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Enhanced Magnetostrain in a <0 0 1>(A)-Textured Ni(44.5)Co(4.9)Mn(37.5)In(13.1) Alloy through Superelastic Training

Large magnetostrain can be demonstrated in Ni-Mn-X (X = In, Sn, Sb) meta-magnetic shape memory alloys by resuming the predeformed martensite through magnetic-field-induced reverse martensitic transformation. However, owing to the constraint from the self-accommodated microstructure and randomly dist...

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Detalles Bibliográficos
Autores principales: Guo, Lanyu, Li, Zongbin, Chen, Jiaxing, Yang, Bo, Yan, Haile, Zhao, Xiang, Esling, Claude, Zuo, Liang
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8953679/
https://www.ncbi.nlm.nih.gov/pubmed/35329524
http://dx.doi.org/10.3390/ma15062072
Descripción
Sumario:Large magnetostrain can be demonstrated in Ni-Mn-X (X = In, Sn, Sb) meta-magnetic shape memory alloys by resuming the predeformed martensite through magnetic-field-induced reverse martensitic transformation. However, owing to the constraint from the self-accommodated microstructure and randomly distributed crystallographic orientation, spontaneous magnetostrain without predeformation in polycrystalline alloys remains low. Here, by combining microstructure texturing and superelastic training, enhanced spontaneous magnetostrain was achieved in a directionally solidified Ni(44.5)Co(4.9)Mn(37.5)In(13.1) alloy with strong <0 0 1>(A) preferred orientation. After superelastic training through cyclic compressive loading/unloading on the directionally solidified alloy, a large spontaneous magnetostrain of ~0.65% was obtained by applying a magnetic field of 5 T, showing great improvement when compared to that of the untrained situation, i.e., ~0.45%. Such enhanced magnetoresponse is attributed to the internal stress generated through superelastic training, which affects the variant distribution and the resultant output strain in association with the martensitic transformation.