A rational interpretation of solidification microstructures in the Mg rich corner of the Mg-Al-La system

被引：4

作者：

Kim, Manjin ^{[1
]}

McDonald, Stuart D. ^{[1
]}

Abbott, Trevor B. ^{[1
,2
,3
,4
]}

Easton, Mark A. ^{[2
]}

Ali, Yahia ^{[1
]}

StJohn, David H. ^{[1
]}

Nogita, Kazuhiro ^{[1
]}

机构：

[1] Univ Queensland, Sch Mech & Min Engn, Brisbane, Qld 4072, Australia

[2] RMIT Univ, Sch Engn, Carlton, Vic 3053, Australia

[3] Monash Univ, Dept Mat Sci & Engn, Clayton, Vic 3800, Australia

[4] Magontec Ltd, Sydney, NSW 2000, Australia

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2020年 / 844卷

基金：

澳大利亚研究理事会;

关键词：

Magnesium; Aluminium; Lanthanum; Metals and alloys; Solidification; Ternary phase diagrams; TENSILE PROPERTIES; MECHANICAL-PROPERTIES; CREEP-BEHAVIOR; SAND-CAST; CE; ALLOYS; PHASE; RE; ND;

D O I：

10.1016/j.jallcom.2020.156068

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：

A range of alloys in the Mg rich corner of the Mg-Al-La ternary system have been cast to experimentally analyse the solidification microstructure. Discrepancies between our experimental observations and thermodynamic liquidus projection predictions were observed and revised solidification pathways have been confirmed in this study. The range of compositions that solidify with Mg as the primary phase is significantly smaller than what has been calculated by Pandat database (Mg 2018) but quite similar to that predicted by FactSage (FTlite). The revised solidification pathways are shown to be a useful tool for practical Mg-Al-La alloy design and avoiding the presence of the Mg17Al12 phase which has been associated with poor creep resistance of Mg-Al alloys. (C) 2020 Elsevier B.V. All rights reserved.

引用

页数：9