TY - JOUR
T1 - Effect of heat treatment conditions on multistage martensitic transformation in aged Ni-rich Ti-Ni alloys
AU - Nishida, Minoru
AU - Hara, Toru
AU - Morizono, Yasuhiro
AU - Matsuda, Mitsuhiro
AU - Fujishima, Kousuke
PY - 2005/8/25
Y1 - 2005/8/25
N2 - It has been demonstrated with systematic experiments that the appearance and disappearance of multistage martensitic transformation (MMT) in aged Ni-rich Ti-Ni alloys depend on the heat treatment conditions. No multistage transformation occurs when the evaporation of Ti and Ni and/or the preferential oxidation of Ti in the specimen are prevented and the purification of heat treatment atmosphere in an evacuated quartz tube is achieved. The heterogeneity in precipitation morphology of the Ti3Ni4 phase, which is responsible for the multistage transformation can be suppressed with the regulation of heat treatment atmosphere as mentioned above. We have concluded that the multistage martensitic transformation in aged Ni-rich Ti-Ni alloys is extrinsic in nature, and is an artifact during the heat treatment.
AB - It has been demonstrated with systematic experiments that the appearance and disappearance of multistage martensitic transformation (MMT) in aged Ni-rich Ti-Ni alloys depend on the heat treatment conditions. No multistage transformation occurs when the evaporation of Ti and Ni and/or the preferential oxidation of Ti in the specimen are prevented and the purification of heat treatment atmosphere in an evacuated quartz tube is achieved. The heterogeneity in precipitation morphology of the Ti3Ni4 phase, which is responsible for the multistage transformation can be suppressed with the regulation of heat treatment atmosphere as mentioned above. We have concluded that the multistage martensitic transformation in aged Ni-rich Ti-Ni alloys is extrinsic in nature, and is an artifact during the heat treatment.
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M3 - Conference article
AN - SCOPUS:23844507166
SN - 0272-9172
VL - 842
SP - 365
EP - 370
JO - Materials Research Society Symposium - Proceedings
JF - Materials Research Society Symposium - Proceedings
M1 - S5.1
T2 - 2004 MRS Fall Meeting
Y2 - 29 November 2004 through 1 December 2004
ER -