欢迎您！东篱公司
退出
-
申报数据库
-
立项数据库
-
成果数据库
-
项目获奖数据库
中文摘要：
塑性成形中施加超声振动可以软化金属、改善材料成形性能,在拉拔等塑性成形工艺中已有广泛的应用,但超声振动在微成形中的应用则需要首先研究其对介观尺度材料成形性能的影响规律。文章设计了不施加超声振动和施加超声振动条件下纯钛TA1微圆柱体的压缩试验,研究了其流动应力的变化特点。试验结果表明,施加超声振动后材料流动应力的降幅随着试样尺寸的减小和超声振幅的增加而增加;材料的硬化指数随着单位体积材料吸收超声能量的增加先增大后减小。
英文摘要：
Ultrasonic vibration excitation can soften material and improve the material formability, and it has been widely used in the drawing process. However, the effects of ultrasonic vibration on mesoscopic scale material should be studied before applying its benefits to metallic micro-forming. The influence of ultrasonic vibration on the flow stress characteristics of pure titanium TA1 micro cylinder was investigated by conducting the compression process with and without ultrasonic vibration excitation. The results show that under the ultrasonic vibration excitation condition, the decreasing amplitude of material flow stress increases with the decrease of the specimen size and increase of ultrasonic vibration amplitude. With the increase of absorbed ultrasonic energy in unit volume, the material hardening exponent increases first and then decreases.
同期刊论文项目
同项目期刊论文
Constitutive model for thin sheet metal with one or several grains across thickness in micro-forming
Blanking clearance and grain size effects on micro deformation behavior and fracture in micro-blanki
Experimental investigation of distance effects between indenter and grain boundary on nanoindentatio
Effect of nano-crystals at surfaces induced by ion beam irradiation on the tribological behaviour in
A unified physically based crystal plasticity model for FCC metals over a wide range of temperatures
Mechanism of size effects in micro cylindrical compression of pure copper considering grain orientat
Experimental research on micro-deep drawing processes of pure gold thin sheet using DLC-coated femal
Crystal plasticity-based forming limit prediction for FCC materials under non-proportional strain-pa
期刊信息
位置：