Effect of hydrostatic pressure on the martensitic transformation in CuZnAl(Mn) shape memory alloys

Daróczi, Lajos; Beke, Dezső L.; Lexcellent, Christian; Mertinger, Valéria

doi:10.1016/s1359-6462(00)00466-8

Cited by 19 publications

(12 citation statements)

References 14 publications

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“…doi:10. 1016/j.ijsolstr.2008.01.027 papers have been published on the effect of hydrostatic pressure on the thermomechanical behaviour of SMs (Daroczi et al, 2000;Kakeshita et al, 1992;Johari et al, 1996;Gefen et al, 1973). The role of high pressure in influencing phase transitions and in unraveling transition mechanism is very well known (James and Schilling, 1998;Zengin and Yakuphanoglu, 2003;Tatar and Yakuphanoglu, 2005).…”

Section: Introductionmentioning

confidence: 99%

Investigation of the effect of pressure on some physical parameters and thermoelastic phase transformation of NiAl alloy

Kazanç

Tatar

2008

International Journal of Solids and Structures

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The Ni-Al alloys which exhibit the thermoelastic phase transformations in the composition range from 60 to 65 atomic percentage of Ni are widely used in the high technology applications. In this study, thermoelastic phase transformations of Ni-37.5 at.% Al alloys at 0, 1 and 2 GPa pressures were investigated by using MD simulation. Physical interactions among atoms in the alloy system were modelled using Sutton-Chen version of the embedded atom method based on many-body interactions. The potential parameters for cross interactions between Ni and Al atoms were estimated by optimising the results obtained from the molecular dynamics simulations. Moreover, the effect of applied pressure on transformation temperatures, enthalpy, entropy and elastic energy of model alloy system were investigated. The obtained result showed that the transformation temperature increased with applied pressure while enthalpy, entropy and elastic energy decreased. The values of the thermodynamical parameters that obtained in this study are in very good agreement with results of experimental studies.

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Section: Introductionmentioning

confidence: 99%

Investigation of the effect of pressure on some physical parameters and thermoelastic phase transformation of NiAl alloy

Kazanç

Tatar

2008

International Journal of Solids and Structures

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“…Thus from the TðÞ functions the T # ðÞ and T " ðÞ were obtained and, according to (8) and (9), the eðÞ þ T 0 ð0ÞÁs c as well as the dðÞ function were constructed at different stress levels. It is worth noting that while the determination of T # ðÞ and T " ðÞ between ¼ 0:1 and ¼ 0:9 is easy, the error in reading for !…”

Section: Discussionmentioning

confidence: 99%

“…, which were used in our previous papers [7][8][9][10][11] for the determination of the derivatives of dissipative and elastic free energy contributions from experimental data at the start and finish of the martensitic transformation as a function of * Graduate Student, University of Debrecen uniaxial stress and/or hydrostatic pressure.…”

Section: Derivatives Of the Free Energy Contributionsmentioning

confidence: 99%

Method for the Determination of Non-Chemical Free Energy Contributions as a Function of the Transformed Fraction at Different Stress Levels in Shape Memory Alloys

2005

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General equations allowing the determination of the elastic and dissipative energy contributions, as the function of the transformed fraction, , to the martensitic transformation in shape memory alloys are derived. It is shown that the derivatives of these energies by can be calculated from the measured hysteresis loops. It is illustrated, by the example of our previous experimental results obtained on CuAlNi shape memory alloys at different stress levels, , that our evaluation method gives consistent results with those obtained form the DSC measurements. Furthermore, the -and -dependence of the above derivatives as well as their integral values for (0,1) and (1,0) intervals, i.e. the dissipated energy and the elastic energy stored and released during the forward and reverse transformations, are determined as the function of stress.

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“…[9,10] and [11]) offering a simple form of the elastic and dissipative energy contributions to the start and finish parameters [3][4][5][6][7][8]. The total change of the Gibbs free energy versus the transformed martensite fraction (if the hydrostatic pressure and the magnetic field are zero), for the A/M transformation (denoted by  ), can be written in the form [3,8]: …”

Section: Description Of the Modelmentioning

confidence: 99%

“…In this review we will summarize our model [3][4][5][6][7][8] for the thermal hysteresis loops, =(T) (at constant other driving fields such as uniaxial stress, , magnetic field, B, or pressure, p) in terms of To, and the derivatives S/=s, E/=e and D/=d, where  is the martensite transformed (volume) fraction. (In the following quantities given by small letters denote the quantity belonging to unit volume fraction.)…”

Section: Introductionmentioning

confidence: 99%

Determination of Elastic and Dissipative Energy Contributions to Martensitic Phase Transformation in Shape Memory Alloys

Beke¹,

Daróczi²,

Elrasasi³

2013

Shape Memory Alloys - Processing, Characterization and Applications

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Effect of hydrostatic pressure on the martensitic transformation in CuZnAl(Mn) shape memory alloys

Cited by 19 publications

References 14 publications

Investigation of the effect of pressure on some physical parameters and thermoelastic phase transformation of NiAl alloy

Investigation of the effect of pressure on some physical parameters and thermoelastic phase transformation of NiAl alloy

Method for the Determination of Non-Chemical Free Energy Contributions as a Function of the Transformed Fraction at Different Stress Levels in Shape Memory Alloys

Determination of Elastic and Dissipative Energy Contributions to Martensitic Phase Transformation in Shape Memory Alloys

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