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

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13 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 languageEnglish
Pages (from-to)133-140
Number of pages8
JournalActa Materialia
Volume59
Issue number1
DOIs
Publication statusPublished - 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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