Effect of high pressure torsion on the aging kinetics of β-titanium Ti-15Mo alloy

6th International Conference on Nanomaterials by Severe Plastic Deformation

材料科学;化学

Gatina, Svetlana^1 ; Semenova, Irina^1 ; Janecek, Milos^2 ; Strasky, Josef^2

Ufa State Aviation Technical University, K. Marx Street 12, 450 000, Ufa, Russia^1

Charles University in Prague, Ke Karlovu 5, 121 16 Prague, Czech Republic^2

关键词: Alloy microstructure;    Coarse grained alloys;    Effect of high pressure;    Experimental methods;    High pressure torsions;    Morphological features;    Structural investigation;    Ultrafine grained alloys;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/63/1/012068/pdf
DOI  :  10.1088/1757-899X/63/1/012068

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

This paper focuses on the study of the aging kinetics of the β-titanium Ti-15Mo alloy prepared by high pressure torsion. The experimental methods of differential scanning calorimetry and transmission electron microscopy were used for structural investigations. It was established that during aging at 500 and 550 °C, in the ultrafine-grained (UFG) alloy, the precipitating a-particles have mostly equiaxed morphology, in contrast to the needle-like and lens one in the coarse-grained (CG) alloy. There have been identified differences in the aging kinetics of the Ti-15Mo alloy in the UFG state identified by a decrease in microhardness within the first 30 minutes of heating, as opposed to the CG alloy coarsening. The influence of morphological features of the alloy microstructure on the strengthening effect after aging is discussed.