In-situ X-ray diffraction studies of the phase transformations and structural states of B2, R and B19′ phases in Ti{sub 49.5}Ni{sub 50.5} alloy

Journal Article · Tue Oct 27 00:00:00 EDT 2015 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.4932860· OSTI ID:22492575

Ostapenko, Marina G., E-mail: [e-mail] ^[1]; National Research Tomsk Polytechnic University, Tomsk, 634050 ^[2]; Meisner, Ludmila L., E-mail: [e-mail] ^[1]; National Research Tomsk State University, Tomsk, 634050 ^[2]; Lotkov, Aleksandr I., E-mail: [e-mail]; Gudimova, Ekaterina Y., E-mail: [e-mail] ^[1]; Zakharova, Margarita A., E-mail: [e-mail] ^[3]

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1. Institute of Strength Physics and Materials Science SB RAS, Tomsk, 634055 (Russian Federation)
2. (Russian Federation)
3. National Research Tomsk Polytechnic University, Tomsk, 634050 (Russian Federation)

The martensitic transformation, Debye–Waller factor, mean-square atomic displacements and the coefficient of thermal expansion on cooling of the Ti{sub 49.5}Ni{sub 50.5} shape memory alloy were examined using in-situ X-ray diffraction. It was revealed B2→R (T{sub R} ≡ T = 273 ± 10 K) along with B2→B19’ (M{sub s} ≡ T = 273 ± 10 K) transitions occur. It was found that Debye–Waller factor and mean-square displacement of B2 phase undergo significant increase as functions of temperature when phase transition B2→R and B2→B19’ take place. The analysis of the thermal expansion coefficient of the B2 phase indicates that the value of a increases almost linearly while cooling.

• OSTI ID: 22492575
• Journal Information: AIP Conference Proceedings, Vol. 1683, Issue 1; Conference: International conference on advanced materials with hierarchical structure for new technologies and reliable structures 2015, Tomsk (Russian Federation), 21-25 Sep 2015; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ATOMIC DISPLACEMENTS
COOLING
DEBYE-WALLER FACTOR
NICKEL ALLOYS
PHASE TRANSFORMATIONS
SHAPE MEMORY EFFECT
TEMPERATURE DEPENDENCE
THERMAL EXPANSION
TITANIUM ALLOYS
X-RAY DIFFRACTION