Fatigue Life and Microstructure after Multiple Remelting of A359 Matrix Composites Reinforced with SiC Particles

Open access

Abstract

The article presents the results of fatigue life tests and microstructure examinations of A359 alloy matrix composites (F3S.10S and F3S.30S) containing 10 and 30wt% of SiC particles, subjected to multiple remelting by conventional gravity casting. Mechanical characteristics were determined in a modified low cycle fatigue (MLCF) test, enabling rapid estimation of fatigue life and other mechanical parameters in practice of any material. Qualitative and quantitative metallographic examinations were also carried out. The quantitative evaluation of microstructure was performed by computer image analysis. A set of geometrical parameters of the reinforcing particles, pores and eutectic precipitates present in the metal matrix was determined. The relationships between the mechanical parameters, structural characteristics and the number of remelting operations were presented. It was found that up to the fourth remelting, the mechanical characteristics, including fatigue life, are slightly deteriorated but decrease gradually in the subsequent operations of remelting. The observed effect is mainly due to the shrinkage porosity occurring as a result of gravity casting. To eliminate this defect, the use of squeeze casting process was recommended. It has also been shown that multiple remelting can be an easy and economically well-founded alternative to other more expensive recycling methods.

[1] J. Sobczak, Kompozyty metalowe 2001 Instytut Odlewnictwa i Instytut Transportu Samochodowego, Kraków-Warszawa.

[2] Klasik, J. Sobczak, K. Pietrzak, N. Sobczak, A. Wojciechowski, Influence of multiple remelting of particulate reinforced cast aluminum composites on their properties and structure, 2012 Warsaw-Cracow.

[3] K. Pietrzak, K. Makowska, J. Sobczak, A. Wojciechowski, D. Rudnik, Journal of Materials Eng. and Performance. 1-7 (2016), DOI: 10.1007/s11665-015-1870-x.

[4] K. Pietrzak, A. Klasik, M. Maj, J. Sobczak, A. Wojciechowski, Mechanik (2016), accepted for print.

[5] M. Maj, Zastosowanie zmodyfikowanej niskocyklowej próby zmęczeniowej do wyznaczania właściwości mechanicznych żeliwa ADI w temperaturze podwyższonej i pokojowej. Projekt badawczy nr 4 T 08B 006 25, Kraków 2005.

[6] M. Maj, Trwałość zmęczeniowa wybranych stopów odlewniczych, 2012 Wyd. Archives of Foundry Engineering, Katowice-Gliwice.

[7] M. Maj, J. Piekło, Arch. of Metall. and Mater. 54 (2), 393-397 (2009).

[8] Labib, L ’effet des niveaux de refroidissement (température de du moule) et des traitements Thermiques sur les propriétés mécaniques et sur la Microstructure des deux alliages composites Al-Si-Mg/SiC/10p, 1993 Université du Québec à Chicoutimi, Québec.

[9] D. J. Lloyd, E. Dewing, Stability of SiC in Molten Aluminum, in D. S. Wilkinson (Ed.) Advanced Structural Materials, 71-78, Pergamon Press, New York 1989.

[10] A359 Al alloy reinforced with irregularly shaped SiC particles http://bricad.com/aluminium/dur/guides/awg/index.html.

Archives of Metallurgy and Materials

The Journal of Institute of Metallurgy and Materials Science and Commitee on Metallurgy of Polish Academy of Sciences

Journal Information


IMPACT FACTOR 2016: 0.571
5-year IMPACT FACTOR: 0.776

CiteScore 2016: 0.85

SCImago Journal Rank (SJR) 2016: 0.347
Source Normalized Impact per Paper (SNIP) 2016: 0.740

Metrics

All Time Past Year Past 30 Days
Abstract Views 0 0 0
Full Text Views 183 121 10
PDF Downloads 75 55 8