Specifications

Publication year: 2013
Pages: 1226-1230
Language: Chinese
ISSN: 1002185X
CODEN: XJCGEA
Document type: Journal article (JA)
Publisher: Rare Metals Materials and Engineering Press, P.O. Box 51, Xi'an, 721014,
China
Abstract: As-cast ingots of Mg-8Li-4Zn-xY magnesium alloy were prepared by lithium flux
protection in an electric-resistance furnace, and 1 mm thick sheets were prepared by forward
extrusion. Microstructures and mechanical properties of the alloy were investigated with OM,
SEM equipped with an energy-dispersive X-ray spectroscopy (EDS), XRD and the HV-120 hardness
Vickers. The results show that the matrix of as-cast Mg-8Li-4Zn-xY alloy consists of α-Mg
(hexagonal close-packed) and β-Li (body-centered cubic) phase. The precipitation strengthening
phase particles and compounds are Mg2Zn11, Mg72.05Zn27.95, MgZn, Mg2Y, MgY and unknown
phase. The matrixes of Mg-8Li-4Zn-xY magnesium alloy ingots are refined and the amount of the
precipitation strengthening phase are enhanced along with the yttrium content increasing, but
there is no appreciable changing of the matrix size, appearance and dispersion precipitation
phases in β-Li phase. On the contrary, the α-Mg phases wrapped by β-Li phase are elongated and
refined during the extrusion process, and paralleled to the extrusion direction as stripped. The
β-Li phases could coordinate plastic deformation and synchronize dynamic recrystallization, and
the strengthening phases are of uniform distribution on the crystal boundary. The ingots and 1
mm thick sheets of Mg-8Li-4Zn-xY alloys are strengthened and the hardnesses are also enhanced
in different extent along with the yttrium content increasing.
Number of references: 18
Main heading: Lithium
Controlled terms: Alloys - Dynamic recrystallization - Energy dispersive
spectroscopy - Extrusion - Hardness - Ingots - Magnesium alloys - Mechanical
properties - Microstructure - Precipitation (chemical) - Yttrium - Yttrium alloys - Zinc
Uncontrolled terms: Energy dispersive x-ray spectroscopy - Hexagonal
close-packed - Mg-Li alloy - Microstructure and mechanical properties - Microstructures
and mechanical properties - Precipitation strengthening - Strengthening phasis - Uniform
distribution
Classification code: 933 Solid State Physics - 802.3 Chemical Operations - 801
Chemistry - 549 Nonferrous Metals and Alloys - 951 Materials Science - 546.3 Zinc and
Alloys - 534.2 Foundry Practice - 531.1 Metallurgy - 421 Strength of Building Materials;
Mechanical Properties - 535.2.2 Metal Forming Practice
Database: Compendex
Compilation and indexing terms, © 2013 Elsevier Inc.
15.
Accession number: 20132916515349
Title: The characters of freeze-thaw deformation and the treatment technics of road
slopes in plateau and mountain area
Authors: Xu, Shuanhai1 ; Li, Ning2 ; Cao, Zubao3 ; Liu, Dan4/;李宁;;;