Stress-Induced Variant Selection of γ″ Phase in Inconel 718 During Service: Mechanism and Effects on Mechanical Behavior

Hailong Qin; Zhongnan Bi; Ruiyao Zhang; Tung Lik Lee; Hongyao Yu; Hai Chi; Dongfeng Li; Hongbiao Dong; Jinhui Du; Ji Zhang

doi:10.1007/978-3-030-51834-9_69

Stress-Induced Variant Selection of γ″ Phase in Inconel 718 During Service: Mechanism and Effects on Mechanical Behavior

Hailong Qin^*
, Zhongnan Bi
, Ruiyao Zhang
, Tung Lik Lee
, Hongyao Yu
, Hai Chi
, Dongfeng Li
, Hongbiao Dong
, Jinhui Du
, Ji Zhang

^*Corresponding author for this work

China Iron and Steel Research Institute Group
University of Leicester
ISIS Neutron and Muon Source
Harbin Institute of Technology

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

6 Scopus citations

Abstract

The stress-induced variant selection (SIVS) of γ″ phase caused by thermo-mechanical coupling condition is studied systematically. The SIVS index f is devised and utilized to quantify the degree of SIVS via SEM image post-processing within <001> oriented grains. Applied stress condition does not affect the volume fraction, average size, and crystallographic orientation of the γ″ but changes the proportion of the three variants. The SIVS behavior of γ″ phase is dependent upon the applied stress direction and grain orientation. By considering the variation of the SIVS index with thermal aging and creep parameters, a causal relationship between degree of SIVS with temperature, stress, and time is elucidated. The yield strength and tensile strength at 650 °C decrease with the increase of SIVS degree. Contour map for the degree of SIVS is presented to evaluate the service temperature and stress of an Inconel 718 component. The formation mechanism of SIVS of γ” is proposed: the orienting effect of stress condition is appreciable only during Ostwald ripening, due to the change of the γ″/γ lattice mismatch.

Original language	English
Title of host publication	Superalloys 2020 - Proceedings of the 14th International Symposium on Superalloys
Editors	Sammy Tin, Mark Hardy, Justin Clews, Jonathan Cormier, Qiang Feng, John Marcin, Chris O'Brien, Akane Suzuki
Publisher	Springer Science and Business Media Deutschland GmbH
Pages	713-725
Number of pages	13
ISBN (Print)	9783030518332
DOIs	https://doi.org/10.1007/978-3-030-51834-9_69
State	Published - 2020
Externally published	Yes
Event	14th International Symposium on Superalloys, Superalloys 2021 - Seven Springs, United States Duration: 12 Sep 2021 → 16 Sep 2021

Publication series

Name	Minerals, Metals and Materials Series
ISSN (Print)	2367-1181
ISSN (Electronic)	2367-1696

Conference

Conference	14th International Symposium on Superalloys, Superalloys 2021
Country/Territory	United States
City	Seven Springs
Period	12/09/21 → 16/09/21

Keywords

Inconel 718
Microstructural degradation
Stress-induced variant selection
Thermo-mechanical coupling

Access to Document

10.1007/978-3-030-51834-9_69

Cite this

Qin, H., Bi, Z., Zhang, R., Lee, T. L., Yu, H., Chi, H., Li, D., Dong, H., Du, J., & Zhang, J. (2020). Stress-Induced Variant Selection of γ″ Phase in Inconel 718 During Service: Mechanism and Effects on Mechanical Behavior. In S. Tin, M. Hardy, J. Clews, J. Cormier, Q. Feng, J. Marcin, C. O'Brien, & A. Suzuki (Eds.), Superalloys 2020 - Proceedings of the 14th International Symposium on Superalloys (pp. 713-725). (Minerals, Metals and Materials Series). Springer Science and Business Media Deutschland GmbH. https://doi.org/10.1007/978-3-030-51834-9_69

Qin, Hailong ; Bi, Zhongnan ; Zhang, Ruiyao et al. / Stress-Induced Variant Selection of γ″ Phase in Inconel 718 During Service : Mechanism and Effects on Mechanical Behavior. Superalloys 2020 - Proceedings of the 14th International Symposium on Superalloys. editor / Sammy Tin ; Mark Hardy ; Justin Clews ; Jonathan Cormier ; Qiang Feng ; John Marcin ; Chris O'Brien ; Akane Suzuki. Springer Science and Business Media Deutschland GmbH, 2020. pp. 713-725 (Minerals, Metals and Materials Series).

@inproceedings{514e53e23db047af8bafee7e780582aa,

title = "Stress-Induced Variant Selection of γ″ Phase in Inconel 718 During Service: Mechanism and Effects on Mechanical Behavior",

abstract = "The stress-induced variant selection (SIVS) of γ″ phase caused by thermo-mechanical coupling condition is studied systematically. The SIVS index f is devised and utilized to quantify the degree of SIVS via SEM image post-processing within <001> oriented grains. Applied stress condition does not affect the volume fraction, average size, and crystallographic orientation of the γ″ but changes the proportion of the three variants. The SIVS behavior of γ″ phase is dependent upon the applied stress direction and grain orientation. By considering the variation of the SIVS index with thermal aging and creep parameters, a causal relationship between degree of SIVS with temperature, stress, and time is elucidated. The yield strength and tensile strength at 650 °C decrease with the increase of SIVS degree. Contour map for the degree of SIVS is presented to evaluate the service temperature and stress of an Inconel 718 component. The formation mechanism of SIVS of γ” is proposed: the orienting effect of stress condition is appreciable only during Ostwald ripening, due to the change of the γ″/γ lattice mismatch.",

keywords = "Inconel 718, Microstructural degradation, Stress-induced variant selection, Thermo-mechanical coupling",

author = "Hailong Qin and Zhongnan Bi and Ruiyao Zhang and Lee, \{Tung Lik\} and Hongyao Yu and Hai Chi and Dongfeng Li and Hongbiao Dong and Jinhui Du and Ji Zhang",

note = "Publisher Copyright: {\textcopyright} 2020, The Minerals, Metals \& Materials Society.; 14th International Symposium on Superalloys, Superalloys 2021 ; Conference date: 12-09-2021 Through 16-09-2021",

year = "2020",

doi = "10.1007/978-3-030-51834-9\_69",

language = "英语",

isbn = "9783030518332",

series = "Minerals, Metals and Materials Series",

publisher = "Springer Science and Business Media Deutschland GmbH",

pages = "713--725",

editor = "Sammy Tin and Mark Hardy and Justin Clews and Jonathan Cormier and Qiang Feng and John Marcin and Chris O'Brien and Akane Suzuki",

booktitle = "Superalloys 2020 - Proceedings of the 14th International Symposium on Superalloys",

address = "德国",

}

Qin, H, Bi, Z, Zhang, R, Lee, TL, Yu, H, Chi, H, Li, D, Dong, H, Du, J & Zhang, J 2020, Stress-Induced Variant Selection of γ″ Phase in Inconel 718 During Service: Mechanism and Effects on Mechanical Behavior. in S Tin, M Hardy, J Clews, J Cormier, Q Feng, J Marcin, C O'Brien & A Suzuki (eds), Superalloys 2020 - Proceedings of the 14th International Symposium on Superalloys. Minerals, Metals and Materials Series, Springer Science and Business Media Deutschland GmbH, pp. 713-725, 14th International Symposium on Superalloys, Superalloys 2021, Seven Springs, United States, 12/09/21. https://doi.org/10.1007/978-3-030-51834-9_69

Stress-Induced Variant Selection of γ″ Phase in Inconel 718 During Service: Mechanism and Effects on Mechanical Behavior. / Qin, Hailong; Bi, Zhongnan; Zhang, Ruiyao et al.
Superalloys 2020 - Proceedings of the 14th International Symposium on Superalloys. ed. / Sammy Tin; Mark Hardy; Justin Clews; Jonathan Cormier; Qiang Feng; John Marcin; Chris O'Brien; Akane Suzuki. Springer Science and Business Media Deutschland GmbH, 2020. p. 713-725 (Minerals, Metals and Materials Series).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

TY - GEN

T1 - Stress-Induced Variant Selection of γ″ Phase in Inconel 718 During Service

T2 - 14th International Symposium on Superalloys, Superalloys 2021

AU - Qin, Hailong

AU - Bi, Zhongnan

AU - Zhang, Ruiyao

AU - Lee, Tung Lik

AU - Yu, Hongyao

AU - Chi, Hai

AU - Li, Dongfeng

AU - Dong, Hongbiao

AU - Du, Jinhui

AU - Zhang, Ji

PY - 2020

Y1 - 2020

N2 - The stress-induced variant selection (SIVS) of γ″ phase caused by thermo-mechanical coupling condition is studied systematically. The SIVS index f is devised and utilized to quantify the degree of SIVS via SEM image post-processing within <001> oriented grains. Applied stress condition does not affect the volume fraction, average size, and crystallographic orientation of the γ″ but changes the proportion of the three variants. The SIVS behavior of γ″ phase is dependent upon the applied stress direction and grain orientation. By considering the variation of the SIVS index with thermal aging and creep parameters, a causal relationship between degree of SIVS with temperature, stress, and time is elucidated. The yield strength and tensile strength at 650 °C decrease with the increase of SIVS degree. Contour map for the degree of SIVS is presented to evaluate the service temperature and stress of an Inconel 718 component. The formation mechanism of SIVS of γ” is proposed: the orienting effect of stress condition is appreciable only during Ostwald ripening, due to the change of the γ″/γ lattice mismatch.

AB - The stress-induced variant selection (SIVS) of γ″ phase caused by thermo-mechanical coupling condition is studied systematically. The SIVS index f is devised and utilized to quantify the degree of SIVS via SEM image post-processing within <001> oriented grains. Applied stress condition does not affect the volume fraction, average size, and crystallographic orientation of the γ″ but changes the proportion of the three variants. The SIVS behavior of γ″ phase is dependent upon the applied stress direction and grain orientation. By considering the variation of the SIVS index with thermal aging and creep parameters, a causal relationship between degree of SIVS with temperature, stress, and time is elucidated. The yield strength and tensile strength at 650 °C decrease with the increase of SIVS degree. Contour map for the degree of SIVS is presented to evaluate the service temperature and stress of an Inconel 718 component. The formation mechanism of SIVS of γ” is proposed: the orienting effect of stress condition is appreciable only during Ostwald ripening, due to the change of the γ″/γ lattice mismatch.

KW - Inconel 718

KW - Microstructural degradation

KW - Stress-induced variant selection

KW - Thermo-mechanical coupling

UR - https://www.scopus.com/pages/publications/85091279573

U2 - 10.1007/978-3-030-51834-9_69

DO - 10.1007/978-3-030-51834-9_69

M3 - 会议稿件

AN - SCOPUS:85091279573

SN - 9783030518332

T3 - Minerals, Metals and Materials Series

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EP - 725

BT - Superalloys 2020 - Proceedings of the 14th International Symposium on Superalloys

A2 - Tin, Sammy

A2 - Hardy, Mark

A2 - Clews, Justin

A2 - Cormier, Jonathan

A2 - Feng, Qiang

A2 - Marcin, John

A2 - O'Brien, Chris

A2 - Suzuki, Akane

PB - Springer Science and Business Media Deutschland GmbH

Y2 - 12 September 2021 through 16 September 2021

ER -

Qin H, Bi Z, Zhang R, Lee TL, Yu H, Chi H et al. Stress-Induced Variant Selection of γ″ Phase in Inconel 718 During Service: Mechanism and Effects on Mechanical Behavior. In Tin S, Hardy M, Clews J, Cormier J, Feng Q, Marcin J, O'Brien C, Suzuki A, editors, Superalloys 2020 - Proceedings of the 14th International Symposium on Superalloys. Springer Science and Business Media Deutschland GmbH. 2020. p. 713-725. (Minerals, Metals and Materials Series). doi: 10.1007/978-3-030-51834-9_69

Stress-Induced Variant Selection of γ″ Phase in Inconel 718 During Service: Mechanism and Effects on Mechanical Behavior

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Keywords

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