The equilibrium of martensite shear stress at phase transitions in TiNi-based alloy

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The equilibrium of martensite shear stress at phase transitions in TiNi-based alloy	632 KB	Adobe Acrobat PDF	Read	Download
DOI Доступ к ресурсу на сайте издателя			10.5185/amlett.2015.5597

Title: The equilibrium of martensite shear stress at phase transitions in TiNi-based alloy
Creator: Gunther, Victor E.
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Kim, Ji-Soon
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Hodorenko, Valentina N.
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Chekalkin, Timofey L.
Date: 2015
DOI: 10.5185/amlett.2015.5597
Description: Thermoelastic martensitic transformations play a fundamental role in the shape memory effect and related phenomena. Owing to their unique crystallographic and thermomechanical behaviour, martensitic transformations have generated considerable research in the areas of crystallography, thermodynamics and mechanical behaviour. In the area of thermodynamics a theoretical approach is now added which provides the basis for thermoelastic behaviour through consideration of the Gibbs energy change. In this paper, the interrelation of internal elastic stresses and martensite shear stresses in phase transitions has been defined. A thermoelastic stress equilibrium equation for a wide range of martensitic transformation temperatures has been presented. On the basis of the calculations made, an estimation of dislocation defects formation energy for the TiNi-based alloy has been made. For TiNi-based composition made of TN-10 brand alloy, commercially produced for medical goals, the energy of vacancy formation is about 0.06 kcal/mol. The study and calculations are shown to make clear, using a new approach, the considering of phase transitions in terms of external and internal stresses.

Created: 13-10-2016

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Сибирский физико-технический институт The equilibrium of martensite shear stress at phase transitions in TiNi-based alloy