Papers by Keyword: Ti₃Al Alloy

Abstract: The filling capability of forging die is the key to design forging die and it exerts an important influence to the quality and life of die. In response to the difficulty in filling of forging die, and taking forged Ti₃Al alloy as the research object, at the same height of reducing, strain rates during forming as the control objective, the finite element numerical simulation method was used to simulate the hot compression of Ti₃Al alloy with DEFORM-3D. This test simulated the process of hot compression, analysed the hot compression behavior of the stuff and discussed the effect of strain rates on the variety and distribution of stress and strain.

Abstract: The filling capability of forging die is important to design forging die and it exerts a decisive influence to the quality and life of die. Due to the deficiency of the filling capability, and taking Ti₃Al alloy as the research object, at the same height of reducing, work-piece dimensions as the control objective, the finite element numerical simulation method was used to simulate the hot compression of Ti₃Al alloy with DEFORM-3D. This test simulated the process of hot compression, analyzed the hot deforming behavior of the stuff and discussed the effect of work-piece dimension on the variety and distribution of stress and strain.

Abstract: The ceramic coatings with thickness up to 120 μm were prepared on Ti3Al-based alloy in silicate electrolyte by microarc oxidation method. The morphology, microstructure, composition and phase constituent of the coatings were investigated. Microhardness profiles along the cross-section of the coating were determined. The maximum microhardness in the coating was about 3 times higher than that of the substrate. The thickness of the coating increased with the increasing of MAO time. There were two layers in the ceramic coatings: a dense layer and a loose layer. The coating was mainly composed of (Ti0.6Al0.2Nb0.2)O2 phase. Scratching test revealed a good adhesion between the Ti3Al substrate and the coating.