Effects of precipitates on grain size and mechanical properties of AZ31-x% Nd magnesium alloy

The effects of precipitates on grain size and mechanical properties of as-cast AZ3 1-x%Nd magnesium alloy were investi- gated, and the affecting mechanism was also discussed. The results indicated that Al2Nd phase, AlllNd3 phase and a few AI-Mn-Nd-Fe phase were furmed when adding 0.38 wt.%-1.46 wt.%...

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Bibliographic Details
Published inJournal of rare earths Vol. 32; no. 5; pp. 451 - 457
Main Author 张爱民 郝海 刘晓滕 张兴刚
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.05.2014
Subjects
Aluminum
AZ31 magnesium alloy
AZ31合金
Grain size
Magnesium base alloys
mechanical properties
microstructure
Nd同位素
Neodymium
Phase transformations
Precipitates
Rare earth metals
rare earths
Ultimate tensile strength
力学性能
拉伸性能
晶粒尺寸
沉淀物
钕含量
镁合金
microstructure
AZ31 magnesium alloy
Nd
mechanical properties
rare earths
Online AccessGet full text
ISSN1002-0721
2509-4963
DOI10.1016/s1002-0721(14)60093-4

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Summary:The effects of precipitates on grain size and mechanical properties of as-cast AZ3 1-x%Nd magnesium alloy were investi- gated, and the affecting mechanism was also discussed. The results indicated that Al2Nd phase, AlllNd3 phase and a few AI-Mn-Nd-Fe phase were furmed when adding 0.38 wt.%-1.46 wt.% Nd into AZ31 melt, coarse AI2Nd transformed into Al11Nd3 gradually with the increasing of Nd content. Due to structure and size transformation and content increasing of AI-Nd phase, the grain size of AZ31-x% Nd alloy increased firstly, and then decreased with the increment of Nd content. After reaching a minimum value, once again it rose up, provided that Nd content was further increased. The tensile property reached its optimal value when the adding amount of Nd content was 1.05 wl.%, however, adding excessive amount of Nd deteriorated both ultimate strength and elongation ofAZ31 alloy.
Bibliography:ZHANG Aimin, HAO Hai, LIU Xiaoteng , ZHANG Xingguo （School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, China）
11-2788/TF
The effects of precipitates on grain size and mechanical properties of as-cast AZ3 1-x%Nd magnesium alloy were investi- gated, and the affecting mechanism was also discussed. The results indicated that Al2Nd phase, AlllNd3 phase and a few AI-Mn-Nd-Fe phase were furmed when adding 0.38 wt.%-1.46 wt.% Nd into AZ31 melt, coarse AI2Nd transformed into Al11Nd3 gradually with the increasing of Nd content. Due to structure and size transformation and content increasing of AI-Nd phase, the grain size of AZ31-x% Nd alloy increased firstly, and then decreased with the increment of Nd content. After reaching a minimum value, once again it rose up, provided that Nd content was further increased. The tensile property reached its optimal value when the adding amount of Nd content was 1.05 wl.%, however, adding excessive amount of Nd deteriorated both ultimate strength and elongation ofAZ31 alloy.
AZ31 magnesium alloy; Nd; microstructure; mechanical properties; rare earths
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ISSN:1002-0721
2509-4963
DOI:10.1016/s1002-0721(14)60093-4