TY - JOUR
T1 - Effect of uniform distribution of α phase on mechanical, shape memory and pseudoelastic properties of Ti-6Cr-3Sn alloy
AU - Wadood, A.
AU - Inamura, T.
AU - Yamabe-Mitarai, Y.
AU - Hosoda, H.
PY - 2012/10/15
Y1 - 2012/10/15
N2 - Recently, among our developed Ti-Cr-3Sn alloys, the Ti-6Cr-3Sn alloy exhibited good mechanical, shape memory and pseudoelastic properties. However, the shape memory effect was incomplete, the pseudoelastic recovered strain was small and the ultimate tensile strength (UTS) was low. Therefore, in this study, the effect of a step heat treatment at 973. K (SHT973K) in the (α. +. β) region with the purpose of creating a uniform distribution of the α phase in the β phase matrix using ω phase precursors was investigated. It was determined that the step heat treatment in the 973. K (α. +. β) region was effective for improving the strength, shape memory and pseudoelastic properties of the Ti-6Cr-3Sn alloy due to the uniform distribution of the α phase in the β phase matrix, which resulted in a more effective increase in the critical stress for slip deformation. It is concluded that the uniform distribution of the α phase in the β matrix is an excellent method for improving the mechanical, shape memory and pseudoelastic properties of ω-sensitive β Ti alloys.
AB - Recently, among our developed Ti-Cr-3Sn alloys, the Ti-6Cr-3Sn alloy exhibited good mechanical, shape memory and pseudoelastic properties. However, the shape memory effect was incomplete, the pseudoelastic recovered strain was small and the ultimate tensile strength (UTS) was low. Therefore, in this study, the effect of a step heat treatment at 973. K (SHT973K) in the (α. +. β) region with the purpose of creating a uniform distribution of the α phase in the β phase matrix using ω phase precursors was investigated. It was determined that the step heat treatment in the 973. K (α. +. β) region was effective for improving the strength, shape memory and pseudoelastic properties of the Ti-6Cr-3Sn alloy due to the uniform distribution of the α phase in the β phase matrix, which resulted in a more effective increase in the critical stress for slip deformation. It is concluded that the uniform distribution of the α phase in the β matrix is an excellent method for improving the mechanical, shape memory and pseudoelastic properties of ω-sensitive β Ti alloys.
KW - Mechanical characterization
KW - Phase transformation
KW - Precipitation
KW - Shape memory
KW - Titanium alloys
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UR - http://www.scopus.com/inward/citedby.url?scp=84864594462&partnerID=8YFLogxK
U2 - 10.1016/j.msea.2012.06.029
DO - 10.1016/j.msea.2012.06.029
M3 - Article
AN - SCOPUS:84864594462
SN - 0921-5093
VL - 555
SP - 28
EP - 35
JO - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
JF - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
ER -