Hot extrusion approach to enhance the cyclic stability of elastocaloric effect in polycrystalline Ni-Mn-Ga alloys

Longsha Wei; Xuexi Zhang; Weimin Gan; Chao Ding; Lin Geng

doi:10.1016/j.scriptamat.2019.04.009

Hot extrusion approach to enhance the cyclic stability of elastocaloric effect in polycrystalline Ni-Mn-Ga alloys

Longsha Wei
, Xuexi Zhang^*
, Weimin Gan
, Chao Ding
, Lin Geng

^*Corresponding author for this work

Harbin Institute of Technology
Helmholtz-Zentrum Hereon

Research output: Contribution to journal › Article › peer-review

46 Scopus citations

Abstract

Cyclic stability is vital for the application of the elastocaloric effect. We demonstrated here the enhanced cyclic stability in a Ni _50.4 Mn _27.3 Ga _22.3 alloy via hot extrusion. The fine equiaxed grains with 〈111〉 _A texture were obtained after hot extrusion at 1323 K. The extruded alloy showed >250 stable elastocaloric cycles without degradation. The mechanism for the enhanced cyclic stability was the presence of fine grains and low energy dissipation related to the 〈111〉 _A texture. So, hot extrusion may provide a feasible strategy for improving the eCE stability in polycrystalline ferromagnetic shape memory alloys.

Original language	English
Pages (from-to)	28-32
Number of pages	5
Journal	Scripta Materialia
Volume	168
DOIs	https://doi.org/10.1016/j.scriptamat.2019.04.009
State	Published - 15 Jul 2019
Externally published	Yes

Keywords

Cyclic stability
Elastocaloric effect (eCE)
Ferromagnetic shape memory alloys (FMSMAs)
Hot extrusion
Texture

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10.1016/j.scriptamat.2019.04.009

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title = "Hot extrusion approach to enhance the cyclic stability of elastocaloric effect in polycrystalline Ni-Mn-Ga alloys",

abstract = " Cyclic stability is vital for the application of the elastocaloric effect. We demonstrated here the enhanced cyclic stability in a Ni 50.4 Mn 27.3 Ga 22.3 alloy via hot extrusion. The fine equiaxed grains with 〈111〉 A texture were obtained after hot extrusion at 1323 K. The extruded alloy showed >250 stable elastocaloric cycles without degradation. The mechanism for the enhanced cyclic stability was the presence of fine grains and low energy dissipation related to the 〈111〉 A texture. So, hot extrusion may provide a feasible strategy for improving the eCE stability in polycrystalline ferromagnetic shape memory alloys.",

keywords = "Cyclic stability, Elastocaloric effect (eCE), Ferromagnetic shape memory alloys (FMSMAs), Hot extrusion, Texture",

author = "Longsha Wei and Xuexi Zhang and Weimin Gan and Chao Ding and Lin Geng",

note = "Publisher Copyright: {\textcopyright} 2019 Elsevier Ltd",

year = "2019",

month = jul,

day = "15",

doi = "10.1016/j.scriptamat.2019.04.009",

language = "英语",

volume = "168",

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}

TY - JOUR

T1 - Hot extrusion approach to enhance the cyclic stability of elastocaloric effect in polycrystalline Ni-Mn-Ga alloys

AU - Wei, Longsha

AU - Zhang, Xuexi

AU - Gan, Weimin

AU - Ding, Chao

AU - Geng, Lin

PY - 2019/7/15

Y1 - 2019/7/15

N2 - Cyclic stability is vital for the application of the elastocaloric effect. We demonstrated here the enhanced cyclic stability in a Ni 50.4 Mn 27.3 Ga 22.3 alloy via hot extrusion. The fine equiaxed grains with 〈111〉 A texture were obtained after hot extrusion at 1323 K. The extruded alloy showed >250 stable elastocaloric cycles without degradation. The mechanism for the enhanced cyclic stability was the presence of fine grains and low energy dissipation related to the 〈111〉 A texture. So, hot extrusion may provide a feasible strategy for improving the eCE stability in polycrystalline ferromagnetic shape memory alloys.

AB - Cyclic stability is vital for the application of the elastocaloric effect. We demonstrated here the enhanced cyclic stability in a Ni 50.4 Mn 27.3 Ga 22.3 alloy via hot extrusion. The fine equiaxed grains with 〈111〉 A texture were obtained after hot extrusion at 1323 K. The extruded alloy showed >250 stable elastocaloric cycles without degradation. The mechanism for the enhanced cyclic stability was the presence of fine grains and low energy dissipation related to the 〈111〉 A texture. So, hot extrusion may provide a feasible strategy for improving the eCE stability in polycrystalline ferromagnetic shape memory alloys.

KW - Cyclic stability

KW - Elastocaloric effect (eCE)

KW - Ferromagnetic shape memory alloys (FMSMAs)

KW - Hot extrusion

KW - Texture

UR - https://www.scopus.com/pages/publications/85064320232

U2 - 10.1016/j.scriptamat.2019.04.009

DO - 10.1016/j.scriptamat.2019.04.009

M3 - 文章

AN - SCOPUS:85064320232

SN - 1359-6462

VL - 168

SP - 28

EP - 32

JO - Scripta Materialia

JF - Scripta Materialia

ER -

Hot extrusion approach to enhance the cyclic stability of elastocaloric effect in polycrystalline Ni-Mn-Ga alloys

Abstract

Keywords

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