β'' needle-shape precipitate formation in Al-Mg-Si alloy: Phase field simulation and experimental verification

Hong Mao; Yi Kong; Dan Cai; Mingjun Yang; Yingbiao Peng; Yinping Zeng; Geng Zhang; Xiong Shuai; Qi Huang; Kai Li; Helena Zapolsky; Yong Du

doi:10.1016/j.commatsci.2020.109878

β'' needle-shape precipitate formation in Al-Mg-Si alloy: Phase field simulation and experimental verification

Hong Mao, Yi Kong, Dan Cai, Mingjun Yang, Yingbiao Peng, Yinping Zeng, Geng Zhang, Xiong Shuai, Qi Huang, Kai Li, Helena Zapolsky, Yong Du

Physical Sciences and Engineering

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

20 Scopus citations

Abstract

β'' needle-shape precipitate structures significantly affect the mechanical properties of 6xxx aluminum alloys. In this study, a modified multi-phase field (MPF) method combined with the thermodynamic and kinetic databases provided with the CALPHAD (Computer Coupling of Phase Diagrams and Thermochemistry) method has been employed to investigate the morphological evolution of the monoclinic β'' precipitates in Al-Mg-Si alloy. Emphasis has been placed on understanding the influences of interfacial energy anisotropy and elastic interaction on the shape of β'' precipitates. It is shown that the high anisotropic strain alone cannot explain the needle shape of β'' precipitates. In the case of considering the contributions from both anisotropic interfacial energy and elastic interaction simultaneously, the simulations lead to the formation of unique micro-needle-like structures in age strengthening 6xxx Al alloy. The simulation results are compared with plate-shaped θ'(Al2Cu) precipitate in Al-Cu system, and verified with high-resolution transmission electron microscopy (HRTEM) images of needle-like β'' precipitates in Al-Mg-Si system.

Original language	English (US)
Pages (from-to)	109878
Journal	Computational Materials Science
Volume	184
DOIs	https://doi.org/10.1016/j.commatsci.2020.109878
State	Published - Jun 20 2020

Bibliographical note

KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: This study was funded by the National Natural Science Foundation of China (Grant Numbers: 51531009, 51771234) and National Key R&D Program of China (2018YFB0704003). Thanks to Guangxi Natural Science Foundation under Grant No.AD19245052&AD19110008. Hong Mao also thanks the project of the CSU Special Scholarship for Study Abroad to attend the exchange program. The data that support the findings of this study are available from the authors upon reasonable request.

Access to Document

10.1016/j.commatsci.2020.109878

Cite this

@article{113c3d7675e74089a0e0091d8de382ec,

title = "β'' needle-shape precipitate formation in Al-Mg-Si alloy: Phase field simulation and experimental verification",

abstract = "β'' needle-shape precipitate structures significantly affect the mechanical properties of 6xxx aluminum alloys. In this study, a modified multi-phase field (MPF) method combined with the thermodynamic and kinetic databases provided with the CALPHAD (Computer Coupling of Phase Diagrams and Thermochemistry) method has been employed to investigate the morphological evolution of the monoclinic β'' precipitates in Al-Mg-Si alloy. Emphasis has been placed on understanding the influences of interfacial energy anisotropy and elastic interaction on the shape of β'' precipitates. It is shown that the high anisotropic strain alone cannot explain the needle shape of β'' precipitates. In the case of considering the contributions from both anisotropic interfacial energy and elastic interaction simultaneously, the simulations lead to the formation of unique micro-needle-like structures in age strengthening 6xxx Al alloy. The simulation results are compared with plate-shaped θ'(Al2Cu) precipitate in Al-Cu system, and verified with high-resolution transmission electron microscopy (HRTEM) images of needle-like β'' precipitates in Al-Mg-Si system.",

author = "Hong Mao and Yi Kong and Dan Cai and Mingjun Yang and Yingbiao Peng and Yinping Zeng and Geng Zhang and Xiong Shuai and Qi Huang and Kai Li and Helena Zapolsky and Yong Du",

note = "KAUST Repository Item: Exported on 2020-10-01 Acknowledgements: This study was funded by the National Natural Science Foundation of China (Grant Numbers: 51531009, 51771234) and National Key R&D Program of China (2018YFB0704003). Thanks to Guangxi Natural Science Foundation under Grant No.AD19245052&AD19110008. Hong Mao also thanks the project of the CSU Special Scholarship for Study Abroad to attend the exchange program. The data that support the findings of this study are available from the authors upon reasonable request.",

year = "2020",

month = jun,

day = "20",

doi = "10.1016/j.commatsci.2020.109878",

language = "English (US)",

volume = "184",

pages = "109878",

journal = "Computational Materials Science",

issn = "0927-0256",

publisher = "Elsevier",

}

TY - JOUR

T1 - β'' needle-shape precipitate formation in Al-Mg-Si alloy: Phase field simulation and experimental verification

AU - Mao, Hong

AU - Kong, Yi

AU - Cai, Dan

AU - Yang, Mingjun

AU - Peng, Yingbiao

AU - Zeng, Yinping

AU - Zhang, Geng

AU - Shuai, Xiong

AU - Huang, Qi

AU - Li, Kai

AU - Zapolsky, Helena

AU - Du, Yong

N1 - KAUST Repository Item: Exported on 2020-10-01 Acknowledgements: This study was funded by the National Natural Science Foundation of China (Grant Numbers: 51531009, 51771234) and National Key R&D Program of China (2018YFB0704003). Thanks to Guangxi Natural Science Foundation under Grant No.AD19245052&AD19110008. Hong Mao also thanks the project of the CSU Special Scholarship for Study Abroad to attend the exchange program. The data that support the findings of this study are available from the authors upon reasonable request.

PY - 2020/6/20

Y1 - 2020/6/20

N2 - β'' needle-shape precipitate structures significantly affect the mechanical properties of 6xxx aluminum alloys. In this study, a modified multi-phase field (MPF) method combined with the thermodynamic and kinetic databases provided with the CALPHAD (Computer Coupling of Phase Diagrams and Thermochemistry) method has been employed to investigate the morphological evolution of the monoclinic β'' precipitates in Al-Mg-Si alloy. Emphasis has been placed on understanding the influences of interfacial energy anisotropy and elastic interaction on the shape of β'' precipitates. It is shown that the high anisotropic strain alone cannot explain the needle shape of β'' precipitates. In the case of considering the contributions from both anisotropic interfacial energy and elastic interaction simultaneously, the simulations lead to the formation of unique micro-needle-like structures in age strengthening 6xxx Al alloy. The simulation results are compared with plate-shaped θ'(Al2Cu) precipitate in Al-Cu system, and verified with high-resolution transmission electron microscopy (HRTEM) images of needle-like β'' precipitates in Al-Mg-Si system.

AB - β'' needle-shape precipitate structures significantly affect the mechanical properties of 6xxx aluminum alloys. In this study, a modified multi-phase field (MPF) method combined with the thermodynamic and kinetic databases provided with the CALPHAD (Computer Coupling of Phase Diagrams and Thermochemistry) method has been employed to investigate the morphological evolution of the monoclinic β'' precipitates in Al-Mg-Si alloy. Emphasis has been placed on understanding the influences of interfacial energy anisotropy and elastic interaction on the shape of β'' precipitates. It is shown that the high anisotropic strain alone cannot explain the needle shape of β'' precipitates. In the case of considering the contributions from both anisotropic interfacial energy and elastic interaction simultaneously, the simulations lead to the formation of unique micro-needle-like structures in age strengthening 6xxx Al alloy. The simulation results are compared with plate-shaped θ'(Al2Cu) precipitate in Al-Cu system, and verified with high-resolution transmission electron microscopy (HRTEM) images of needle-like β'' precipitates in Al-Mg-Si system.

UR - http://hdl.handle.net/10754/663849

UR - https://linkinghub.elsevier.com/retrieve/pii/S0927025620303694

UR - http://www.scopus.com/inward/record.url?scp=85086628346&partnerID=8YFLogxK

U2 - 10.1016/j.commatsci.2020.109878

DO - 10.1016/j.commatsci.2020.109878

M3 - Article

SN - 0927-0256

VL - 184

SP - 109878

JO - Computational Materials Science

JF - Computational Materials Science

ER -

β'' needle-shape precipitate formation in Al-Mg-Si alloy: Phase field simulation and experimental verification

Abstract

Bibliographical note

Access to Document

Other files and links

Fingerprint

Cite this