Effect of Ca additions on microstructure and microhardness of an as-cast Mg-5.0 wt.% Al alloy

被引：57

作者：

Han, Lihong ^{[1
]}

Hu, Henry ^{[1
]}

Northwood, Derek O. ^{[1
]}

机构：

[1] Univ Windsor, Dept Mech Automot & Mat Engn, Windsor, ON N9B 3P4, Canada

来源：

MATERIALS LETTERS | 2008年 / 62卷 / 03期

关键词：

Mg-Al-Ca alloy; hardness; indentation size effect; microstructure;

D O I：

10.1016/j.matlet.2007.05.047

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effects of Ca additions (0.5-2.0 wt.%) on the microstructure and the microhardness of an as-cast Mg-5.0 wt.% Al alloy have been investigated. The coarse microstructure of the base alloy can be refined through adding Ca. DSC and TEM results showed that, as Ca additions increased up to 1.5 wt.% Ca, the beta-Mg17Al12 phase was completely replaced by a (Al, Mg)(2)Ca phase. The Vickers microhardness of the as-cast Mg-Al-Ca alloys increased with increasing Ca content. Tests on the Mg-5.0Al-2.0Ca (wt.%) alloy showed an indentation size effect, which was well described by Meyer's Law. (C) 2007 Elsevier B.V. All rights reserved.

引用

页码：381 / 384

页数：4

共 12 条

[1] Early stages of precipitation and microstructure control in Mg-rare earth alloys
Antion, C.
Donnadieu, P.
Tassin, C.
Pisch, A.
[J]. PHILOSOPHICAL MAGAZINE, 2006, 86 (19) : 2797 - 2810
[2] COULING SL, 1972, MET ENG QUART, V12, P7
[3] Potential magnesium alloys for high temperature die cast automotive applications: A review
Hu, H
Yu, A
Li, NY
Allison, JE
[J]. MATERIALS AND MANUFACTURING PROCESSES, 2003, 18 (05) : 687 - 717
[4] Hu H., 2003, AFS T, V111, P1019
[5] Hardness and microstructural analysis of Bi1.6Pb0.4Sr2Ca2-xSmxCu3Oy polycrystalline superconductors
Kolemen, U.
Uzun, O.
Yilmazlar, M.
Guclu, N.
Yanmaz, E.
[J]. JOURNAL OF ALLOYS AND COMPOUNDS, 2006, 415 (1-2) : 300 - 306
[6] LUO A, 2001, TMS ANN M, P137
[7] Size effects in micro- and nanoscale indentation
Manika, Eze
Maniks, Janis
[J]. ACTA MATERIALIA, 2006, 54 (08) : 2049 - 2056
[8] Ozturk K, 2003, JOM-J MIN MET MAT S, V55, pA40
[9] Structure and transition of eutectic (Mg,Al)2Ca Laves phase in a die-cast Mg-Al-Ca base alloy
Suzuki, A
Saddock, ND
Jones, JW
Pollock, TM
[J]. SCRIPTA MATERIALIA, 2004, 51 (10) : 1005 - 1010
[10] Wei LY, 1996, MATER SCI TECH SER, V12, P741, DOI 10.1179/026708396790122350

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