TY - GEN
T1 - Martensitic transformation and related properties of AuTi-FeTi pseudobinary alloys
AU - Aoki, Taku
AU - Tahara, Masaki
AU - Goto, Kenji
AU - Mitarai, Yoko
AU - Kanetaka, Hiroyasu
AU - Inamura, Tomonari
AU - Hosoda, Hideki
N1 - Copyright:
Copyright 2014 Elsevier B.V., All rights reserved.
PY - 2014
Y1 - 2014
N2 - The effects of Fe addition on martensitic transformation and mechanical properties of AuTi were investigated in this study. It was found that B2 parent phase is stabilized by the Fe addition and that AuTi can contain at least 20mol%Fe. The lattice deformation strain evaluated from θ-2θ X-ray diffraction analysis (XRD) is not significantly changed by the Fe addition. The decrease in Ms evaluated by differential scanning calorimetry (DSC) is -40K/mol%Fe. Tensile tests revealed that, with increasing Fe content, the yield stress decreases up to about 13mol%Fe, largely increases up to 15mol%Fe and then decreases gradually. By taking into account XRD and DSC results, these behaviors are judged to correspond to reorientation of martensite variants, stress induced martensitic transformation and slip deformation of parent phase, respectively. The values of dσSIMT/dCFe and dσSIMT/dT are evaluated to be -170MPa/mol%Fe and -4.3MPa/K, respectively. The elongation is degraded with increasing Fe content from 8% in AuTi (0mol%Fe, martensite phase) to 2% in AuTi- 20mol%Fe (parent phase) depending on the apparent phase.
AB - The effects of Fe addition on martensitic transformation and mechanical properties of AuTi were investigated in this study. It was found that B2 parent phase is stabilized by the Fe addition and that AuTi can contain at least 20mol%Fe. The lattice deformation strain evaluated from θ-2θ X-ray diffraction analysis (XRD) is not significantly changed by the Fe addition. The decrease in Ms evaluated by differential scanning calorimetry (DSC) is -40K/mol%Fe. Tensile tests revealed that, with increasing Fe content, the yield stress decreases up to about 13mol%Fe, largely increases up to 15mol%Fe and then decreases gradually. By taking into account XRD and DSC results, these behaviors are judged to correspond to reorientation of martensite variants, stress induced martensitic transformation and slip deformation of parent phase, respectively. The values of dσSIMT/dCFe and dσSIMT/dT are evaluated to be -170MPa/mol%Fe and -4.3MPa/K, respectively. The elongation is degraded with increasing Fe content from 8% in AuTi (0mol%Fe, martensite phase) to 2% in AuTi- 20mol%Fe (parent phase) depending on the apparent phase.
KW - AuTi
KW - FeTi
KW - Martensitic transformation
KW - Pseudobinary system
UR - http://www.scopus.com/inward/record.url?scp=84901494310&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84901494310&partnerID=8YFLogxK
U2 - 10.4028/www.scientific.net/AMR.922.25
DO - 10.4028/www.scientific.net/AMR.922.25
M3 - Conference contribution
AN - SCOPUS:84901494310
SN - 9783038350743
T3 - Advanced Materials Research
SP - 25
EP - 30
BT - THERMEC 2013 Supplement
PB - Trans Tech Publications Ltd
T2 - 8th International Conference on Processing and Manufacturing of Advanced Materials: Processing, Fabrication, Properties, Applications, THERMEC 2013
Y2 - 2 December 2013 through 6 December 2013
ER -