TY - JOUR
T1 - Changes in microstructure near the R-phase transformation in Ti50Ni48Fe2 studied by in-situ electron microscopy
AU - Murakami, Y.
AU - Shindo, D.
PY - 2001/9
Y1 - 2001/9
N2 - Microstructural changes associated with the martensitic transformation from cubic (parent phase) to trigonal (R phase) which occurs with decreasing temperature in Ti50Ni48Fe2 have been intensively studied by in-situ electron microscopy. Although the parent phase shows a characteristic microstructure with small domains, which are due to lattice modulation as a precursor to the transformation, their temperature dependence is contrasted with that of domains which appear below the transformation temperature in the R phase. The observations convince us that there is an essential difference between the natures of the domains observed in each state, and also reveal the formation of peculiar antiphase-like boundaries within a needle-like variant of the R phase. We also estimate the approximate size of the R phase just after nucleation and compare this with a theoretical consideration on the size of nuclei in martensites.
AB - Microstructural changes associated with the martensitic transformation from cubic (parent phase) to trigonal (R phase) which occurs with decreasing temperature in Ti50Ni48Fe2 have been intensively studied by in-situ electron microscopy. Although the parent phase shows a characteristic microstructure with small domains, which are due to lattice modulation as a precursor to the transformation, their temperature dependence is contrasted with that of domains which appear below the transformation temperature in the R phase. The observations convince us that there is an essential difference between the natures of the domains observed in each state, and also reveal the formation of peculiar antiphase-like boundaries within a needle-like variant of the R phase. We also estimate the approximate size of the R phase just after nucleation and compare this with a theoretical consideration on the size of nuclei in martensites.
UR - http://www.scopus.com/inward/record.url?scp=0035467415&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0035467415&partnerID=8YFLogxK
U2 - 10.1080/09500830110063950
DO - 10.1080/09500830110063950
M3 - Article
AN - SCOPUS:0035467415
VL - 81
SP - 631
EP - 638
JO - Philosophical Magazine Letters
JF - Philosophical Magazine Letters
SN - 0950-0839
IS - 9
ER -