Formation of Rare Earth Intermetallics in Al-Cu Cast Alloys

被引：1

作者：

Mahmoud, M. G. ^{[1
]}

Samuel, A. M. ^{[2
]}

Doty, H. W. ^{[3
]}

Samuel, F. H. ^{[2
]}

机构：

[1] Cairo Univ, Fac Engn, Mech Design & Prod Dept, Giza, Egypt

[2] Univ Quebec Chicoutimi, Dept Sci Appl, Saguenay, PQ, Canada

[3] Gen Motors Mat Engn, 823 Joslyn Ave, Pontiac, MI 48340 USA

来源：

LIGHT METALS 2020 | 2020年

关键词：

Rare earth (RE) metals; Ce; La; Al-Cu alloy; Solidification rate; EPMA; WDS analysis; HEAT-TREATMENT; COOLING RATE; A356.2; MISCHMETAL; A319.1;

D O I：

10.1007/978-3-030-36408-3_34

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

The present research study aimed at investigating the effect of additions of Ce and La rare earth (RE) elements on intermetallic formation in Al-1.2Si-2.4Cu-0.4 Mg-0.4 Fe-0.6Mn-0.15Ti (wt%) alloy, coded B0. Microstructural characteristics were examined under low solidification rate (similar to 0.7 degrees C/s). The result show that two main types of RE-containing intermetallic phases were formed: (i) a grey phase in the form of sludge, with a fixed composition Al21Ti2RE (Ce/La), and (ii) white RE-containing intermetallic phases (resulting from reaction of the RE (Ce/La) with Si, Fe, and Cu); the latter exhibited several compositions: Al11RE(Ce/La)(3)(Cu,Fe)(4)Si-2, Al4Ce3Si2, Al5La3Si2 and Al6La2(Cu,Fe)(2)Si.

引用

页码：241 / 246

页数：6

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