Microstructure of Mg-5Al-0.4Mn-xRE (x=3 and 5 wt.%) alloys in as-cast conditions and after annealing

被引：19

作者：

Braszczynska-Malik, K. N. ^{[1
]}

Grzybowska, A. ^{[1
]}

机构：

[1] Czestochowa Tech Univ, Inst Mat Engn, Al Armii Krajowej 19, PL-42200 Czestochowa, Poland

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2016年 / 663卷

关键词：

Magnesium alloys; Rare earth elements; As-cast conditions; Heat treatment; Microstructure; MECHANICAL-PROPERTIES; CORROSION BEHAVIOR; TENSILE PROPERTIES; CREEP RESISTANCE; RE;

D O I：

10.1016/j.jallcom.2015.12.029

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The microstructure investigations of two AME503 and AME505 experimental alloys in as-cast conditions and after long-time annealing were presented. The investigated materials were fabricated on the basis of the AM50 commercial magnesium alloy with 3 and 5 wt.% cerium rich mish metal. Analyses of the alloy microstructures were carried out by light microscopy, XRD, scanning and transmission electron microscopy. In as-cast conditions both the alloys were mainly composed of alpha-Mg, AI(11)RE(3) and Al10RE2Mn7 intermetallic phases. Additionally, due to non-equilibrium solidification conditions, a small amount of alpha + gamma divorced eutectic and Al2RE intermetallic phase were revealed. Long-time annealing at 473 K for 1000 h did not change the above main structural constituents. During annealing, the gamma (Mg17Al12) secondary precipitation process took place in areas enriched in aluminium during solidification. The gamma secondary precipitates were mainly observed in the interdendritic regions and around the alpha + gamma eutectic. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：172 / 179

页数：8

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