Structural characteristics of β1′ precipitates in Mg-Zn-based alloys

Alok Singh; A. P. Tsai

doi:10.1016/j.scriptamat.2007.07.028

Structural characteristics of β₁^′ precipitates in Mg-Zn-based alloys

Alok Singh, A. P. Tsai

Research output: Contribution to journal › Article › peer-review

85 Citations (Scopus)

Abstract

β₁^′ precipitates in an Mg₉₇Zn_2.5Y_0.5 alloy are shown to have a complex domain structure based on the structure of monoclinic Mg₄Zn₇ phase. All domains are oriented with [0 1 0]∥[0 0 0 1]_Mg and one of the four planar matches with the matrix. Two of these orientations are related to two others by twinning on the (0 0 1) plane of the Mg₄Zn₇ phase. These orientations are brought about by crystallographic constraints from the matrix. An ordering of the domains creates a new structure.

Original language	English
Pages (from-to)	941-944
Number of pages	4
Journal	Scripta Materialia
Volume	57
Issue number	10
DOIs	https://doi.org/10.1016/j.scriptamat.2007.07.028
Publication status	Published - 2007 Nov

Keywords

Domain structure
Electron diffraction
Magnesium alloys
Precipitation
Transmission electron microscopy (TEM)

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering
Metals and Alloys

Access to Document

10.1016/j.scriptamat.2007.07.028

Cite this

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title = "Structural characteristics of β1′ precipitates in Mg-Zn-based alloys",

abstract = "β1′ precipitates in an Mg97Zn2.5Y0.5 alloy are shown to have a complex domain structure based on the structure of monoclinic Mg4Zn7 phase. All domains are oriented with [0 1 0]∥[0 0 0 1]Mg and one of the four planar matches with the matrix. Two of these orientations are related to two others by twinning on the (0 0 1) plane of the Mg4Zn7 phase. These orientations are brought about by crystallographic constraints from the matrix. An ordering of the domains creates a new structure.",

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AB - β1′ precipitates in an Mg97Zn2.5Y0.5 alloy are shown to have a complex domain structure based on the structure of monoclinic Mg4Zn7 phase. All domains are oriented with [0 1 0]∥[0 0 0 1]Mg and one of the four planar matches with the matrix. Two of these orientations are related to two others by twinning on the (0 0 1) plane of the Mg4Zn7 phase. These orientations are brought about by crystallographic constraints from the matrix. An ordering of the domains creates a new structure.

KW - Domain structure

KW - Electron diffraction

KW - Magnesium alloys

KW - Precipitation

KW - Transmission electron microscopy (TEM)

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