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Proceedings Paper

Enhanced microhardness of four modern steels following nitrogen ion implantation
Author(s): Manyuan Li; Emile J. Knystautas; Madhavarao Krishnadev
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Paper Abstract

Samples of four modern steels were implanted with 120 keV N2+ ions at doses ranging from 5 X 1015 to 1.2 X 1017 ions/cm2 at room temperature. The sample surfaces were studied for their tribological properties. The Knoop microhardnesses increased by 9 percent to 30 percent after ion implantation. A heat treatment study from 200 degrees C to 600 degrees C on AerMet 100 and Sverker 21 following implantation with 8 X 1016 ions/cm2 of nitrogen comparing implanted to unimplanted samples shows that the hardness reduction arising for the heat treatment was lower for the implanted samples. The projected ranges for the implanted specimens were obtained using the TRIM program. The microhardness of the implanted layers alone was calculated by the Hoensson-Hogmark model. The residual stress of the Orvar Supreme surface after 60 keV nitrogen ion implantation at a dose of 8 X 1016 ions/cm2 was also measured by x-ray diffraction. The friction and wear test was obtained using an Optimol SRV friction and wear tester. After nitrogen implantation and heat treatment, samples were depth profiled by AES and XPS.

Paper Details

Date Published: 17 September 1998
PDF: 9 pages
Proc. SPIE 3413, Materials Modification by Ion Irradiation, (17 September 1998); doi: 10.1117/12.321951
Show Author Affiliations
Manyuan Li, Univ. Laval (Canada)
Emile J. Knystautas, Univ. Laval (Canada)
Madhavarao Krishnadev, Univ. Laval (Canada)

Published in SPIE Proceedings Vol. 3413:
Materials Modification by Ion Irradiation
Emile J. Knystautas, Editor(s)

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