Characterization of microstructure and mechanical property of pure titanium with different Fe addition processed by severe plastic deformation and subsequent annealing

7th International Conference on Nanomaterials by Severe Plastic Deformation

Deng, Guanyu^1 ; Bhattacharjee, Tilak^1,2 ; Chong, Yan^1 ; Zheng, Ruixiao^1 ; Bai, Yu^1,2 ; Shibata, Akinobu^1,2 ; Tsuji, Nobuhiro^1,2

Department of Materials Science and Engineering, Kyoto University, Japan^1

Elements Strategy Initiative for Structural Materials (ESISM), Kyoto University, Japan^2

关键词: Biomedical industry;    Electron back scatter diffraction;    Excellent corrosion resistances;    High pressure torsions;    Microhardness tests;    Microstructure and mechanical properties;    Severe plastic deformations;    Ultrafine-grained metals;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/194/1/012020/pdf
DOI  :  10.1088/1757-899X/194/1/012020

来源: IOP

【 摘 要 】

Titanium and Ti-alloys are widely used in the marine, aerospace, and biomedical industries due to their high strength to weight ratio, excellent corrosion resistance, and biocompatibility. Increasing the strength level of pure Ti via grain refinement without a considerable decrease in ductility is an attractive approach. Fabrication of nanostructured or ultrafine grained (UFG) metals using severe plastic deformation (SPD) techniques has attracted a lot of interest in the last two decades. The main purpose of the present study is to explore the influence of Fe addition in grain refinement in pure Ti. As-cast pure Ti with two different levels of Fe was firstly deformed by high pressure torsion (HPT) up to 10 rotations at room temperature, and then annealed in a vacuum at a temperature of 500 °C for half an hour. Detailed microstructures were characterized by transmission electron microscopy (TEM) and electron backscatter diffraction (EBSD), and mechanical property was examined by microhardness test.