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MARTENSITIC TRANSITION ENTROPY CHANGE AND ELASTIC CONSTANTS OF Cu-Al-Be ALLOYS
- Source :
- Journal de Physique IV Proceedings, Journal de Physique IV Proceedings, EDP Sciences, 1991, 01 (C4), pp.C4-283-C5-288. ⟨10.1051/jp4:1991443⟩
- Publication Year :
- 1991
- Publisher :
- EDP Sciences, 1991.
-
Abstract
- Measurements of the enthalpy ([MATH]H) and entropy ([MATH]S) changes associated with the martensitic transformation of Cu-Al-Be single crystals of different compositions, were performed by differential scanning calorimetry. In addition, the elastic constants of the body-centered-cubic parent phase single crystals were measured as a function of temperature, using the ultrasonic pulse-echo frequency varying - phase detection method, and the value of the elastic anisotropy (A = C44/C') was computed at the martensitic transformation temperature. The results are in good agreement with a theoretical expression obtained according to models previously proposed, which relates [MATH]S to the elastic anisotropy of the parent phase at the martensitic transformation temperature.
- Subjects :
- 010302 applied physics
Materials science
Transition entropy
Enthalpy
General Physics and Astronomy
Thermodynamics
02 engineering and technology
021001 nanoscience & nanotechnology
01 natural sciences
Differential scanning calorimetry
[PHYS.HIST]Physics [physics]/Physics archives
Diffusionless transformation
Martensite
0103 physical sciences
Elastic anisotropy
Ultrasonic sensor
0210 nano-technology
Entropy (order and disorder)
Subjects
Details
- ISSN :
- 11554339 and 17647177
- Database :
- OpenAIRE
- Journal :
- Le Journal de Physique IV
- Accession number :
- edsair.doi.dedup.....9607436dd8e27370cc6cdb1ee1f5c9a4