Effect of Thermal Cycling on Martensitic Transformation Characteristics of (Ni47Ti44)100-xNbx Shape Memory Alloys

Journal Article · Fri Mar 31 04:00:00 EST 2006 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.2192328· OSTI ID:20800159

He, X M; Yan, D S; Rong, L J; Li, Y Y ^[1]

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1. Institute of Metal Research, Chinese Academy of Science, Shenyang, 110016 (China)

(Ni47Ti44)100-xNbx (x=3, 9, 15, 20, 30at.%) shape memory alloys are prepared and their transformation temperatures and transformation latent heats under conditions of various thermal cycling times are systematically investigated by differential scanning calorimeter (DSC). It is found that the martensitic transformation behavior in the experimented alloys are strong influenced by the Nb-content and thermal cycling times. The results showed that the transformation temperatures of experimented alloys decreased with increase of the cycling number, and the lower the Nb-content in the (Ni47Ti44)100-xNbx alloy, the more the Ms temperature decreased. With increasing of the thermal cycling times, the martensitic transformation latent heats ( {delta} H B2{yields}B19' ) and the reverse transformation latent heats ({delta} H B19'{yields}B2) of (Ni47Ti44)100-xNbx alloys all linearly decrease, but the decrease amplitude is not high.

• OSTI ID: 20800159
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 824; ISSN 0094-243X; ISSN APCPCS
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CALORIMETRY
CONCENTRATION RATIO
HEAT
NICKEL ALLOYS
NIOBIUM ALLOYS
PHASE TRANSFORMATIONS
SHAPE MEMORY EFFECT
THERMAL CYCLING
TITANIUM ALLOYS