Ti-0.2Pd钛合金高温拉伸本构关系

Constitutive Relationship of Ti-0.2Pd Alloy at Elevated Temperatures

采用高温拉伸试验,研究了Ti-0.2Pd在600～800°C,应变速率10-4～10-1s-1的高温流变行为。获得了流变应力与应变速率和变形温度的依存关系以及变形激活能Q为100.9kJ.mol-1,应力指数n为4.8。建立了Ti-0.2Pd合金热变形的理论基础。

Hot tensile test is conducted to study the deformation behavior of Ti-0. 2Pd titanium alloys （TAg） at 600--800 ℃ and at strain rate 10^-4--10^-1 s^-1. The results show that the flow stress is affect- ed by both the strain rate and the temperature. From the tests, the associated deformation mechanism is concluded that the deformation activation energy Q is 100. 9 kJ/mol and the stress exponent n is 4.8. The theorical basis for the hot-deformation of Ti-0.2Pd alloy is established.