The evolution of LPSO phase and its influence on grain size during cooling free forging

In this paper, the deformation behavior of the LPSO phase of Mg-Gd-Y-Zn-Zr and its influence on the grain size are studied during the cooling free forging deformation. Studies have shown that cooling free forging can refine different forms of LPSO phases. The lamellar and block LPSO phases are kinke...

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Main Authors: Guoqiang Wang, Zhongliang Xiao, Zhen Yang, Pengzhan Liu
Format: Article
Language:English
Published: IOP Publishing 2021-01-01
Series:Materials Research Express
Subjects:
Online Access:https://doi.org/10.1088/2053-1591/ac1006
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author Guoqiang Wang
Zhongliang Xiao
Zhen Yang
Pengzhan Liu
author_facet Guoqiang Wang
Zhongliang Xiao
Zhen Yang
Pengzhan Liu
author_sort Guoqiang Wang
collection DOAJ
description In this paper, the deformation behavior of the LPSO phase of Mg-Gd-Y-Zn-Zr and its influence on the grain size are studied during the cooling free forging deformation. Studies have shown that cooling free forging can refine different forms of LPSO phases. The lamellar and block LPSO phases are kinked and broken during the deformation process. The kink angle and the number of kinks of the lamellar phase are greater than that of the block phase. With the increase of the cooling pass, the fragmentation of the lamellar phase is more violent. The kink and broken of the LPSO phase significantly refined the grain size by dividing the grains and promoting dynamic recrystallization. The grain size has dropped significantly from 113 μ m in one pass to 12 μ m in three passes. Uniform fine structure improves alloy mechanical properties through the Hall-Petch principle. The ultimate tensile strength of three-pass alloy reaches 323.2 MPa, the yield strength reaches 239.9 MPa, and the elongation reaches 17.1%.
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spelling doaj.art-4a8140f7f73744138d77159955dbda822023-08-09T15:51:37ZengIOP PublishingMaterials Research Express2053-15912021-01-018707650810.1088/2053-1591/ac1006The evolution of LPSO phase and its influence on grain size during cooling free forgingGuoqiang Wang0Zhongliang Xiao1https://orcid.org/0000-0001-9323-1040Zhen Yang2Pengzhan Liu3College of Mechanical and Electrical Engineering, North University of China , Taiyuan, 030051, People’s Republic of ChinaSchool of Chemical Engineering, Nanjing University of Science and Technology , Nanjing, 210094, People’s Republic of ChinaCollege of Mechanical and Electrical Engineering, North University of China , Taiyuan, 030051, People’s Republic of ChinaCollege of Mechanical and Electrical Engineering, North University of China , Taiyuan, 030051, People’s Republic of ChinaIn this paper, the deformation behavior of the LPSO phase of Mg-Gd-Y-Zn-Zr and its influence on the grain size are studied during the cooling free forging deformation. Studies have shown that cooling free forging can refine different forms of LPSO phases. The lamellar and block LPSO phases are kinked and broken during the deformation process. The kink angle and the number of kinks of the lamellar phase are greater than that of the block phase. With the increase of the cooling pass, the fragmentation of the lamellar phase is more violent. The kink and broken of the LPSO phase significantly refined the grain size by dividing the grains and promoting dynamic recrystallization. The grain size has dropped significantly from 113 μ m in one pass to 12 μ m in three passes. Uniform fine structure improves alloy mechanical properties through the Hall-Petch principle. The ultimate tensile strength of three-pass alloy reaches 323.2 MPa, the yield strength reaches 239.9 MPa, and the elongation reaches 17.1%.https://doi.org/10.1088/2053-1591/ac1006Mg-RELPSO phasekinkmechanical properties
spellingShingle Guoqiang Wang
Zhongliang Xiao
Zhen Yang
Pengzhan Liu
The evolution of LPSO phase and its influence on grain size during cooling free forging
Materials Research Express
Mg-RE
LPSO phase
kink
mechanical properties
title The evolution of LPSO phase and its influence on grain size during cooling free forging
title_full The evolution of LPSO phase and its influence on grain size during cooling free forging
title_fullStr The evolution of LPSO phase and its influence on grain size during cooling free forging
title_full_unstemmed The evolution of LPSO phase and its influence on grain size during cooling free forging
title_short The evolution of LPSO phase and its influence on grain size during cooling free forging
title_sort evolution of lpso phase and its influence on grain size during cooling free forging
topic Mg-RE
LPSO phase
kink
mechanical properties
url https://doi.org/10.1088/2053-1591/ac1006
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