动条件下钛箔的塑性变形特征和位错分布为目的,通过超声波辅助单向拉伸实验和微观组织分析研究不同超声波振动施加方式对钛箔塑性拉伸变形过程中的应力-应变、伸长率及位错分布的影响规律。结果表明:超声波振动过程中钛箔的流动应力最大降幅可以达到约80%,材料的伸长率从未施加超声时的40.33%最大增加至54.46%。通过TEM可以发现超声波振动条件下位错呈现平行分布的趋势且无大量缠结出现,而未施加超声拉伸的试样中位错的分布则显得杂乱无章且缠结严重。The plastic deformation with respect to dislocation distribution of titanium foil under ultrasonic vibration was studied.The inlluencing rule of different ultrasonic vibration modes on the stress-strain,elongation and dislocation distribution of titanium foll during plastic deformation was studied by uniaxial tensile test and microstructure analysis.The results show that the low stress of titanium foll can be reduced by about 80%and the elongation can increase from 40.33%to 54.46%during ultrasonic vibration.TEM shows that the dislocations tend to be parallel to each other without large amount of entanglement,and the distribution of dislocations in the samples without ultrasonic vibra tion is chaotic and seriously entangled.

关 键 词：超声波振动 钛箔 应力-应变 位错分布 

分 类 号：TG301[金属学及工艺—金属压力加工]