日本金属学会誌

J. Japan Inst. Met. Mater, Vol. 78, No. 3 (2014),
pp. 103-108

Relationship of Rolling Reduction with Microstructure and Mechanical Properties of Cold-Rolled Ti-20V-4Al-1Sn Alloy

Naofumi Ide1, Tatsuro Morita1, Takashi Maeda2 and Hideto Seto2

1Department of Mechanical and System Engineering, Graduate School of Science and Technology, Kyoto Institute of Technology, Kyoto 606-8585
2Technical Research and Development Bureau, Nippon Steel and Sumitomo Metal Corporation, Niigata 942-8510

Abstract:

This study was conducted to investigate the relationship of rolling reduction with the microstructure and mechanical properties of cold-rolled Ti-20V-4Al-1Sn alloy. Cold rolling was performed under the rolling reduction between 10-50%. The microstructure was compressed by cold rolling, and became finer. Plastic deformation was partially inhomogeneous in the thickness direction of the cold-rolled material. The preferred orientation of the formed crystallographic texture was {112}<110> ∼{001}<110> which is typical in metals possessing the bcc structure. The texture evolved with increasing rolling reduction. Hardness and static strength were increased by increase in rolling reduction because of work hardening and microstructural refinement. Anisotropy was induced in yield strength and work hardening exponent by cold rolling; however, it was not marked in hardness and tensile strength. [doi:10.2320/jinstmet.JBW201306]


(Received 2013/10/15)

Keywords:

titanium alloy, titanium-20 vanadium-4 aluminum-1 tin, cold rolling, rolling reduction, microstructure, crystallographic texture, hardness, mechanical properties, electron back-scattered diffraction analysis, pole figure


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