Isothermal Martensitic Transformations in an Aged Ni-Rich Ti-Ni Alloy Containing Coherent Ti3Ni4 Particles

Hiroshi Akamine; Yohei Soejima; Tadaaki Nakamura; Farjami Sahar; Takashi Fukuda; Tomoyuki Kakeshita; Minoru Nishida

doi:10.2320/matertrans.MT-MJ2019004

Isothermal Martensitic Transformations in an Aged Ni-Rich Ti-Ni Alloy Containing Coherent Ti₃Ni₄ Particles

Hiroshi Akamine, Yohei Soejima, Tadaaki Nakamura, Farjami Sahar, Takashi Fukuda, Tomoyuki Kakeshita, Minoru Nishida

Materials Physics and Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

The time dependence nature of B2 (ordered cubic) to R (trigonal) and R to B19A (monoclinic) martensitic transformations in an aged Ni-rich Ti-Ni alloy was investigated by electrical resistivity measurements. Both B2 to R and R to B19A transformations exhibit time dependence nature in the aged alloy containing coherent lenticular Ti₃Ni₄ precipitates with an average diameter of about 110 nm. However, the successive B2-R-B19A isothermal transformation is not detected by electrical resistivity measurements. The isothermal R-B19A transformation is visualized by in situ scanning electron microscopy (SEM) observations.

Original language	English
Pages (from-to)	37-41
Number of pages	5
Journal	Materials Transactions
Volume	61
Issue number	1
DOIs	https://doi.org/10.2320/matertrans.MT-MJ2019004
Publication status	Published - 2020

All Science Journal Classification (ASJC) codes

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

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title = "Isothermal Martensitic Transformations in an Aged Ni-Rich Ti-Ni Alloy Containing Coherent Ti3Ni4 Particles",

abstract = "The time dependence nature of B2 (ordered cubic) to R (trigonal) and R to B19A (monoclinic) martensitic transformations in an aged Ni-rich Ti-Ni alloy was investigated by electrical resistivity measurements. Both B2 to R and R to B19A transformations exhibit time dependence nature in the aged alloy containing coherent lenticular Ti3Ni4 precipitates with an average diameter of about 110 nm. However, the successive B2-R-B19A isothermal transformation is not detected by electrical resistivity measurements. The isothermal R-B19A transformation is visualized by in situ scanning electron microscopy (SEM) observations.",

author = "Hiroshi Akamine and Yohei Soejima and Tadaaki Nakamura and Farjami Sahar and Takashi Fukuda and Tomoyuki Kakeshita and Minoru Nishida",

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T1 - Isothermal Martensitic Transformations in an Aged Ni-Rich Ti-Ni Alloy Containing Coherent Ti3Ni4 Particles

AU - Akamine, Hiroshi

AU - Soejima, Yohei

AU - Nakamura, Tadaaki

AU - Sahar, Farjami

AU - Fukuda, Takashi

AU - Kakeshita, Tomoyuki

AU - Nishida, Minoru

PY - 2020

Y1 - 2020

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AB - The time dependence nature of B2 (ordered cubic) to R (trigonal) and R to B19A (monoclinic) martensitic transformations in an aged Ni-rich Ti-Ni alloy was investigated by electrical resistivity measurements. Both B2 to R and R to B19A transformations exhibit time dependence nature in the aged alloy containing coherent lenticular Ti3Ni4 precipitates with an average diameter of about 110 nm. However, the successive B2-R-B19A isothermal transformation is not detected by electrical resistivity measurements. The isothermal R-B19A transformation is visualized by in situ scanning electron microscopy (SEM) observations.

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