Densification and microstructural evolution during laser sintering of A356/SiC composite powders
Source abstract
Abstract
This article reports experimental results on laser sintering of A356 aluminum alloy and A356/SiC composite powders. Effects of scan rate, sintering atmosphere, hatch spacing, and SiC volume fraction (up to 20%), and particle size (7 and 17 μm) on the densification were studied. The phase formation and microstructural development were analyzed by X-ray diffraction (XRD) and scanning electron microscopy (SEM) coupled with energy-dispersive X-ray spectroscopy (EDS). Laser sintering under argon atmosphere exhibited higher densification compared to nitrogen. A faster sintering kinetics was observed as the scan rate decreased. Except at a low SiC content (5 vol%), the composite powders exhibited lower densification kinetics. The densification was improved when finer SiC particles were utilized. Microstructural studies revealed directional solidification of aluminum melt to form columnar grains with inter-columnar silicon precipitates. In the presence of SiC particles, aluminum melt reacted with the ceramic particles to form Al4SiC4 plates.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Aluminum Alloys Composites Properties · Advanced ceramic materials synthesis · Additive Manufacturing and 3D Printing Technologies
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (22)
Show source-provided references
1. Simchi A (2006) Mater Sci Eng 428A:14810.1016/j.msea.2006.04.117 ↗
2. Simchi A (2004) Metall Mater Trans 35B:93710.1007/s11663-004-0088-3 ↗
3. Traini T, Mangano C, Sammons RL, Mangano F, Macchi A, Piattelli A (2008) Dent Mater 24:152510.1016/j.dental.2008.03.029 ↗
4. Gu DD, Shen YF (2006) Metall Mater Trans 37B:967
5. Fischer P, Romano V, Weber HP, Kolossov S (2004) Thin Solid Films 453–454:13910.1016/j.tsf.2003.11.152 ↗
6. Kruth JP, Froyen L, Rombouts M, Van Vaerenbergh J, Mercells P (2003) CIRP Ann Manuf Technol 52:13910.1016/S0007-8506(07)60550-2 ↗
7. Simchi A, Petzoldt F, Pohl H (2001) Int J Powder Metall 37:49
8. Liu DM, Si TZ, Wang CC, Zhang QA (2007) Scripta Mater 57:38910.1016/j.scriptamat.2007.05.011 ↗
9. Gu DD, Shen YF (2006) Mater Sci Eng A435–436:54
10. Gåård A, Krakhmalev P, Bergström J (2006) J Alloy Compd 421:16610.1016/j.jallcom.2005.09.084 ↗
11. Leong CC, Lu L, Fuh JYH, Wong YS (2002) Mater Sci Eng A338:8110.1016/S0921-5093(02)00050-3 ↗
12. Tan KH, Chua CK, Leong KF, Cheah CM, Cheang P, Abu Bakar MS, Cha SW (2003) Biomaterials 24:311510.1016/S0142-9612(03)00131-5 ↗
13. Shishkovsky I, Yadroitsev I, Bertrand Ph, Smurov I (2007) Appl Surf Sci 254:96610.1016/j.apsusc.2007.09.001 ↗
14. Ramesha CS, Srinivas CK, Channabasappa BH (2009) Wear 267:177710.1016/j.wear.2008.12.026 ↗
15. Vaucher S, Paraschivescu D, Andre C, Beffort O (2002) In: Materials week, 30.09.–2.10.2002, ICM-Munich, ISBN: 3-88355-314-X
16. Simchi A, Godlinski D (2008) Scripta Mater 59:19910.1016/j.scriptamat.2008.03.007 ↗
17. Viala JC, Fortier P, Bouix J (1990) J Mater Sci 25:1842. doi: 10.1007/BF0104539510.1007/BF01045395 ↗
18. Gacsi Z, Kovacs J, Pieczonka T, Buza G (2002) Surf Coat Technol 151–152:32010.1016/S0257-8972(01)01587-0 ↗
19. Kurtz W, Fischer DJ (1992) Fundamentals of solidification. Trans. Tech. Publications, Aedermannsdorf, Switzerland
20. Grabowski A, Nowak M, Sleziona J (2005) Opt Lasers Eng 43:23310.1016/j.optlaseng.2004.06.010 ↗
21. Anandkumar R, Almeida A, Colaço R, Vilar R, Ocelik V, De Hosson J, Th M (2007) Surf Coat Technol 201:949710.1016/j.surfcoat.2007.04.003 ↗
22. Lee J-C, Byun J-Y, Oh C-S, Sek H-K, Lee H-I (1997) Acta Mater 45:530310.1016/S1359-6454(97)84851-3 ↗