An investigation of formation of second phases in microalloyed, AZ31 Mg alloys with Ca, Sr and Ce

被引：55

作者：

Shang, L. ^{[1
]}

Jung, I. H. ^{[1
]}

Yue, S. ^{[1
]}

Verma, R. ^{[2
]}

Essadiqi, E. ^{[3
]}

机构：

[1] McGill Univ, Dept Mat Eng, Montreal, PQ H3A 2B2, Canada

[2] Gen Motors Res & Dev Ctr, Warren, MI 48090 USA

[3] Nat Resources Canada CANMET, Ottawa, ON K1A 0G1, Canada

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2010年 / 492卷 / 1-2期

基金：

加拿大自然科学与工程研究理事会;

关键词：

AZ31; alloy; Ca-Sr-Ce microalloying; Second phases; EPMA; FactSage (TM); MECHANICAL-PROPERTIES; MICROSTRUCTURE; IGNITION; CALCIUM;

D O I：

10.1016/j.jallcom.2009.11.159

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070305 [高分子化学与物理];

摘要：

The present work studied the formation of new phases by adding alloying additions (Ca, Sr, and Ce) in AZ31 alloy at micro-levels (approximately 0.2 wt.% per element). Quantitative electron probe micro-analysis (EPMA) was used to identify the compositions of these phases; a comparison in the morphology and distribution of an identical phase in different alloy systems was made; and the thermodynamic software of FactSage (TM) was utilized to calculate the possible intermetallic phases during solidification. The results of EPMA showed the existence of phases other than Mg-17(Al, Zn)(12) and Al8Mn5 in AZ31 alloy, namely: Al2Ca, Al2Sr, Al-11 Ce-3, Al8CeMn4, and Al-2(Ca Sr); and these new phases were thermally stable at 450 degrees C for 10h. The morphology and distribution of second phases in different alloy systems were self-consistent. These phases were well predicted by FactSage (TM) with recent light alloy database. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：173 / 183

页数：11

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