Abnormal strain evolution of austenite upon martensitic transformation in FeNiCo alloy with invar effect : An in situ study

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

Overview

3 Scopus Citations

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Author(s)

Xiangxiang Rao
Yadong Ru
Fangmin Guo
Lishan Cui
Kaiyuan Yu

Related Research Unit(s)

Detail(s)

Original language	English
Article number	114942
Journal / Publication	Scripta Materialia
Volume	220
Online published	25 Jul 2022
Publication status	Published - Nov 2022

Link(s)

DOI	DOI https://doi.org/10.1016/j.scriptamat.2022.114942 Final Published version
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Link to Scopus	https://www.scopus.com/record/display.uri?eid=2-s2.0-85134829964&origin=recordpage
Permanent Link	https://scholars.cityu.edu.hk/en/publications/publication(8115bf87-c2b8-4956-be25-c7095580f8bb).html

Abstract

The lattice strain evolution is essential for the understanding of the invar effect. In this letter, the transformation behavior and lattice strain of austenite in a Fe₆₆Ni₂₉Co₅ alloy is studied by in situ synchrotron X-ray diffraction during cooling. An abnormal increase of the lattice strain is observed upon martensitic transformation. The strain inhomogeneity is found to increase monotonically before transformation during cooling. The anomalies are suggested to be related to the restricted nature of the transformation, which is further evidenced by the abnormal lattice strain evolution in a laminated Cu/steel nanocomposite.

Research Area(s)

Internal stress, Invar alloy, Lattice strain, Martensitic transformation

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Publication fingerprints text

phase transformatio... INIS

Alloy Material Science

Austenite Material Science

Invar Material Science

Martensitic Transfo... Keyphrases

In Situ Study Keyphrases

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Citation Format(s)

[ RIS ] [ BibTeX ]

Abnormal strain evolution of austenite upon martensitic transformation in FeNiCo alloy with invar effect: An in situ study. / Rao, Xiangxiang; Ru, Yadong; Guo, Fangmin et al.
In: Scripta Materialia, Vol. 220, 114942, 11.2022.

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

Rao, X, Ru, Y, Guo, F, Ren, Y, Cui, L & Yu, K 2022, 'Abnormal strain evolution of austenite upon martensitic transformation in FeNiCo alloy with invar effect: An in situ study', Scripta Materialia, vol. 220, 114942. https://doi.org/10.1016/j.scriptamat.2022.114942

Rao, X., Ru, Y., Guo, F., Ren, Y., Cui, L., & Yu, K. (2022). Abnormal strain evolution of austenite upon martensitic transformation in FeNiCo alloy with invar effect: An in situ study. Scripta Materialia, 220, Article 114942. https://doi.org/10.1016/j.scriptamat.2022.114942

Rao X, Ru Y, Guo F, Ren Y, Cui L, Yu K. Abnormal strain evolution of austenite upon martensitic transformation in FeNiCo alloy with invar effect: An in situ study. Scripta Materialia. 2022 Nov;220:114942. Epub 2022 Jul 25. doi: 10.1016/j.scriptamat.2022.114942

Rao, Xiangxiang ; Ru, Yadong ; Guo, Fangmin et al. / Abnormal strain evolution of austenite upon martensitic transformation in FeNiCo alloy with invar effect : An in situ study. In: Scripta Materialia. 2022 ; Vol. 220.