Coherency of ordered γ′ precipitates and thermoelastic martensitic transformation in FeNiCoAlTaB alloys

Yonghong Geng; Doyup Lee; Xiao Xu; Makoto Nagasako; Mingjiang Jin; Xuejun Jin; Toshihiro Omori; Ryosuke Kainuma

doi:10.1016/j.jallcom.2014.12.172

Coherency of ordered γ′ precipitates and thermoelastic martensitic transformation in FeNiCoAlTaB alloys

Yonghong Geng, Doyup Lee, Xiao Xu, Makoto Nagasako, Mingjiang Jin, Xuejun Jin, Toshihiro Omori, Ryosuke Kainuma

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

33 Citations (Scopus)

Abstract

The martensitic transformation characteristics and coherency of ordered γ′ precipitates are investigated by electrical resistivity tests and HAADF-STEM observation in the aged FeNiCoAlTaB alloys. The results reveal that the precipitate grows up in the Ostwald ripening mode at the initial aging stage. As aging time increasing, the coarsening behavior of precipitates deviates from the Ostwald ripening and the martensitic transformation changes from the thermoelastic type to the non-thermoelastic one. The thermoelastic to non-thermoelastic transition with increasing precipitates size results from coherency loss between precipitates and matrix during martensitic transformation.

Original language	English
Pages (from-to)	287-292
Number of pages	6
Journal	Journal of Alloys and Compounds
Volume	628
DOIs	https://doi.org/10.1016/j.jallcom.2014.12.172
Publication status	Published - 2015 Apr 15

Keywords

Coherency
Phase transition
Precipitation
Shape memory
Thermoelastic martensitic transformation

ASJC Scopus subject areas

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

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10.1016/j.jallcom.2014.12.172

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title = "Coherency of ordered γ′ precipitates and thermoelastic martensitic transformation in FeNiCoAlTaB alloys",

abstract = "The martensitic transformation characteristics and coherency of ordered γ′ precipitates are investigated by electrical resistivity tests and HAADF-STEM observation in the aged FeNiCoAlTaB alloys. The results reveal that the precipitate grows up in the Ostwald ripening mode at the initial aging stage. As aging time increasing, the coarsening behavior of precipitates deviates from the Ostwald ripening and the martensitic transformation changes from the thermoelastic type to the non-thermoelastic one. The thermoelastic to non-thermoelastic transition with increasing precipitates size results from coherency loss between precipitates and matrix during martensitic transformation.",

keywords = "Coherency, Phase transition, Precipitation, Shape memory, Thermoelastic martensitic transformation",

author = "Yonghong Geng and Doyup Lee and Xiao Xu and Makoto Nagasako and Mingjiang Jin and Xuejun Jin and Toshihiro Omori and Ryosuke Kainuma",

note = "Funding Information: This work was supported by the Fostering Global Human Resource Program (FGHR) between Tohoku University and Shanghai Jiao Tong University, the National Natural Science Foundation of China (No. 51201100 ) and the National Basic Research Program of China (973 Programs Grant No. 2012CB619400 ). Publisher Copyright: {\textcopyright} 2014 Elsevier B.V. All rights reserved.",

year = "2015",

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day = "15",

doi = "10.1016/j.jallcom.2014.12.172",

language = "English",

volume = "628",

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journal = "Journal of Alloys and Compounds",

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T1 - Coherency of ordered γ′ precipitates and thermoelastic martensitic transformation in FeNiCoAlTaB alloys

AU - Geng, Yonghong

AU - Lee, Doyup

AU - Xu, Xiao

AU - Nagasako, Makoto

AU - Jin, Mingjiang

AU - Jin, Xuejun

AU - Omori, Toshihiro

AU - Kainuma, Ryosuke

N1 - Funding Information: This work was supported by the Fostering Global Human Resource Program (FGHR) between Tohoku University and Shanghai Jiao Tong University, the National Natural Science Foundation of China (No. 51201100 ) and the National Basic Research Program of China (973 Programs Grant No. 2012CB619400 ). Publisher Copyright: © 2014 Elsevier B.V. All rights reserved.

PY - 2015/4/15

Y1 - 2015/4/15

N2 - The martensitic transformation characteristics and coherency of ordered γ′ precipitates are investigated by electrical resistivity tests and HAADF-STEM observation in the aged FeNiCoAlTaB alloys. The results reveal that the precipitate grows up in the Ostwald ripening mode at the initial aging stage. As aging time increasing, the coarsening behavior of precipitates deviates from the Ostwald ripening and the martensitic transformation changes from the thermoelastic type to the non-thermoelastic one. The thermoelastic to non-thermoelastic transition with increasing precipitates size results from coherency loss between precipitates and matrix during martensitic transformation.

AB - The martensitic transformation characteristics and coherency of ordered γ′ precipitates are investigated by electrical resistivity tests and HAADF-STEM observation in the aged FeNiCoAlTaB alloys. The results reveal that the precipitate grows up in the Ostwald ripening mode at the initial aging stage. As aging time increasing, the coarsening behavior of precipitates deviates from the Ostwald ripening and the martensitic transformation changes from the thermoelastic type to the non-thermoelastic one. The thermoelastic to non-thermoelastic transition with increasing precipitates size results from coherency loss between precipitates and matrix during martensitic transformation.

KW - Coherency

KW - Phase transition

KW - Precipitation

KW - Shape memory

KW - Thermoelastic martensitic transformation

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DO - 10.1016/j.jallcom.2014.12.172

M3 - Letter

AN - SCOPUS:84920860988

SN - 0925-8388

VL - 628

SP - 287

EP - 292

JO - Journal of Alloys and Compounds

JF - Journal of Alloys and Compounds

ER -

Coherency of ordered γ′ precipitates and thermoelastic martensitic transformation in FeNiCoAlTaB alloys

Abstract

Keywords

ASJC Scopus subject areas

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