Severe plastic deformation of two-phase TiNiCuNb shape memory alloy

•Two-phase TiNiCuNb alloy was subjected to HPT process.•Nanocrystalline bands alternating with amorphous phase after HPT.•Nanoscale debris are embedded into amorphous phase. (Ti54Ni34Cu12)90Nb10 alloy with initial two-phase structure of B19 martensite and β-Nb phase was subjected to high-pressure to...

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Bibliographic Details
Published inMaterials letters Vol. 369; p. 136739
Main Authors Wang, B.H., Shuitcev, A.V., Li, Q.Z., Gunderov, D.V., Li, L., Valiev, R.Z., Tong, Y.X.
Format Journal Article
LanguageEnglish
Published Elsevier B.V 15.08.2024
Subjects
Amorphous structure
Microstructure
Severe plastic deformation
Shape memory materials
TiNiCuNb
Shape memory materials
Severe plastic deformation
TiNiCuNb
Microstructure
Amorphous structure
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Summary:•Two-phase TiNiCuNb alloy was subjected to HPT process.•Nanocrystalline bands alternating with amorphous phase after HPT.•Nanoscale debris are embedded into amorphous phase. (Ti54Ni34Cu12)90Nb10 alloy with initial two-phase structure of B19 martensite and β-Nb phase was subjected to high-pressure torsion (HPT) process at room temperature. HPT leads to the formation of nanocrystalline bands of β-Nb phase alternating with amorphous matrix. Nanocrystalline debris of B2 phase was found to be embedded into the amorphous matrix. Refinement of β-Nb phase upon HPT is much greater compared to that for pure Nb alloy.
ISSN:0167-577X
1873-4979
DOI:10.1016/j.matlet.2024.136739