Effect of heat treatment conditions on multistage R and martensitic transformations in aged Ni-rich Ti-Ni alloys

Minoru Nishida, Yasuhiro Morizono, Kousuke Fujishima, Kentarou Ishiuchi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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 atmosphere. No multistage transformation occurs when the evaporation of Ti and/or Ni and the preferential oxidation of Ti 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, and is an artifact during the heat treatment, rather than intrinsic in nature. Effect of heat treatment condition on the multistage R-phase transformation (MRT) is also discussed.

Original languageEnglish
Title of host publicationProceedings of an International Conference on Solid-Solid Phase Transformations in Inorganic Materials 2005
EditorsJ.M. Howe, D.E. Laughlin, J.K. Lee, U. Dahmen, W.A. Soffa
Pages139-144
Number of pages6
Volume2
Publication statusPublished - 2005
Externally publishedYes
EventInternational Conference on Solid-Solid Phase Transformations in Inorganic Materials 2005 - Phoenix, AZ, United States
Duration: May 29 2005Jun 3 2005

Other

OtherInternational Conference on Solid-Solid Phase Transformations in Inorganic Materials 2005
CountryUnited States
CityPhoenix, AZ
Period5/29/056/3/05

Fingerprint

Martensitic transformations
Heat treatment
Purification
Quartz
Evaporation
Phase transitions
Oxidation
Experiments

All Science Journal Classification (ASJC) codes

  • Engineering(all)

Cite this

Nishida, M., Morizono, Y., Fujishima, K., & Ishiuchi, K. (2005). Effect of heat treatment conditions on multistage R and martensitic transformations in aged Ni-rich Ti-Ni alloys. In J. M. Howe, D. E. Laughlin, J. K. Lee, U. Dahmen, & W. A. Soffa (Eds.), Proceedings of an International Conference on Solid-Solid Phase Transformations in Inorganic Materials 2005 (Vol. 2, pp. 139-144)

Effect of heat treatment conditions on multistage R and martensitic transformations in aged Ni-rich Ti-Ni alloys. / Nishida, Minoru; Morizono, Yasuhiro; Fujishima, Kousuke; Ishiuchi, Kentarou.

Proceedings of an International Conference on Solid-Solid Phase Transformations in Inorganic Materials 2005. ed. / J.M. Howe; D.E. Laughlin; J.K. Lee; U. Dahmen; W.A. Soffa. Vol. 2 2005. p. 139-144.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Nishida, M, Morizono, Y, Fujishima, K & Ishiuchi, K 2005, Effect of heat treatment conditions on multistage R and martensitic transformations in aged Ni-rich Ti-Ni alloys. in JM Howe, DE Laughlin, JK Lee, U Dahmen & WA Soffa (eds), Proceedings of an International Conference on Solid-Solid Phase Transformations in Inorganic Materials 2005. vol. 2, pp. 139-144, International Conference on Solid-Solid Phase Transformations in Inorganic Materials 2005, Phoenix, AZ, United States, 5/29/05.
Nishida M, Morizono Y, Fujishima K, Ishiuchi K. Effect of heat treatment conditions on multistage R and martensitic transformations in aged Ni-rich Ti-Ni alloys. In Howe JM, Laughlin DE, Lee JK, Dahmen U, Soffa WA, editors, Proceedings of an International Conference on Solid-Solid Phase Transformations in Inorganic Materials 2005. Vol. 2. 2005. p. 139-144
Nishida, Minoru ; Morizono, Yasuhiro ; Fujishima, Kousuke ; Ishiuchi, Kentarou. / Effect of heat treatment conditions on multistage R and martensitic transformations in aged Ni-rich Ti-Ni alloys. Proceedings of an International Conference on Solid-Solid Phase Transformations in Inorganic Materials 2005. editor / J.M. Howe ; D.E. Laughlin ; J.K. Lee ; U. Dahmen ; W.A. Soffa. Vol. 2 2005. pp. 139-144
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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 atmosphere. No multistage transformation occurs when the evaporation of Ti and/or Ni and the preferential oxidation of Ti 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, and is an artifact during the heat treatment, rather than intrinsic in nature. Effect of heat treatment condition on the multistage R-phase transformation (MRT) is also discussed.

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