Extension of high temperature life time of low activation vanadium alloys by nano-particle control

为了提高低活化度钒合金的高温强度和工作温度上限，分别采用重复热机械处理和机械合金化方法制备了高密度析出相和高密度纳米颗粒的V-4Cr-4Ti合金。力学性能评价，包括热蠕变试验，证实了析出物或纳米颗粒对高温强度的提高，并阐明了其机理。

For the purpose of enhancing high temperature strength and upper operation temperature limit of low activation vanadium alloys, which are promising candidate of fusion structural materials, production of V-4Cr-4Ti alloys containing high density precipitates and high density nano-particles was performed by repeated thermo-mechanical treatments and mechanical alloying, respectively. Mechanical property evaluation including thermal creep tests verified the increased high temperature strength by the precipitates or nano-particles, and the underlying mechanisms were clarified.