TY - JOUR
T1 - Deformation-induced dissolution of long-period stacking ordered structures and its re-precipitation in a Mg-Gd-Zn-Mn alloy
AU - Su, Ning
AU - Deng, Qingchen
AU - Wu, Yujuan
AU - Peng, Liming
AU - Yang, Kun
AU - Chen, Qiang
N1 - Funding Information:
This work is supported by the National Key Research and Development Program of China (No. 2016YFB0701201 ), the National Natural Science Foundation of China (Nos.51771113, 51971130 , 51821001 ), the United Fund of National Department of Education and Equipment Development (No. 6141A02033213 ) and the 111 Project (Grant No. B16032).
Publisher Copyright:
© 2020 Elsevier Inc.
PY - 2021/1
Y1 - 2021/1
N2 - In this paper, the dissolution, refinement and re-precipitation of long period stacking order structure and solute-segregated stacking faults (LPSO structure/SFs) in an Mg-Gd-Zn-Mn alloy fabricated by hot extruding were studied. The results demonstrate that the refinement of LPSO structure/SFs was dominated by the misalignment mechanism and re-dissolution mechanism. Dislocation slips on the LPSO structure/SFs, as well as the rapid diffusion of solute atoms was responsible for the re-dissolution of LPSO structure/SFs. As the LPSO structure/SFs dissolved, a region with supersaturated solute atoms was formed and resulting in re-precipitation of SFs in continuous dynamically recrystallized grains. Finally, the evolution model of LPSO structure/SFs during continuous dynamic recrystallization was proposed.
AB - In this paper, the dissolution, refinement and re-precipitation of long period stacking order structure and solute-segregated stacking faults (LPSO structure/SFs) in an Mg-Gd-Zn-Mn alloy fabricated by hot extruding were studied. The results demonstrate that the refinement of LPSO structure/SFs was dominated by the misalignment mechanism and re-dissolution mechanism. Dislocation slips on the LPSO structure/SFs, as well as the rapid diffusion of solute atoms was responsible for the re-dissolution of LPSO structure/SFs. As the LPSO structure/SFs dissolved, a region with supersaturated solute atoms was formed and resulting in re-precipitation of SFs in continuous dynamically recrystallized grains. Finally, the evolution model of LPSO structure/SFs during continuous dynamic recrystallization was proposed.
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U2 - 10.1016/j.matchar.2020.110756
DO - 10.1016/j.matchar.2020.110756
M3 - Article
AN - SCOPUS:85096926331
SN - 1044-5803
VL - 171
JO - Materials Characterization
JF - Materials Characterization
M1 - 110756
ER -