INTERDEPENDENCE BETWEEN COOLING RATE, MICROSTRUCTURE AND POROSITY IN MG ALLOY AE42

被引：0

作者：

Wang, Liang ^{[1
]}

Rhee, Hongjoo ^{[1
]}

Felicelli, Sergio D. ^{[2
]}

Sabau, Adrian S. ^{[3
]}

Berry, John T. ^{[2
]}

机构：

[1] Mississippi State Univ, Ctr Adv Vehicular Syst, Mississippi State, MS 39762 USA

[2] Mississippi State Univ, Dept Mech Engn, Mississippi State, MS 39762 USA

[3] Oak Ridge Natl Lab, Div Met & Ceram, Oak Ridge, TN 37831 USA

来源：

MAGNESIUM TECHNOLOGY 2009 | 2009年

关键词：

Magnesium alloy; AE42; Oxide film; Porosity; ENTRAINMENT DEFECTS; CASTINGS;

D O I：

暂无

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

Porosity is a major concern in the production of light metal parts. This work aims to identify some of the mechanisms of microporosity formation during the gravity-poured castings of magnesium alloy AE42. Two graphite plate molds and a ceramic cylindrical mold were selected to produce a wide range of cooling rates. Temperature data during cooling was acquired with type K thermocouples at 60 Hz at two or three locations of each casting.. The microstructure of samples extracted from the regions of measured temperature was then characterized with optical metallography. The results of this study revealed the existence of oxide film defects, similar to those observed in aluminum alloys. The cooling rates showed significant effect on the formation of porosity.

引用

页码：249 / +

页数：3

共 9 条

[1] Effects of solidification rate and ageing on the microstructure and mechanical properties of AZ91 alloy
Cáceres, CH
Davidson, CJ
Griffiths, JR
Newton, CL
[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2002, 325 (1-2): : 344 - 355
[2] Entrainment defects
Campbell, J
[J]. MATERIALS SCIENCE AND TECHNOLOGY, 2006, 22 (02) : 127 - 145
[3] Campbell J., 2003, CASTINGS NEW METALLU, P17
[4] Double oxide film defects in cast magnesium alloy
Griffiths, W. D.
Lai, N.-W.
[J]. METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 2007, 38A (01): : 190 - 196
[5] GRIFFITHS WD, 2007, 2008R0023 MSUCAVSCMD
[6] Commentaries on 'Entrainment defects' by J Campbell
Knott, John
Beeley, P. R.
Griffiths, J. R.
Green, N. R.
Newton, C. J.
Campbell, John
[J]. MATERIALS SCIENCE AND TECHNOLOGY, 2006, 22 (08) : 999 - 1008
[7] Entrained oxide films in TiAl castings
Mi, J
Harding, RA
Wickins, M
Campbell, J
[J]. INTERMETALLICS, 2003, 11 (04) : 377 - 385
[8] A method to study the history of a double oxide film defect in liquid aluminum alloys
Raiszadeh, R.
Griffiths, W. D.
[J]. METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE, 2006, 37 (06): : 865 - 871
[9] Quantitative characterisation of correlations between casting defects and mechanical strength of Al-7Si-Mg alloy castings
Yang, X
Huang, X
Dai, X
Campbell, J
Grant, RJ
[J]. MATERIALS SCIENCE AND TECHNOLOGY, 2006, 22 (05) : 561 - 570

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