Quantitative Analysis of Strengthening Effect Contributed by Microstructure Characteristics in Pure Titanium Consolidated by Severe Plastic Deformation

• DOI: 10.1007/s11665-020-04601-7
• Publication Date: 2020-02-04T13:02:39Z
• Authors: Peng Luo
• Keywords: 0103 physical sciences; 01 natural sciences

Chips of commercial pure titanium (ASTM Grade 2) were consolidated into fully dense bulk material by severe plastic deformation (in the form of multi-pass equal channel angular pressing). The strengthening effect (as contributed by microstructure characteristics) was quantitatively analyzed by electron backscatter diffraction and mechanical tests. The effects of grain parameters (e.g., grain size and grain orientation) on yield strength and the Vickers micro-hardness were analyzed by the Hall–Petch relationship. The tensile curve of the consolidated sample was modeled by the Ludwik–Hollomon equation. The strain-hardening of the consolidated titanium was analyzed by the Taylor formula and the Kocks–Mecking equation. The theoretical analysis is consistent with the experimental results obtained from microstructure characterization and mechanical testing.