TY - JOUR
T1 - Enhancement of uniform elongation in high strength Ti-Mo based alloys by combination of deformation modes
AU - Min, X. H.
AU - Tsuzaki, K.
AU - Emura, S.
AU - Tsuchiya, K.
N1 - Copyright:
Copyright 2011 Elsevier B.V., All rights reserved.
PY - 2011/5/25
Y1 - 2011/5/25
N2 - A combination of different deformation modes, namely, dislocation slip and {3. 3. 2}〈1. 1. 3〉 twinning was found to be effective for achieving high yield strength and large uniform elongation in the β type Ti-15Mo-5Zr and Ti-10Mo-2Fe alloys in the as-solution treated condition, where the Mo equivalency was designed to be between 15.3 and 18.7. mass%. The high yield strength was caused mainly by the slip, and the large uniform elongation was caused by the twinning through significant work hardening. The change in the work hardening rate with strain correlated well with the formation of mechanical twins. The deformation was heterogeneous among the grains and the twins were not seen in some of the grains even after the tensile fracture. This heterogeneity was discussed based on the effects of the grain orientation and the segregation of alloying elements.
AB - A combination of different deformation modes, namely, dislocation slip and {3. 3. 2}〈1. 1. 3〉 twinning was found to be effective for achieving high yield strength and large uniform elongation in the β type Ti-15Mo-5Zr and Ti-10Mo-2Fe alloys in the as-solution treated condition, where the Mo equivalency was designed to be between 15.3 and 18.7. mass%. The high yield strength was caused mainly by the slip, and the large uniform elongation was caused by the twinning through significant work hardening. The change in the work hardening rate with strain correlated well with the formation of mechanical twins. The deformation was heterogeneous among the grains and the twins were not seen in some of the grains even after the tensile fracture. This heterogeneity was discussed based on the effects of the grain orientation and the segregation of alloying elements.
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U2 - 10.1016/j.msea.2011.02.071
DO - 10.1016/j.msea.2011.02.071
M3 - Article
AN - SCOPUS:79953289310
VL - 528
SP - 4569
EP - 4578
JO - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
JF - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
SN - 0921-5093
IS - 13-14
ER -