Phase stability and tensile behavior of metastable β Ti-V-Fe and Ti-V-Fe-Al alloys
- Shanghai Key Laboratory of Advanced High-Temperature Materials and Precision Forming, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240 (China)
Highlights: • A series of metastable β Ti-V-Fe and Ti-V-Fe-Al alloys were designed by molybdenum equivalency. • Ti-16V-Fe alloy deforms via {332}<113> twinning and stress-induced ω phase transformation. • Ti-12V-2Fe-Al and Ti-14V-2Fe-Al alloys deform via {332}<113> twinning and stress-induced α″ phase transformation. • Al addition suppresses athermal ω phase transformation in β Ti-V-Fe-Al alloys. • Fe and Al additions produce an effective solid-solution hardening for β Ti-(12-14)V-2Fe-Al alloys deformed via twinning. - Abstract: The tensile property and deformation microstructure of a series of metastable β Ti-V-Fe and Ti-V-Fe-Al alloys have been studied. The results show that although Al is an α-stabilizer element, Al addition suppresses the athermal ω phase transformation in metastable β Ti-V-Fe-Al alloys. The Ti-16V-Fe alloy plastically deforms via {332}<113> mechanical twinning and stress-induced ω phase with a special habit plane of {−5052}{sub ω}//{3-3-2}{sub β}, and the Ti-14V-2Fe-Al and Ti-12V-2Fe-Al alloys via {332}<113> twinning. The Ti-16V-2Fe, Ti-16V-2Fe-Al and Ti-16V-2Fe-2Al alloys with relatively high β phase stability plastically deforms mainly via dislocation glide. The Ti-16V-Fe, Ti-14V-2Fe-Al and Ti-12V-2Fe-Al alloys exhibit higher yield strength without loss of plasticity significantly than the binary β Ti-V alloys deformed via {332}<113> twinning due to solid-solution strengthening effect of Fe and Al elements in the alloys.
- OSTI ID:
- 22805102
- Journal Information:
- Materials Characterization, Journal Name: Materials Characterization Vol. 142; ISSN 1044-5803; ISSN MACHEX
- Country of Publication:
- United States
- Language:
- English
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