Effect of heat treatment conditions on multistage martensitic transformation in aged Ni-rich Ti-Ni alloys

Minoru Nishida; Toru Hara; Yasuhiro Morizono; Mitsuhiro Matsuda; Kousuke Fujishima

Effect of heat treatment conditions on multistage martensitic transformation in aged Ni-rich Ti-Ni alloys

Minoru Nishida, Toru Hara, Yasuhiro Morizono, Mitsuhiro Matsuda, Kousuke Fujishima

Research output: Contribution to journal › Conference article › peer-review

Abstract

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.

Original language	English
Article number	S5.1
Pages (from-to)	365-370
Number of pages	6
Journal	Materials Research Society Symposium Proceedings
Volume	842
Publication status	Published - Aug 25 2005
Externally published	Yes
Event	2004 MRS Fall Meeting - Boston, MA, United States Duration: Nov 29 2004 → Dec 1 2004

All Science Journal Classification (ASJC) codes

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

Cite this

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title = "Effect of heat treatment conditions on multistage martensitic transformation in aged Ni-rich Ti-Ni alloys",

abstract = "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.",

author = "Minoru Nishida and Toru Hara and Yasuhiro Morizono and Mitsuhiro Matsuda and Kousuke Fujishima",

year = "2005",

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day = "25",

language = "English",

volume = "842",

pages = "365--370",

journal = "Materials Research Society Symposium - Proceedings",

issn = "0272-9172",

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note = "2004 MRS Fall Meeting ; Conference date: 29-11-2004 Through 01-12-2004",

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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 -

Effect of heat treatment conditions on multistage martensitic transformation in aged Ni-rich Ti-Ni alloys

Abstract

All Science Journal Classification (ASJC) codes

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