On the elastocaloric effect in CuAlBe shape memory alloys: A quantitative phase-field modeling approach

Cissé, Cheikh; Zaeem, Mohsen Asle

doi:10.1016/j.commatsci.2020.109808

Cited by 18 publications

(14 citation statements)

References 72 publications

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“…( 65), it is possible that the transforming mass is becoming smaller than the mass of a single atom or molecule or the mass of n atoms, which undergo thermal fluctuations. This should be avoided by the constraint (68), which changes the equations in Box 5 to those in Box 8. It is taken into account in Eqs.…”

Section: Kinetic Equation For An Interface Propagationmentioning

confidence: 99%

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Phase transformations, fracture, and other structural changes in inelastic materials

Levitas

2021

International Journal of Plasticity

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Section: Kinetic Equation For An Interface Propagationmentioning

confidence: 99%

“…In [67,68,74,76,140,324,[460][461][462] the PFA to martensitic PTs is combined with the classical isotropic plasticity and applied to the growth of martensite. All the above approaches to the interaction between PTs and plasticity were for small strains.…”

Section: Pfa To the Interaction Of Phase Transformation And Dislocationsmentioning

confidence: 99%

Phase transformations, fracture, and other structural changes in inelastic materials

Levitas

2021

International Journal of Plasticity

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“…To reduce the martensitic transformation temperature of the Ni 50 Mn 50 prototype alloy, the effect of Ga substitution for Mn was first explored. Figure 1a displays the DSC curves for the Ni 50 Mn 50−x Ga x (x = 0, 2, 4, 6,8,10,12,14,16,18,20,22) alloys. For the Ni 50 Mn 50 alloy, the martensitic transformation occurs at very high temperatures, i.e., M s = 971 K, M f = 930 K, A s = 974 K, and A f = 1022 K, being consistent with the results in the literature.…”

Section: Methodsmentioning

confidence: 99%

“…To identify the phase constituent at room temperature, XRD measurements were performed on the Ni 50 Mn 50−x Ga x (x = 0, 2, 4, 6,8,10,12,14,16,18,20,22) alloys. Typical XRD patterns for the alloys with x = 2, 10, 14, 20, 22 are displayed in Figure 2.…”

Section: Methodsmentioning

confidence: 99%

Giant Elastocaloric Effect in Ni-Mn-Ga-Based Alloys Boosted by a Large Lattice Volume Change upon the Martensitic Transformation

Liu

Zhang

et al. 2021

ACS Appl. Mater. Interfaces

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High-performance elastocaloric materials are highly sought in developing energy-efficient and environmentally friendly solid-state elastocaloric refrigeration. Here, we present an effective strategy to achieve a giant elastocaloric response by enlarging the lattice volume change ΔV/V 0 upon the martensitic transformation. Using the Ni 50 Mn 50 binary alloy as the prototype, a large transformation entropy change ΔS tr can be tailored in the vicinity of room temperature by simultaneously doping Cu and Ga. Especially, the |ΔS t r | values in the ⟨001⟩ A -textured Ni 30 Cu 20 Mn 39.5 Ga 10.5 and Ni 30 Cu 20 Mn 39 Ga 11 alloys prepared by directional solidification can be as large as 47.5 and 46.7 Jkg −1 K −1 , respectively, due to the significant ΔV/V 0 values, i.e., 1.81 and 1.82%, respectively. Such enhanced ΔS tr values thus yield giant ΔT ad values of up to −23.5 and −19.3 K on removing the compressive stress in these two alloys, being much higher than those in Heusler-type alloys reported previously. Moreover, owing to the relatively low driving stress endowed by the highly textured microstructure, the specific adiabatic temperature change (|ΔT ad /Δσ max |) in the present work can be as large as 77.2 K/GPa. This work is expected to provide new routes in designing high-performance elastocaloric materials with the combination of a giant elastocaloric response and low driving stress.

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“…[2,[8][9][10] The eCE utilizes the phase transformation latent heat when external uniaxial stress is rapidly applied or removed to realize heating or refrigeration. [11][12][13][14] This enables one to achieve up to %75% of the energy efficiencies in solid-state cooling, making it one of the most promising non-vapor compression cooling technologies according to the US Department of Energy. [3,7,[15][16][17] The core problem of refrigeration systems is the appropriate choice of refrigerant.…”

Section: Introductionmentioning

confidence: 99%

Large Elastocaloric Effect in Fe‐Doped Co–Fe–V–Ga Shape Memory Alloys

Xuan

Wang

et al. 2022

Physica Status Solidi (a)

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Herein, the impact of Fe substitution for Co on martensitic transformation (MT), crystal structure, elastocaloric effect (eCE), and mechanical characteristics in Co51V34Ga15 shape memory alloys (SMAs) is systematically investigated. The temperatures of MT are found to be properly adjusted by varying the Fe content in Co51−xFexV34Ga15 (x = 0, 0.3, and 0.6) alloys, shifting toward the lower values as the Fe concentration increases. Furthermore, alloying with Fe is shown to significantly improve the eCE and superelastic properties of these alloys. Under the uniaxial stress of 600 MPa, the Co50.7Fe0.3V34Ga15 alloy exhibits a significant adiabatic temperature drop of −9.5 K under adiabatic cooling conditions. Moreover, it demonstrates good stability during the cycling test with a stable temperature change of −6.6 K remaining nearly constant after 420 cycles under 500 MPa. Additionally, a maximum compressive strength of approximately 1500 MPa is achieved in the Co50.7Fe0.3V34Ga15 alloy, which makes it the promising candidate for multifunctional materials.

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On the elastocaloric effect in CuAlBe shape memory alloys: A quantitative phase-field modeling approach

Cited by 18 publications

References 72 publications

Phase transformations, fracture, and other structural changes in inelastic materials

Phase transformations, fracture, and other structural changes in inelastic materials

Giant Elastocaloric Effect in Ni-Mn-Ga-Based Alloys Boosted by a Large Lattice Volume Change upon the Martensitic Transformation

Large Elastocaloric Effect in Fe‐Doped Co–Fe–V–Ga Shape Memory Alloys

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