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Title: Deformation of a Ti-Nb alloy containing α'-martensite and omega phases

Microscopic deformation of a Ti-17at. %Nb alloy with high fractions of α″-martensite and ω phases was studied by in-situ synchrotron X-ray diffraction. Textures, phase fractions, individual lattice strains, and peak intensities during deformation were studied. It is found that, to accommodate the external tensile strain, some of the α″ and ω grains were first transformed to the β-phase, which then continuously transformed to the α″-phase with chosen variants that effectively accommodate the deformation strain. A strong (010){sub α″} fiber texture was formed at the expense of the (001){sub α″} and (111){sub α″} fiber textures. Above 400 MPa applied stress, (110){sub α″} deformation twinning was triggered with a simultaneous stress relaxation in the (110){sub α″} family and a slight increase in its texture strength in the loading direction.
Authors:
;  [1] ;  [2]
  1. Fort Wayne Metals Research Products Corporation, 9609 Ardmore Ave., Fort Wayne, Indiana 46809 (United States)
  2. Advanced Photon Source, Argonne National Laboratory, 9700 S. Cass Ave., Argonne, Illinois 60439 (United States)
Publication Date:
OSTI Identifier:
22398813
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 106; Journal Issue: 13; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; DEFORMATION; FIBERS; LOADING; MARTENSITE; NIOBIUM ALLOYS; PHASE TRANSFORMATIONS; STRAINS; STRESS RELAXATION; STRESSES; SYNCHROTRON RADIATION; TEXTURE; TITANIUM ALLOYS; TWINNING; X-RAY DIFFRACTION