Transmission electron microscopy of antiphase boundary-like structure of B19′ martensite in Ti-Ni shape memory alloy

M. Matsuda; K. Kuramoto; Y. Morizono; S. Tsurekawa; E. Okunishi; T. Hara; M. Nishida

doi:10.1016/j.actamat.2010.09.017

Transmission electron microscopy of antiphase boundary-like structure of B19′ martensite in Ti-Ni shape memory alloy

M. Matsuda, K. Kuramoto, Y. Morizono, S. Tsurekawa, E. Okunishi, T. Hara, M. Nishida

Materials Physics and Engineering

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

19 Citations (Scopus)

Abstract

An antiphase boundary (APB)-like structure of the B19′ martensite in Ti-Ni alloy was investigated by transmission electron microscopy. The APB-like structure shows atomic shifts on both the (0 1 0)_B19′ plane along the c-axis and the (0 0 1)_B19′ plane along the b-axis; a kind of ledge-and-step structure on the b-c plane, in addition to a displacement along the a-axis. The displacement vector can be expressed as R = 〈-0.1648 1/2 0.4328〉 in terms of the conventional atomic coordinates of Ti and Ni in the B19′ martensite. The APB-like structure is not inherited from APB in the B2 parent phase. We conclude that the APB-like structure is developed by accidental impingement of differently nucleated martensitic domains during the transformation. This structure is defined as a kind of stacking fault with an APB-like contrast.

Original language	English
Pages (from-to)	133-140
Number of pages	8
Journal	Acta Materialia
Volume	59
Issue number	1
DOIs	https://doi.org/10.1016/j.actamat.2010.09.017
Publication status	Published - Jan 2011

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Polymers and Plastics
Metals and Alloys

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10.1016/j.actamat.2010.09.017

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title = "Transmission electron microscopy of antiphase boundary-like structure of B19′ martensite in Ti-Ni shape memory alloy",

abstract = "An antiphase boundary (APB)-like structure of the B19′ martensite in Ti-Ni alloy was investigated by transmission electron microscopy. The APB-like structure shows atomic shifts on both the (0 1 0)B19′ plane along the c-axis and the (0 0 1)B19′ plane along the b-axis; a kind of ledge-and-step structure on the b-c plane, in addition to a displacement along the a-axis. The displacement vector can be expressed as R = 〈-0.1648 1/2 0.4328〉 in terms of the conventional atomic coordinates of Ti and Ni in the B19′ martensite. The APB-like structure is not inherited from APB in the B2 parent phase. We conclude that the APB-like structure is developed by accidental impingement of differently nucleated martensitic domains during the transformation. This structure is defined as a kind of stacking fault with an APB-like contrast.",

author = "M. Matsuda and K. Kuramoto and Y. Morizono and S. Tsurekawa and E. Okunishi and T. Hara and M. Nishida",

note = "Funding Information: This work was supported by a Grant-in-Aid for Scientific Research (B) from the Japanese Society for the Promotion of Science (JSPS), and a Grant-in-Aid for Young Scientists (B) from the Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan. The authors would like to express their sincere gratitude to Prof. M. Itakura of Kyushu University for his valuable comments.",

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language = "English",

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T1 - Transmission electron microscopy of antiphase boundary-like structure of B19′ martensite in Ti-Ni shape memory alloy

AU - Matsuda, M.

AU - Kuramoto, K.

AU - Morizono, Y.

AU - Tsurekawa, S.

AU - Okunishi, E.

AU - Hara, T.

AU - Nishida, M.

N1 - Funding Information: This work was supported by a Grant-in-Aid for Scientific Research (B) from the Japanese Society for the Promotion of Science (JSPS), and a Grant-in-Aid for Young Scientists (B) from the Ministry of Education, Culture, Sports, Science and Technology (MEXT), Japan. The authors would like to express their sincere gratitude to Prof. M. Itakura of Kyushu University for his valuable comments.

PY - 2011/1

Y1 - 2011/1

N2 - An antiphase boundary (APB)-like structure of the B19′ martensite in Ti-Ni alloy was investigated by transmission electron microscopy. The APB-like structure shows atomic shifts on both the (0 1 0)B19′ plane along the c-axis and the (0 0 1)B19′ plane along the b-axis; a kind of ledge-and-step structure on the b-c plane, in addition to a displacement along the a-axis. The displacement vector can be expressed as R = 〈-0.1648 1/2 0.4328〉 in terms of the conventional atomic coordinates of Ti and Ni in the B19′ martensite. The APB-like structure is not inherited from APB in the B2 parent phase. We conclude that the APB-like structure is developed by accidental impingement of differently nucleated martensitic domains during the transformation. This structure is defined as a kind of stacking fault with an APB-like contrast.

AB - An antiphase boundary (APB)-like structure of the B19′ martensite in Ti-Ni alloy was investigated by transmission electron microscopy. The APB-like structure shows atomic shifts on both the (0 1 0)B19′ plane along the c-axis and the (0 0 1)B19′ plane along the b-axis; a kind of ledge-and-step structure on the b-c plane, in addition to a displacement along the a-axis. The displacement vector can be expressed as R = 〈-0.1648 1/2 0.4328〉 in terms of the conventional atomic coordinates of Ti and Ni in the B19′ martensite. The APB-like structure is not inherited from APB in the B2 parent phase. We conclude that the APB-like structure is developed by accidental impingement of differently nucleated martensitic domains during the transformation. This structure is defined as a kind of stacking fault with an APB-like contrast.

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Transmission electron microscopy of antiphase boundary-like structure of B19′ martensite in Ti-Ni shape memory alloy

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