Open AccessThermal Stability of the R Phase of a Rapidly Solidified Ti-47.3Ni (at%) Alloy
Author(s) -
Hyo-jung Moon,
Su-jin Chun,
Tae-Hyun Nam,
Yig Liu,
Hong Yang,
Yeonwook Kim
Publication year - 2012
Publication title -
transactions on electrical and electronic materials/transactions on electrical and electronic materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.201
H-Index - 18
eISSN - 2092-7592
pISSN - 1229-7607
DOI - 10.4313/teem.2012.13.1.19
Subject(s) - materials science , alloy , differential scanning calorimetry , annealing (glass) , transmission electron microscopy , volume fraction , diffusionless transformation , thermal stability , shape memory alloy , microstructure , crystallography , martensite , metallurgy , composite material , chemical engineering , thermodynamics , nanotechnology , physics , chemistry , engineering
Transformation behavior of rapidly solidified Ti-47.3Ni (at%) alloy ribbons and thermal stability of the R phase in theribbons were investigated by means of differential scanning calorimetry (DSC), X-ray diffraction, and transmissionelectron microscopy. Rapidly solidified Ti-47.3Ni alloy ribbons showed the two-stage B2-R-B19' martensitictransformation behavior. The B2-R transformation in the ribbons was observed even after annealing at 1,223 K,which was attributed to the fact that a specific orientation relationship between Ti2Ni and matrix in the ribbons ismaintained after annealing at 1,223 K. The DSC peak temperature of the B2-R transformation (TR*) decreased withraising annealing temperature, which was attributed to the increased volume fraction of Ti2Ni, thus causing anincreased Ni content in the matrix