In-situ observations of R-phase transformation in a Ti50Ni48Fe2 alloy by electron microscopy

T. Tamiya, D. Shindo, Y. Murakami, Y. Bando, K. Otsuka

Research output: Contribution to journalArticlepeer-review

35 Citations (Scopus)


The R-phase transformation in a Ti50Ni48Fe2 alloy was studied by in-situ electron microscopy with double-tilt cooling stages and an energy-filter, and the controversial incommensurability in the early stage of the transformation was examined by using imaging plates, which have high sensitivity and are easy to access to computer analysis. As a result, the transformation was shown to proceed in the following way. The R-phase transformation starts at Rs point, where the electrical resistance starts to increase, from the B2 parent phase with weak diffuse scattering to the commensurate R-phase with a sharp interface. Thus, the transformation is a first order throughout, and the temperature hysteresis represents the two-phase region of the B2 parent and the commensurate R-phase.

Original languageEnglish
Pages (from-to)714-723
Number of pages10
JournalMaterials Transactions, JIM
Issue number7
Publication statusPublished - Jul 1998
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Engineering(all)

Fingerprint Dive into the research topics of 'In-situ observations of R-phase transformation in a Ti<sub>50</sub>Ni<sub>48</sub>Fe<sub>2</sub> alloy by electron microscopy'. Together they form a unique fingerprint.

Cite this