An Investigation of Phase Transformation and Crystallinity in Laser Surface Modified H13 Steel

This paper presents a laser surface modification process of AISI H13 tool steel using 0.09, 0.2 and 0.4 mm size of laser spot with an aim to increase hardness properties. A Rofin DC-015 diffusion-cooled CO2 slab laser was used to process AISI H13 tool steel samples. Samples of 10 mm diameter were se...

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Main Authors:	S. N., Aqida, Brabazon, Dermot, S., Naher
Format:	Article
Language:	English
Published:	Springer 2013
Subjects:	TJ Mechanical engineering and machinery
Online Access:	http://umpir.ump.edu.my/id/eprint/5858/ http://umpir.ump.edu.my/id/eprint/5858/ http://umpir.ump.edu.my/id/eprint/5858/ http://umpir.ump.edu.my/id/eprint/5858/1/hrini.pdf

id	ump-5858
recordtype	eprints
spelling	ump-58582018-01-22T07:55:14Z http://umpir.ump.edu.my/id/eprint/5858/ An Investigation of Phase Transformation and Crystallinity in Laser Surface Modified H13 Steel S. N., Aqida Brabazon, Dermot S., Naher TJ Mechanical engineering and machinery This paper presents a laser surface modification process of AISI H13 tool steel using 0.09, 0.2 and 0.4 mm size of laser spot with an aim to increase hardness properties. 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). X-ray diffraction analysis (XRD) was conducted to measure crystallinity of the laser-modified surface. X-ray diffraction patterns of the samples were recorded using a Bruker D8 XRD system with Cu K α (λ=1.5405 Å) radiation. The diffraction patterns were recorded in the 2θ range of 20 to 80°. The hardness properties were tested at 981 mN force. The laser-modified surface exhibited reduced crystallinity compared to the un-processed samples. The presence of martensitic phase was detected in the samples processed using 0.4 mm spot size. Though there was reduced crystallinity, a high hardness was measured in the laser-modified surface. Hardness was increased more than 2.5 times compared to the as-received samples. These findings reveal the phase source of the hardening mechanism and grain composition in the laser-modified surface. Springer 2013 Article PeerReviewed application/pdf en http://umpir.ump.edu.my/id/eprint/5858/1/hrini.pdf S. N., Aqida and Brabazon, Dermot and S., Naher (2013) An Investigation of Phase Transformation and Crystallinity in Laser Surface Modified H13 Steel. Applied Physics A, 110 (3). pp. 673-678. ISSN 0947-8396 (Print) 1432-0630 (Online) http://link.springer.com/journal/339/110/3/page/2 DOI: 10.1007/s00339-012-7149-2
repository_type	Digital Repository
institution_category	Local University
institution	Universiti Malaysia Pahang
building	UMP Institutional Repository
collection	Online Access
language	English
topic	TJ Mechanical engineering and machinery
spellingShingle	TJ Mechanical engineering and machinery S. N., Aqida Brabazon, Dermot S., Naher An Investigation of Phase Transformation and Crystallinity in Laser Surface Modified H13 Steel
description	This paper presents a laser surface modification process of AISI H13 tool steel using 0.09, 0.2 and 0.4 mm size of laser spot with an aim to increase hardness properties. 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). X-ray diffraction analysis (XRD) was conducted to measure crystallinity of the laser-modified surface. X-ray diffraction patterns of the samples were recorded using a Bruker D8 XRD system with Cu K α (λ=1.5405 Å) radiation. The diffraction patterns were recorded in the 2θ range of 20 to 80°. The hardness properties were tested at 981 mN force. The laser-modified surface exhibited reduced crystallinity compared to the un-processed samples. The presence of martensitic phase was detected in the samples processed using 0.4 mm spot size. Though there was reduced crystallinity, a high hardness was measured in the laser-modified surface. Hardness was increased more than 2.5 times compared to the as-received samples. These findings reveal the phase source of the hardening mechanism and grain composition in the laser-modified surface.
format	Article
author	S. N., Aqida Brabazon, Dermot S., Naher
author_facet	S. N., Aqida Brabazon, Dermot S., Naher
author_sort	S. N., Aqida
title	An Investigation of Phase Transformation and Crystallinity in Laser Surface Modified H13 Steel
title_short	An Investigation of Phase Transformation and Crystallinity in Laser Surface Modified H13 Steel
title_full	An Investigation of Phase Transformation and Crystallinity in Laser Surface Modified H13 Steel
title_fullStr	An Investigation of Phase Transformation and Crystallinity in Laser Surface Modified H13 Steel
title_full_unstemmed	An Investigation of Phase Transformation and Crystallinity in Laser Surface Modified H13 Steel
title_sort	investigation of phase transformation and crystallinity in laser surface modified h13 steel
publisher	Springer
publishDate	2013
url	http://umpir.ump.edu.my/id/eprint/5858/ http://umpir.ump.edu.my/id/eprint/5858/ http://umpir.ump.edu.my/id/eprint/5858/ http://umpir.ump.edu.my/id/eprint/5858/1/hrini.pdf
first_indexed	2023-09-18T22:01:17Z
last_indexed	2023-09-18T22:01:17Z
_version_	1777414415103033344

An Investigation of Phase Transformation and Crystallinity in Laser Surface Modified H13 Steel

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