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- Title
Two-Step Martensitic Transformation in an Aged Ti<sub>50</sub>Ni<sub>15</sub>Pd<sub>25</sub>Cu<sub>10</sub> High Temperature Shape Memory Alloys.
- Authors
REHMAN, S. U.; KHAN, M.; NUSAIR KHAN, A.; ALI, L.; IMRAN JAFFERY, S. H.
- Abstract
Multi-step martensitic transformation in an aged Ni-rich binary NiTi shape memory alloy is considered as usual behavior during transformation from austenite to martensite phase; from (austenite) B2 to R-phase and then R-phase to B19′ (monoclinic). However, for equi-atomic NiTi-based quaternary high temperature shape memory alloy, two-step martensitic transformation was detected for the first time. The Ti50Ni15Pd25Cu10 high temperature shape memory alloys were investigated for the evolution of transformation temperatures at aging temperature of 550 °C and 700 °C. Aging at 550 °C for 6 h resulted in significant reduction of phase transformation temperatures. During forward transformation from austenite to martensite, two-step martensitic transformation B2 → R and R → B19 (orthorhombic) was observed. By aging the alloy at 700 °C for 6 h, no significant effect was found on phase transition behavior and transformation temperatures.
- Subjects
MARTENSITIC transformations; ALLOYS; AUSTENITE; MARTENSITE; TEMPERATURE
- Publication
Acta Physica Polonica: A, 2015, Vol 128, Issue 2B, pB-125
- ISSN
0587-4246
- Publication type
Article
- DOI
10.12693/APhysPolA.128.B-125