Segregation of solute atoms along deformation-induced boundaries in an Mg–Zn–Y alloy containing long period stacking ordered phase

X. H. Shao, Q. Q. Jin, Y. T. Zhou, H. J. Yang, S. J. Zheng, B. Zhang, Qiang Chen, X. L. Ma

Research output: Contribution to journalArticle

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Abstract

The interfacial segregation plays an important role in affecting the mechanical performance of various materials. Here we study the segregation behaviors along deformation-induced interfaces in the matrix of an Mg 97 Zn 1 Y 2 (at%) alloy compressed at 473 K using atomic-scale high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM) imaging techniques. The kink boundary, twinning-like boundary, and tilt boundary within the matrix grain are detected to be segregated with both solute Zn and Y atoms. The segregation along kink boundary and twinning-like boundary is closely linked to the associated partial dislocations, and these boundaries also could be regarded as the nucleation sites for the formation of long period stacking ordered (LPSO) structures of nanometer scale and stacking faults (SFs) during deformation. For the various tilt boundary, the segregation could be explained based on either the O-lattice theory or partial dislocations. The experimental results may shed some new light on tailoring microstructures for improving mechanical properties and thermal stability of magnesium alloys.

Original languageEnglish
Article number100287
JournalMaterialia
Volume6
DOIs
Publication statusPublished - Jun 1 2019

Fingerprint

Twinning
Lattice theory
Atoms
Stacking faults
Magnesium alloys
Thermodynamic stability
Nucleation
Transmission electron microscopy
Imaging techniques
Mechanical properties
Microstructure
Scanning electron microscopy

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

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Segregation of solute atoms along deformation-induced boundaries in an Mg–Zn–Y alloy containing long period stacking ordered phase. / Shao, X. H.; Jin, Q. Q.; Zhou, Y. T.; Yang, H. J.; Zheng, S. J.; Zhang, B.; Chen, Qiang; Ma, X. L.

In: Materialia, Vol. 6, 100287, 01.06.2019.

Research output: Contribution to journalArticle

Shao, X. H. ; Jin, Q. Q. ; Zhou, Y. T. ; Yang, H. J. ; Zheng, S. J. ; Zhang, B. ; Chen, Qiang ; Ma, X. L. / Segregation of solute atoms along deformation-induced boundaries in an Mg–Zn–Y alloy containing long period stacking ordered phase. In: Materialia. 2019 ; Vol. 6.
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AU - Chen, Qiang

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