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Designing pulse laser surface modification of H13 steel using response surface method

Aqida, S.N. and Brabazon, Dermot and Naher, Sumsun (2011) Designing pulse laser surface modification of H13 steel using response surface method. In: Advances in Materials and Processing Technologies (AMPT) 2010, 24-27 Oct 2010, Paris, France.

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This paper presents a design of experiment (DOE) for laser surface modification process of AISI H13 tool steel in achieving the maximum hardness and minimum surface roughness at a range of modified layer depth. A Rofin DC-015 diffusion-cooled CO2 slab laser was used to process AISI H13 tool steel samples. Samples of 10 mm diameter were sectioned to 100 mm length in order to process a predefined circumferential area. The parameters selected for examination were laser peak power, overlap percentage and pulse repetition frequency (PRF). The response surface method with Box-Behnken design approach in Design Expert 7 software was used to design the H13 laser surface modification process. Metallographic study and image analysis were done to measure the modified layer depth. The modified surface roughness was measured using two-dimensional surface profilometer. The correlation of the three laser processing parameters and the modified surface properties was specified by plotting three-dimensional graph. The hardness properties were tested at 981 mN force. From metallographic study, the laser modified surface depth was between 37 8m and 150 8m. The average surface roughness recorded from the 2D profilometry was at a minimum value of 1.8 8m. The maximum hardness achieved was between 728 and 905 HV0.1.These findings are significant to modern development of hard coatings for wear resistant applications.

Item Type:Conference or Workshop Item (Paper)
Event Type:Conference
Uncontrolled Keywords:AISI H13 tool steel; laser surface modification; hardness; surface roughness
Subjects:Engineering > Materials
Engineering > Mechanical engineering
DCU Faculties and Centres:Research Initiatives and Centres > Materials Processing Research Centre (MPRC)
DCU Faculties and Schools > Faculty of Engineering and Computing > School of Mechanical and Manufacturing Engineering
Published in:Proceedings of the International Conference on Advances in Materials and Processing Technologies 2010. AIP Conference Proceedings 1315. American Institute of Physics.
Publisher:American Institute of Physics
Official URL:
Copyright Information:© 2011 American Institute of Physics.
Use License:This item is licensed under a Creative Commons Attribution-NonCommercial-Share Alike 3.0 License. View License
ID Code:16680
Deposited On:10 Nov 2011 11:40 by Fran Callaghan. Last Modified 10 Nov 2011 11:40

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