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Journal Articles

Prototype Progress Report: Elastocaloric Heat Pumps

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Jun Cui, Stefan Seelecke, Paul Motzki, Qingping Sun, Ichiro Takeuchi
AM&P Technical Articles (2024) 182 (3): 49–52.
DOI: https://doi.org/10.31399/asm.amp.2024-03.p049
Published: 01 April 2024
...Jun Cui; Stefan Seelecke; Paul Motzki; Qingping Sun; Ichiro Takeuchi Both shape memory and elastocaloric effects are related to the reversible martensitic phase transformation. For the shape memory effect, thermal energy is used to drive the material through the phase transformation and recover its...
Abstract
Both shape memory and elastocaloric effects are related to the reversible martensitic phase transformation. For the shape memory effect, thermal energy is used to drive the material through the phase transformation and recover its original shape. For the elastocaloric effect, mechanical energy is used to induce phase transformation, and the associated latent heat is used to pump heat for cooling or heating. Heat pumps based on the elastocaloric effect have a low environmental impact and are highly efficient. However, designing a prototype to harvest the full potential of the elastocaloric effect has been challenging. This article summarizes prototyping efforts undertaken by three different research groups.
View articletitled, Prototype Progress Report: <span class="search-highlight">Elastocaloric</span> Heat Pumps View PDF for article titled, Prototype Progress Report: <span class="search-highlight">Elastocaloric</span> Heat Pumps
Journal Articles

Do Shape Memory Alloys Have Standards?

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Douglas E. Nicholson, Othmane Benafan, Glen S. Bigelow, Dean Pick, Luca Fumagalli ...
AM&P Technical Articles (2025) 183 (2): 36–40.
DOI: https://doi.org/10.31399/asm.amp.2025-02.p036
Published: 01 March 2025
...) under development, seeks to quantify, assess, and standardize these parameters for SMA actuator material. FUTURE WORK The newest application field for SMA is the emerging technology field of elastocalorics. The elastocaloric effect is based on the release and absorption of latent heats during mechanical...
Abstract
A set of standardized material specifications and test methods now exists to evaluate and maintain quality in shape memory alloys used for medical devices and actuators. This article summarizes the ASTM standards applicable to shape memory technology in medical and actuation applications, and identifies areas requiring further standardization work.
View articletitled, Do Shape Memory Alloys Have Standards? View PDF for article titled, Do Shape Memory Alloys Have Standards?
Journal Articles

A Breakthrough in Solid-State Cooling Abilities of Shape Memory Alloys Enabled by 3D Printing

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Aaron P. Stebner, Huilong Hou, Ichiro Takeuchi
AM&P Technical Articles (2020) 178 (7): 38–40.
DOI: https://doi.org/10.31399/asm.amp.2020-07.p038
Published: 01 October 2020
... and is a frontrunner among the so-called alternative cooling technologies[3]. Shape-memory alloys are found to display a significant elastocaloric cooling effect; however, presence of hysteresis work lost in each cycle and cause of functional fatigue and eventual failure remains an open challenge. (a) (b) (c) 8 Fig...
Abstract
Laser melting of elastocaloric metals can create fatigue-resistant microstructures, which enables solid-state cooling technologies.
View articletitled, A Breakthrough in Solid-State Cooling Abilities of Shape Memory Alloys Enabled by 3D Printing View PDF for article titled, A Breakthrough in Solid-State Cooling Abilities of Shape Memory Alloys Enabled by 3D Printing