Microstructure evolution in ultrafine-grained Ti and Ti-6Al-7Nb alloy processed by severe plastic deformation

6th International Conference on Nanomaterials by Severe Plastic Deformation

材料科学;化学

Strasky, J.^1 ; Harcuba, P.^1 ; Hajek, M.^1 ; Vaclavova, K.^1 ; Zhanal, P.^1 ; Janecek, M.^1 ; Polyakova, V.^2 ; Semenova, I.^2

Charles University in Prague, Ke Karlovu 5, 121 16, Prague, Czech Republic^1

Ufa State Aviation Technical University, K. Marx Street 12, 450 000, Ufa, Russia^2

关键词: Commercially Pure titaniums;    Micro-structure evolutions;    Microstructural changes;    Recovery and recrystallization;    Resistivity measurement;    Severe plastic deformations;    Ultra-fine-grained;    Ultrafine-grained Ti;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/63/1/012072/pdf
DOI  :  10.1088/1757-899X/63/1/012072

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Unique in-situ electric resistivity measurement was utilized to identify microstructural changes in ultra-fine grained commercially pure titanium and Ti-6Al-7Nb alloy. Both materials were prepared by equal channel angular pressing. Changes in resistivity evolution during in-situ heating were compared to scanning electron microscopy observations. Both materials are stable up to 440°C. Further heating at rate 5°C/min causes recovery and recrystallization of UFG structure. At 650°C the microstructure is fully recrystallized. High resolution in-situ electric resistivity measurement is capable of detecting recovery and recrystallization in UFG CP Ti and Ti-6Al-7Nb alloy.