Transformations of α' martensite in Ti–Fe alloys under high pressure torsion. (15th July 2017)

• Record Type: Journal Article
• Authors: Kilmametov, A.; Ivanisenko, Yu; Straumal, B.; Mazilkin, A.A.; Gornakova, A.S.; Kriegel, M.J.; Fabrichnaya, O.B.; Rafaja, D.; Hahn, H.
• Is Part Of: Scripta materialia. Number 136(2017)
• Page Start: 46
• Page End: 49
• Publication Date: 2017-07-15
• Subjects: Nano-crystalline metals -- Microstructure -- Thermodynamics and kinetics -- Ti–Fe alloy -- High-pressure torsion; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2017.04.010
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: Phase transitions in α'-Ti martensite driven by high pressure torsion (HPT) as well as α' → ω transformations in Ti–Fe alloys were observed for the first time. The as cast alloys transformed into α'-Ti martensite after annealing in the β-(Ti, Fe) solid solution region and subsequent quenching. Lattice parameters of α'-Ti martensite decreased with increasing iron content, similar to the lattice parameter of β-Ti. During HPT, α'-Ti martensite transformed partly into ω-Ti. At the same time, the lattice parameters of remaining α'-Ti phase increased towards those for iron-free α-Ti. These processes included an increased mass transfer of iron atoms out of α'-Ti. Graphical abstract: