The Relationship of Processing Parameters and Surface Topography of Selective Laser Melted GH4169 Alloy

Abstract:

Selective laser melting (SLM) technology based on powder bed has been used to manufacture GH4169 samples. In the present work, taking Ni-based powders of GH4169 as experiment material, the good technological parameters of SLM were determined by analyzing the effect of the laser electric current, the scan speed ,the laser pulse width, the laser light frequency, the push powder thickness, the scan interval and the scanning way on Single-layer single-channel scanning, single-layer multi-channel scanning and multi-level multi-channel scanning. The effects of process parameters on the powder formability was analyzed. The cross-sections morphology and density of the block specimen prepared under the different SLM process parameter were studied. The optimal process parameters were the scanning speed of 150 mm/min, the laser pulse width of 5.0 ms, the push powder thickness of 0.15 mm, the scanning current of 140 A, the laser light frequency of 12Hz and the scan interval of 0.25mm.

• Periodical: Materials Science Forum (Volume 893)
• Pages: 207-211
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.893.207
• Online since: March 2017
• Authors: Bin Liu, Pei Kang Bai, Yu Xin Li, P. Liu*
• Keywords: Appearance, GH4169, Morphology, Scanning Line Width, Selective Laser Melt (SLM)

References

[1] Ladewig A, Schlick G, Fisser M, et al. Influence of the shielding gas flow on the removal of process by-products in the selective laser melting process[J]. Additive Manufacturing, 2016, 10: 1-9.

DOI: 10.1016/j.addma.2016.01.004

[2] Wang D, Song C, Yang Y, et al. Research on the redesign of precision tools and their manufacturing process based on selective laser melting (SLM)[J]. Rapid Prototyping Journal, 2016, 22(1): 104-114.

DOI: 10.1108/rpj-02-2014-0021

[3] Olakanmi E O, Cochrane R F, Dalgarno K W. A review on selective laser sintering/melting (SLS/SLM) of aluminium alloy powders: Processing, microstructure, and properties[J]. Progress in Materials Science, 2015, 74: 401-477.

DOI: 10.1016/j.pmatsci.2015.03.002

[4] Dong P, Chen J. Current Status of Selective Laser Melting for Aerospace Applications Abroad[J]. Aerospace Manufacturing Technology, (2014).

[5] Casavola C, Campanelli S L, Pappalettere C. Preliminary investigation on the residual strain distribution due to the Selective Laser Melting Process[J]. Journal of Strain Analysis for Engineering Design, 2009, 44(1): 93-104.

DOI: 10.1243/03093247jsa464

[6] Jerrard, Eveleigh P G. Selective laser melting of advanced metal alloys for aerospace applications[J]. University of Exeter, (2011).

[7] Flege C, Vogt F, Höges S, et al. Development and characterization of a coronary polylactic acid stent prototype generated by selective laser melting. [J]. Journal of Materials Science Materials in Medicine, 2013, 24(1): 241-55.

DOI: 10.1007/s10856-012-4779-z

[8] Z Hu, H Zhu, H Zhang, et al. Experimental investigation on selective laser melting of 17-4PH stainless steel[J]. Optics & Laser Technology, 2017, 87: 17-25.

DOI: 10.1016/j.optlastec.2016.07.012

[9] Chen G, Zhang Y, Xu D K, et al. Low Cycle Fatigue and Creep-Fatigue Interaction Behavior of Nickel-Base Superalloy GH4169 at Elevated Temperature of 650°C[J]. Materials Science & Engineering A, 2016, 655: 175-182.

DOI: 10.1016/j.msea.2015.12.096

[10] CA Griffiths, J Howarth, GD Almeida-Rowbotham, et al. A design of experiments approach for the optimisation of energy and waste during the production of parts manufactured by 3D printing[J]. Journal of Cleaner Production, 2016: 74–85.

DOI: 10.1016/j.jclepro.2016.07.182

[11] Li R, Liu J, Shi Y, et al. 316L Stainless Steel with Gradient Porosity Fabricated by Selective Laser Melting[J]. Journal of Materials Engineering & Performance, 2010, 19(5): 666-671.

DOI: 10.1007/s11665-009-9535-2

[12] Yadroitsev I, Thivillon L, Bertrand P, et al. Strategy of manufacturing components with designed internal structure by selective laser melting of metallic powder[J]. Applied Surface Science, 2007, 254(4): 980-983.

DOI: 10.1016/j.apsusc.2007.08.046

[13] Jinhui L, Ruidi L, Wenxian Z, et al. Study on formation of surface and microstructure of stainless steel part produced by selective laser melting[J]. Materials Science & Technology, 2013, volume 26(26): 1259-1264.

DOI: 10.1179/174328409x441300