Solute atom segregation to I1 stacking fault and its bounding partial dislocations in a Mg–Bi alloy

Solute atom segregation to I1 stacking fault and its bounding partial dislocations in a Mg–Bi alloy

Stacking faults (SFs) and the interaction between solute atoms and SFs in a Mg–Bi alloy are investigated using aberration-corrected scanning transmission electron microscopy. It is found that abundant I1 SFs are generated after cold rolling and are mainly distributed inside {101¯2} twins. After agin...

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Bibliographic Details
Main Authors: Cong He, Yong Zhang, Zhiqiao Li, Houwen Chen, Jian-Feng Nie
Format: Article
Language:English
Published: KeAi Communications Co., Ltd. 2024-08-01
Series:Journal of Magnesium and Alloys
Subjects:
Mg alloys
Suzuki segregation
Stacking fault
Frank partial dislocation
Online Access:http://www.sciencedirect.com/science/article/pii/S221395672200305X
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Summary:Stacking faults (SFs) and the interaction between solute atoms and SFs in a Mg–Bi alloy are investigated using aberration-corrected scanning transmission electron microscopy. It is found that abundant I1 SFs are generated after cold rolling and are mainly distributed inside {101¯2} twins. After aging treatment, the formation of single-layer and three-layer Bi atom segregation in the vicinity of I1 fault are clearly observed. Bi segregation also occurs at the 1/6<22¯03> bounding Frank partial dislocation cores. The segregation behaviors in I1 fault and Frank dislocations are discussed and rationalized using first-principles calculations.
ISSN:2213-9567

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