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

Microscopic deformation of a Ti-17at. %Nb alloy with high fractions of alpha"-martensite and omega 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 alpha" and omega grains were first transformed to the beta-phase, which then continuously transformed to the alpha"-phase with chosen variants that effectively accommodate the deformation strain. A strong (010)(alpha") fiber texture was formed at the expense of the (001)(alpha") and (111)(alpha") fiber textures. Above 400 MPa applied stress, (110)(alpha") deformation twinning was triggered with a simultaneous stress relaxation in the (110)(alpha") family and a slight increase in its texture strength in the loading direction. (C) 2015 AIP Publishing LLC.
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Publication Date:
OSTI Identifier:
DOE Contract Number:
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 106; Journal Issue: 13
American Institute of Physics (AIP)
Research Org:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Country of Publication:
United States