TY - GEN
T1 - Anomalous characteristics of Ti-Nb-Ta-Zr alloy for biomedical applications
AU - Niinomi, Mitsuo
AU - Nakai, Masaaki
AU - Akahori, Toshikazu
AU - Tsutsumi, Harumi
N1 - Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2010
Y1 - 2010
N2 - Negative thermal expansion, i.e. a type of shrinkage that occurs during heating, was observed in cold-rolled Ti-29Nb-13Ta-4.6Zr alloy (mass%) (TNTZ). The reduction ratio of cold rolling was systematically changed, and then the thermal expansion rate was measured using a dilatometer. The cyclicity of thermal expansion was also examined for the cold-rolled TNTZ. Further, the effect of oxygen content on the thermal expansion behavior of the cold rolled TNTZ was examined. With an increase in the reduction ratio of cold rolling, the thermal expansion rate of TNTZ cold-rolled parallel to the rolling direction (RD) decreases, but it increases in TNTZ cold-rolled parallel to the transverse direction (TD). The cyclicity of above-mentioned anomalous thermal expansion is observed in a temperature range below 473 K, but it is not observed when the specimen is heated to above 573 K in the first cycle. The oxygen suppresses the negative thermal expansion behavior of TNTZ.
AB - Negative thermal expansion, i.e. a type of shrinkage that occurs during heating, was observed in cold-rolled Ti-29Nb-13Ta-4.6Zr alloy (mass%) (TNTZ). The reduction ratio of cold rolling was systematically changed, and then the thermal expansion rate was measured using a dilatometer. The cyclicity of thermal expansion was also examined for the cold-rolled TNTZ. Further, the effect of oxygen content on the thermal expansion behavior of the cold rolled TNTZ was examined. With an increase in the reduction ratio of cold rolling, the thermal expansion rate of TNTZ cold-rolled parallel to the rolling direction (RD) decreases, but it increases in TNTZ cold-rolled parallel to the transverse direction (TD). The cyclicity of above-mentioned anomalous thermal expansion is observed in a temperature range below 473 K, but it is not observed when the specimen is heated to above 573 K in the first cycle. The oxygen suppresses the negative thermal expansion behavior of TNTZ.
KW - Biomedical applications
KW - Deformation-induced martensite
KW - Invar behavior
KW - Negative thermal expansion
KW - Oxygen
KW - Ti-Nb-Ta-Zr alloy
UR - http://www.scopus.com/inward/record.url?scp=75849120673&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=75849120673&partnerID=8YFLogxK
U2 - 10.4028/www.scientific.net/MSF.638-642.16
DO - 10.4028/www.scientific.net/MSF.638-642.16
M3 - Conference contribution
AN - SCOPUS:75849120673
SN - 0878492941
SN - 9780878492947
T3 - Materials Science Forum
SP - 16
EP - 21
BT - THERMEC 2009
A2 - Chandra, Tara
A2 - Chandra, Tara
A2 - Chandra, Tara
A2 - Wanderka, N.
A2 - Wanderka, N.
A2 - Wanderka, N.
A2 - Reimers, Walter
A2 - Reimers, Walter
A2 - Reimers, Walter
A2 - Ionescu, M.
A2 - Ionescu, M.
A2 - Ionescu, M.
PB - Trans Tech Publications Ltd
T2 - 6th International Conference on Processing and Manufacturing of Advanced Materials - THERMEC'2009
Y2 - 25 August 2009 through 29 August 2009
ER -