TY - GEN
T1 - Phase constitution and martensitic transformation behavior of Au-51Ti-18Co biomedical shape memory alloy heat-treated at 1173K to 1373K
AU - Buasri, Taywin
AU - Shim, Hyunbo
AU - Tahara, Masaki
AU - Inamura, Tomonari
AU - Goto, Kenji
AU - Kanetaka, Hiroyasu
AU - Yamabe-Mitarai, Yoko
AU - Hosoda, Hideki
N1 - Funding Information:
This work was supported by Grant-in-Aid for Scientific Research Kiban S 26220907 and Challenging Exploratory Research 26630343 from Japan Society for the Promotion of Science (JSPS).
Publisher Copyright:
© 2017 Trans Tech Publications, Switzerland.
PY - 2017
Y1 - 2017
N2 - Phase constitution and martensitic transformation behavior were investigated for a Au–51Ti–18Co alloy heat-treated at 1173 K to 1373 K for 3.6 ks. The Au–51Ti–18Co alloy was fabricated by Ar arc-melting technique and subsequently by hot-forging at 1423 K for 10.8 ks. X-ray diffraction analysis revealed that B2 parent phase, B19 martensite phase and AuTi3 simultaneously appeared regardless of the heat-treatment temperatures. By increasing the heat-treatment temperature, the volume fraction of AuTi3 was slightly reduced. Besides, the lattice transformation strain which was calculated from the precisely-determined lattice parameters was evaluated to be 7% in the Au–51Ti–18Co alloy in all the heat-treated conditions. This value is comparable to that of NiTi practical alloys. From differential scanning calorimetry (DSC) analysis, reverse martensitic transformation temperature was slightly increased with the heat-treatment temperature. From the lattice transformation strain point of views, the Au–51Ti–18Co has a large potential for novel biomedical shape memory alloy.
AB - Phase constitution and martensitic transformation behavior were investigated for a Au–51Ti–18Co alloy heat-treated at 1173 K to 1373 K for 3.6 ks. The Au–51Ti–18Co alloy was fabricated by Ar arc-melting technique and subsequently by hot-forging at 1423 K for 10.8 ks. X-ray diffraction analysis revealed that B2 parent phase, B19 martensite phase and AuTi3 simultaneously appeared regardless of the heat-treatment temperatures. By increasing the heat-treatment temperature, the volume fraction of AuTi3 was slightly reduced. Besides, the lattice transformation strain which was calculated from the precisely-determined lattice parameters was evaluated to be 7% in the Au–51Ti–18Co alloy in all the heat-treated conditions. This value is comparable to that of NiTi practical alloys. From differential scanning calorimetry (DSC) analysis, reverse martensitic transformation temperature was slightly increased with the heat-treatment temperature. From the lattice transformation strain point of views, the Au–51Ti–18Co has a large potential for novel biomedical shape memory alloy.
KW - AuTiCo
KW - Biomedical shape memory alloy
KW - Heat-treatment
KW - Lattice transformation strain
KW - Martensitic transformation
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U2 - 10.4028/www.scientific.net/MSF.879.256
DO - 10.4028/www.scientific.net/MSF.879.256
M3 - Conference contribution
AN - SCOPUS:85000580128
SN - 9783035711295
T3 - Materials Science Forum
SP - 256
EP - 261
BT - THERMEC 2016
A2 - Sommitsch, Christof
A2 - Ionescu, Mihail
A2 - Mishra, Brajendra
A2 - Mishra, Brajendra
A2 - Kozeschnik, Ernst
A2 - Chandra, T.
PB - Trans Tech Publications Ltd
T2 - 9th International Conference on Processing and Manufacturing of Advanced Materials, THERMEC 2016
Y2 - 29 May 2016 through 3 June 2016
ER -