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Learning from Superelasticity Data to Search for Ti-Ni Alloys with Large Elastocaloric Effect

17 Pages Posted: 12 May 2021 Publication Status: Under Review

See all articles by Ding Lei

Ding Lei

Xi'an Jiaotong University (XJTU) - State Key Laboratory for Mechanical Behavior of Materials

Yumei Zhou

Xi'an Jiaotong University (XJTU) - State Key Laboratory for Mechanical Behavior of Materials

Yangyang Xu

Xi'an Jiaotong University (XJTU) - State Key Laboratory for Mechanical Behavior of Materials

Pengfei Dang

Xi'an Jiaotong University (XJTU) - State Key Laboratory for Mechanical Behavior of Materials

Xiangdong Ding

Xi'an Jiaotong University (XJTU) - State Key Laboratory for Mechanical Behavior of Materials

Jun Sun

Xi'an Jiaotong University (XJTU) - State Key Laboratory for Mechanical Behavior of Materials

Turab Lookman

Independent

Dezhen Xue

Xi'an Jiaotong University (XJTU) - State Key Laboratory for Mechanical Behavior of Materials

Abstract

In the present study, the reversible adiabatic temperature change (ΔTad) of shape memory alloys was shown to be proportional to the mechanical work released by the reverse martensitic transformation during unloading (ΔWu). As there exists a considerable amount of data (ΔWu) on superelastic stress-strain measurements in shape memory alloys, the proposed relationship allows us to predict ΔTad without caloric measurements. The estimated ΔTad from the ΔWu of different Ti-Ni alloys shows good linear relationship with the directly measured values. Moreover, following such a design criterion and by tuning of composition and thermo-mechanical treatment, a group of Ti-Ni binary shape memory alloys with a directly measured ΔTad larger than 35 K under tension were achieved. The large ΔTad  and ΔWu can be ascribed to the grain refinement and the heterogeneous internal stress fields after the thermo-mechanical treatment, which have enhanced the critical stress of superelasticity and recoverability of martensitic transformation during unloading.

Suggested Citation

Lei, Ding and Zhou, Yumei and Xu, Yangyang and Dang, Pengfei and Ding, Xiangdong and Sun, Jun and Lookman, Turab and Xue, Dezhen, Learning from Superelasticity Data to Search for Ti-Ni Alloys with Large Elastocaloric Effect. Available at SSRN: https://ssrn.com/abstract=3844696 or http://dx.doi.org/10.2139/ssrn.3844696

Ding Lei

Xi'an Jiaotong University (XJTU) - State Key Laboratory for Mechanical Behavior of Materials ( email )

26 Xianning W Rd.
Xi'an Jiao Tong University
Xi'an, Shaanxi 710049
China

Yumei Zhou

Xi'an Jiaotong University (XJTU) - State Key Laboratory for Mechanical Behavior of Materials ( email )

26 Xianning W Rd.
Xi'an Jiao Tong University
Xi'an, Shaanxi 710049
China

Yangyang Xu

Xi'an Jiaotong University (XJTU) - State Key Laboratory for Mechanical Behavior of Materials

26 Xianning W Rd.
Xi'an Jiao Tong University
Xi'an, Shaanxi 710049
China

Pengfei Dang

Xi'an Jiaotong University (XJTU) - State Key Laboratory for Mechanical Behavior of Materials ( email )

26 Xianning W Rd.
Xi'an Jiao Tong University
Xi'an, Shaanxi 710049
China

Xiangdong Ding

Xi'an Jiaotong University (XJTU) - State Key Laboratory for Mechanical Behavior of Materials ( email )

26 Xianning W Rd.
Xi'an Jiao Tong University
Xi'an, Shaanxi 710049
China

Jun Sun

Xi'an Jiaotong University (XJTU) - State Key Laboratory for Mechanical Behavior of Materials ( email )

26 Xianning W Rd.
Xi'an Jiao Tong University
Xi'an, Shaanxi 710049
China

Turab Lookman

Independent ( email )

Dezhen Xue (Contact Author)

Xi'an Jiaotong University (XJTU) - State Key Laboratory for Mechanical Behavior of Materials ( email )

26 Xianning W Rd.
Xi'an Jiao Tong University
Xi'an, Shaanxi 710049
China

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