Enhanced microhardness of four modern steels following nitrogen ion implantation

Manyuan Li; Emile J. Knystautas; Madhavarao Krishnadev

doi:10.1117/12.321951

17 September 1998 Enhanced microhardness of four modern steels following nitrogen ion implantation

Manyuan Li, Emile J. Knystautas, Madhavarao Krishnadev

Proceedings Volume 3413, Materials Modification by Ion Irradiation; (1998) https://doi.org/10.1117/12.321951
Event: Lasers and Materials in Industry and Opto-Contact Workshop, 1998, Quebec, Canada

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.

Citation Download Citation

Manyuan Li, Emile J. Knystautas, and Madhavarao Krishnadev "Enhanced microhardness of four modern steels following nitrogen ion implantation", Proc. SPIE 3413, Materials Modification by Ion Irradiation, (17 September 1998); https://doi.org/10.1117/12.321951

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