Affiliation:
1. Ministry of Education Key Laboratory of Advanced Structural Materials (Changchun University of Technology) Changchun 130012 People's Republic of China
2. Jilin Provincial Key Laboratory of Advanced Materials Processing and Application for Rail Transit Changchun 130012 People's Republic of China
3. School of Materials Science and Engineering Changchun University of Technology Changchun 130012 People's Republic of China
4. International Center of Future Science Jilin University Changchun 130012 People's Republic of China
Abstract
AbstractIn this paper, titanium‐aluminum based alloy was successfully prepared by introducing titanium powders using powder metallurgy. The experimental results indicated that the microstructures of alloys were composed of the new trititanium‐aluminium layers skeleton and the γ+α2 phases filler, which exhibited excellent compression properties. The compressive strength of the titanium‐aluminum based alloy (10 wt.% titanium) were 509.9 MPa, higher than monolithic Ti‐48Al‐2Cr‐2Nb alloy at 800 °C and 1×10−4 s−1. The deformation mechanism is mainly referred to the motion and rotation of γ+α2 areas and dynamic recrystallization. The γ+α2 areas were surrounded by complete new trititanium‐aluminium layers, which is beneficial to dislocation pile‐up, cross and tangle at grain boundaries, resulting in high strength. Besides, the dislocation pile of γ, α2 phase, and twins in γ phases, are the deformation mechanism in alloys.