Compressive deformation of as-extruded LPSO-containing Mg alloys at different temperatures

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Compressive deformation of as-extruded LPSO-containing Mg alloys at different temperatures. / Zhao, Di; Zhao, Chaoyue; Chen, Xianhua et al.

In: Journal of Materials Research and Technology, Vol. 16, 01.01.2022, p. 944-959.

Research output: Journal contributionsJournal articlesResearchpeer-review

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Zhao D, Zhao C, Chen X, Huang Y, Hort N, Gavras S et al. Compressive deformation of as-extruded LPSO-containing Mg alloys at different temperatures. Journal of Materials Research and Technology. 2022 Jan 1;16:944-959. Epub 2021 Dec 16. doi: 10.1016/j.jmrt.2021.12.053

Bibtex

@article{2f90a84887fd49ab9a490e522125d766,
title = "Compressive deformation of as-extruded LPSO-containing Mg alloys at different temperatures",
abstract = "This work investigates the compressive deformation behavior of as-extruded Mg-6Gd-1.6Y–1Zn-0.4Zr (VZ61) and Mg-6Gd-4.8Y–3Zn-0.4Zr (VZ63) alloys via uniaxial compressive tests at various deformation temperatures. At room temperature, compared with the VZ61 alloy, the compressive yield strength of the VZ63 alloy were obviously enhanced due to its increased amount of LPSO phase. Both alloys exhibited a three-stage strain hardening feature. The strain hardening rate first sharply decreases (stage I), then continues to increase at a slower rate (stage II) and finally decreases (stage III). At stage III, a larger number of dislocation accumulation around the kinked LPSO phase resulted in a higher strain hardening rate for VZ63 alloy than that for VZ61 alloy. During high temperature compression, the true stress–strain curves showed that the flow stress gradually reduced with increasing temperature and also the reducing of strain rate, and the VZ63 alloy displayed a higher peak stress than VZ61 alloy. Constitutive equations were constructed based on the true stress–strain to better understand the relation among flow tress (σ), strain rate (ε⋅) and deformation temperature (T) in VZ alloys during hot deformation. The results showed that the VZ63 alloy had a lower deformation activation energy (Q = 255.6 kJ/mol) than VZ61 alloy (Q = 395.5 kJ/mol). The DRX kinetic models of the VZ61 and VZ63 alloys were also established, indicating that the VZ63 alloy was more prone to DRX with a higher volume fraction of dynamically recrystallized grains (XDRX) at the same deformation conditions.",
keywords = "Constitutive equation, DRX Kinetic model, Dynamic recrystallization, Hot deformation, LPSO phase, Strain hardening, Engineering",
author = "Di Zhao and Chaoyue Zhao and Xianhua Chen and Yuanding Huang and Norbert Hort and Sarkis Gavras and Fusheng Pan",
note = "The authors thank the National Natural Science Foundation of China (No. 52171103 ), and Fundamental Research Funds for the Central Universities (No. 2020CDJDPT001 ) for the financial supports. The China Scholarship Council is also gratefully acknowledged for financial support for Di Zhao ( 202006050158 ).",
year = "2022",
month = jan,
day = "1",
doi = "10.1016/j.jmrt.2021.12.053",
language = "English",
volume = "16",
pages = "944--959",
journal = "Journal of Materials Research and Technology",
issn = "2238-7854",
publisher = "Elsevier B.V.",

}

RIS

TY - JOUR

T1 - Compressive deformation of as-extruded LPSO-containing Mg alloys at different temperatures

AU - Zhao, Di

AU - Zhao, Chaoyue

AU - Chen, Xianhua

AU - Huang, Yuanding

AU - Hort, Norbert

AU - Gavras, Sarkis

AU - Pan, Fusheng

N1 - The authors thank the National Natural Science Foundation of China (No. 52171103 ), and Fundamental Research Funds for the Central Universities (No. 2020CDJDPT001 ) for the financial supports. The China Scholarship Council is also gratefully acknowledged for financial support for Di Zhao ( 202006050158 ).

PY - 2022/1/1

Y1 - 2022/1/1

N2 - This work investigates the compressive deformation behavior of as-extruded Mg-6Gd-1.6Y–1Zn-0.4Zr (VZ61) and Mg-6Gd-4.8Y–3Zn-0.4Zr (VZ63) alloys via uniaxial compressive tests at various deformation temperatures. At room temperature, compared with the VZ61 alloy, the compressive yield strength of the VZ63 alloy were obviously enhanced due to its increased amount of LPSO phase. Both alloys exhibited a three-stage strain hardening feature. The strain hardening rate first sharply decreases (stage I), then continues to increase at a slower rate (stage II) and finally decreases (stage III). At stage III, a larger number of dislocation accumulation around the kinked LPSO phase resulted in a higher strain hardening rate for VZ63 alloy than that for VZ61 alloy. During high temperature compression, the true stress–strain curves showed that the flow stress gradually reduced with increasing temperature and also the reducing of strain rate, and the VZ63 alloy displayed a higher peak stress than VZ61 alloy. Constitutive equations were constructed based on the true stress–strain to better understand the relation among flow tress (σ), strain rate (ε⋅) and deformation temperature (T) in VZ alloys during hot deformation. The results showed that the VZ63 alloy had a lower deformation activation energy (Q = 255.6 kJ/mol) than VZ61 alloy (Q = 395.5 kJ/mol). The DRX kinetic models of the VZ61 and VZ63 alloys were also established, indicating that the VZ63 alloy was more prone to DRX with a higher volume fraction of dynamically recrystallized grains (XDRX) at the same deformation conditions.

AB - This work investigates the compressive deformation behavior of as-extruded Mg-6Gd-1.6Y–1Zn-0.4Zr (VZ61) and Mg-6Gd-4.8Y–3Zn-0.4Zr (VZ63) alloys via uniaxial compressive tests at various deformation temperatures. At room temperature, compared with the VZ61 alloy, the compressive yield strength of the VZ63 alloy were obviously enhanced due to its increased amount of LPSO phase. Both alloys exhibited a three-stage strain hardening feature. The strain hardening rate first sharply decreases (stage I), then continues to increase at a slower rate (stage II) and finally decreases (stage III). At stage III, a larger number of dislocation accumulation around the kinked LPSO phase resulted in a higher strain hardening rate for VZ63 alloy than that for VZ61 alloy. During high temperature compression, the true stress–strain curves showed that the flow stress gradually reduced with increasing temperature and also the reducing of strain rate, and the VZ63 alloy displayed a higher peak stress than VZ61 alloy. Constitutive equations were constructed based on the true stress–strain to better understand the relation among flow tress (σ), strain rate (ε⋅) and deformation temperature (T) in VZ alloys during hot deformation. The results showed that the VZ63 alloy had a lower deformation activation energy (Q = 255.6 kJ/mol) than VZ61 alloy (Q = 395.5 kJ/mol). The DRX kinetic models of the VZ61 and VZ63 alloys were also established, indicating that the VZ63 alloy was more prone to DRX with a higher volume fraction of dynamically recrystallized grains (XDRX) at the same deformation conditions.

KW - Constitutive equation

KW - DRX Kinetic model

KW - Dynamic recrystallization

KW - Hot deformation

KW - LPSO phase

KW - Strain hardening

KW - Engineering

UR - http://www.scopus.com/inward/record.url?scp=85121813506&partnerID=8YFLogxK

U2 - 10.1016/j.jmrt.2021.12.053

DO - 10.1016/j.jmrt.2021.12.053

M3 - Journal articles

AN - SCOPUS:85121813506

VL - 16

SP - 944

EP - 959

JO - Journal of Materials Research and Technology

JF - Journal of Materials Research and Technology

SN - 2238-7854

ER -

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