摘要
通过PC、实验控制软件、DSP、灵敏传感器等组成控制系统对钛合金超塑性拉伸变形过程进行优化控制,以便获得更好的超塑性。讨论了m值法计算机闭环控制系统的原理和实验方法。结果表明,利用m值法计算机闭环控制系统对变形进行监控,TC11钛合金能够获得更显著的超塑性,能有效地找到一种材料最佳变形模式。
In this paper, the emphasis is placed on the principles and experiment method of its computer control. In superplastic deformation （SPD） process, strain-rate sensitivity exponent （m） is a critical parameter, which represents, articulates and quantifies the superplasticity level. The higher the m value, the better the superplasficity of the materials. When the titanium alloy is in plastic deformation, we probe the force and speed through sensor and calculate the value of m. Then according to the situation of value of m fluctuating, we will send the best speed to machine. The experiment results show that by maximum m superplasticity deformation （MaxmSPD）, the titanium alloys produce marked superplastie behaviour in comparison with those general superplastic test methods. The new method can investigate the optimal super-plastic deformation pattern.
出处
《南昌航空工业学院学报》
CAS
2007年第1期30-34,共5页
Journal of Nanchang Institute of Aeronautical Technology（Natural Science Edition）
基金
国家973资助项目(N0.51319)
航空科学基金资助项目(05G56008)
关键词
钛合金
超塑性
应变速率敏感指数
闭环控制系统
titanium alloy
superplastic deformation
strain-rate sensitivity exponent （m）
maximum m superplasficity deformation
computer feedback control system
