Precipitation Behavior of σ-FeCr Phases in Hastelloy C-2000 Superalloy Under Plastic Deformation and Aging Treatment

Liang Yuan; Rui Hu; Tiebang Zhang; Yinben Han; Xiangyi Xue; Jinshan Li

doi:10.1007/s11665-014-1351-7

Precipitation Behavior of σ-FeCr Phases in Hastelloy C-2000 Superalloy Under Plastic Deformation and Aging Treatment

Liang Yuan, Rui Hu, Tiebang Zhang, Yinben Han, Xiangyi Xue, Jinshan Li

School of Materials Sience and Engineering

Northwestern Polytechnical University Xian

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

4 Scopus citations

Abstract

Precipitation behavior and structural feature of the σ-FeCr phase in Hastelloy C-2000 alloy under plastic deformation and aging treatment are investigated using scanning electron microscopy, transmission electron microscope, and x-ray diffraction. The plate-shaped σ-FeCr phase can precipitate in the alloy by plastic deformation and aging treatment because of the increase of both defect density and heterogeneity of alloying elements. This phase is distributed along the interface between matrix and deformation twins. The appearance of unidirectional faults on surface of the σ-FeCr phase indicates that it may be a metastable-phase. Because of the precipitation of the brittle σ-FeCr phase and the increase of defects’ density such as dislocation and deformation twins in the matrix, mechanical properties of the alloy are improved remarkably.

Original language	English
Pages (from-to)	565-571
Number of pages	7
Journal	Journal of Materials Engineering and Performance
Volume	24
Issue number	2
DOIs	https://doi.org/10.1007/s11665-014-1351-7
State	Published - Feb 2015

Keywords

mechanical properties
plastic deformation
unidirectional faults
σ-FeCr phase

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10.1007/s11665-014-1351-7

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title = "Precipitation Behavior of σ-FeCr Phases in Hastelloy C-2000 Superalloy Under Plastic Deformation and Aging Treatment",

abstract = "Precipitation behavior and structural feature of the σ-FeCr phase in Hastelloy C-2000 alloy under plastic deformation and aging treatment are investigated using scanning electron microscopy, transmission electron microscope, and x-ray diffraction. The plate-shaped σ-FeCr phase can precipitate in the alloy by plastic deformation and aging treatment because of the increase of both defect density and heterogeneity of alloying elements. This phase is distributed along the interface between matrix and deformation twins. The appearance of unidirectional faults on surface of the σ-FeCr phase indicates that it may be a metastable-phase. Because of the precipitation of the brittle σ-FeCr phase and the increase of defects{\textquoteright} density such as dislocation and deformation twins in the matrix, mechanical properties of the alloy are improved remarkably.",

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author = "Liang Yuan and Rui Hu and Tiebang Zhang and Yinben Han and Xiangyi Xue and Jinshan Li",

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doi = "10.1007/s11665-014-1351-7",

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T1 - Precipitation Behavior of σ-FeCr Phases in Hastelloy C-2000 Superalloy Under Plastic Deformation and Aging Treatment

AU - Yuan, Liang

AU - Hu, Rui

AU - Zhang, Tiebang

AU - Han, Yinben

AU - Xue, Xiangyi

AU - Li, Jinshan

PY - 2015/2

Y1 - 2015/2

N2 - Precipitation behavior and structural feature of the σ-FeCr phase in Hastelloy C-2000 alloy under plastic deformation and aging treatment are investigated using scanning electron microscopy, transmission electron microscope, and x-ray diffraction. The plate-shaped σ-FeCr phase can precipitate in the alloy by plastic deformation and aging treatment because of the increase of both defect density and heterogeneity of alloying elements. This phase is distributed along the interface between matrix and deformation twins. The appearance of unidirectional faults on surface of the σ-FeCr phase indicates that it may be a metastable-phase. Because of the precipitation of the brittle σ-FeCr phase and the increase of defects’ density such as dislocation and deformation twins in the matrix, mechanical properties of the alloy are improved remarkably.

AB - Precipitation behavior and structural feature of the σ-FeCr phase in Hastelloy C-2000 alloy under plastic deformation and aging treatment are investigated using scanning electron microscopy, transmission electron microscope, and x-ray diffraction. The plate-shaped σ-FeCr phase can precipitate in the alloy by plastic deformation and aging treatment because of the increase of both defect density and heterogeneity of alloying elements. This phase is distributed along the interface between matrix and deformation twins. The appearance of unidirectional faults on surface of the σ-FeCr phase indicates that it may be a metastable-phase. Because of the precipitation of the brittle σ-FeCr phase and the increase of defects’ density such as dislocation and deformation twins in the matrix, mechanical properties of the alloy are improved remarkably.

KW - mechanical properties

KW - plastic deformation

KW - unidirectional faults

KW - σ-FeCr phase

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Precipitation Behavior of σ-FeCr Phases in Hastelloy C-2000 Superalloy Under Plastic Deformation and Aging Treatment

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