TY - JOUR
T1 - Transition of multi-deformation modes in Ti-10Mo alloy with oxygen addition
AU - Min, X. H.
AU - Emura, S.
AU - Tsuchiya, K.
AU - Nishimura, T.
AU - Tsuzaki, K.
PY - 2014/1/10
Y1 - 2014/1/10
N2 - Microstructure, crevice corrosion resistance, and tensile deformation mode were investigated in Ti-10Mo- xO alloys (x=0.1, 0.2, 0.3 and 0.4 mass%). Along with a β parent phase, an athermal ω phase was found to be present in each alloy without a significant difference in its diffraction peak within X-ray diffraction profiles. Thermally induced α″ martensite was also observed in the alloy with high oxygen content, implying that the formation of thermally induced α″ martensite was enhanced by increasing oxygen content. All four alloys exhibited a high degree of crevice corrosion resistance within a hot (373. K) chloride-rich highly acidic solution. Room-temperature tensile testing of the alloys, with oxygen content ranging from 0.1 mass% to 0.4 mass%, revealed that tensile strength ranged from 739. MPa to 1035. MPa and that total elongation ranged from 46% to 6%. An examination of deformation microstructures by electron backscattered diffraction indicated that with increasing oxygen content, the deformation mode underwent a transition from stress-induced α″ martensitic transformation to {332}〈113〉 mechanical twinning and further on to dislocation slip, leading to an increase in strength but a decrease in ductility.
AB - Microstructure, crevice corrosion resistance, and tensile deformation mode were investigated in Ti-10Mo- xO alloys (x=0.1, 0.2, 0.3 and 0.4 mass%). Along with a β parent phase, an athermal ω phase was found to be present in each alloy without a significant difference in its diffraction peak within X-ray diffraction profiles. Thermally induced α″ martensite was also observed in the alloy with high oxygen content, implying that the formation of thermally induced α″ martensite was enhanced by increasing oxygen content. All four alloys exhibited a high degree of crevice corrosion resistance within a hot (373. K) chloride-rich highly acidic solution. Room-temperature tensile testing of the alloys, with oxygen content ranging from 0.1 mass% to 0.4 mass%, revealed that tensile strength ranged from 739. MPa to 1035. MPa and that total elongation ranged from 46% to 6%. An examination of deformation microstructures by electron backscattered diffraction indicated that with increasing oxygen content, the deformation mode underwent a transition from stress-induced α″ martensitic transformation to {332}〈113〉 mechanical twinning and further on to dislocation slip, leading to an increase in strength but a decrease in ductility.
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U2 - 10.1016/j.msea.2013.10.010
DO - 10.1016/j.msea.2013.10.010
M3 - Article
AN - SCOPUS:84886731113
VL - 590
SP - 88
EP - 96
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
ER -