ATOM POSITIONS IN THE R-PHASE UNIT-CELL IN TINI SHAPE-MEMORY ALLOY

Authors
CHEN Q KNOWLES KM HUMPHREYS CJ WU XF
Citation
Q. Chen et al., ATOM POSITIONS IN THE R-PHASE UNIT-CELL IN TINI SHAPE-MEMORY ALLOY, Journal of Materials Science, 31(16), 1996, pp. 4227-4231
Citations number
23
Categorie Soggetti
Material Science
Journal title
Journal of Materials Science → ACNP
ISSN journal
00222461
Volume
31
Issue
16
Year of publication
1996
Pages
4227 - 4231
Database
ISI
SICI code
0022-2461(1996)31:16<4227:APITRU>2.0.ZU;2-F
Abstract
A crystallographic analysis of the atom positions in the unit cell of the R-phase of the TiNi shape memory alloy has been performed. In addi tion to a homogeneous shape change the atoms are found to shuffle in t he [111](B2) and [-211](B2) directions during the B2 to R-phase transf ormation. The origin of these shuffles is found to be a complex intera ction between [110][1-10] transverse acoustic and [111] longitudinal a coustic soft phonon modes.