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Metals 2017, 7(7), 246; doi:10.3390/met7070246

Analysis of Relaxation Processes in HNS Due to Interstitial-Substitutional Pairs

Department of Industrial Engineering, University of Rome “Tor Vergata”, Via del Politecnico 1, 00133 Rome, Italy
Author to whom correspondence should be addressed.
Received: 8 June 2017 / Revised: 28 June 2017 / Accepted: 29 June 2017 / Published: 2 July 2017
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Mechanical Spectroscopy (MS) tests have been performed on a high nitrogen (0.8 wt %) austenitic steel (HNS) with resonance frequencies in the range of kHz. Two sets of samples have been examined: the first set in an as-prepared condition, the second one submitted to a heat treatment of 2 h at 800 °C, which induces a discontinuous precipitation of Cr2N phase. In both sets, the damping spectrum shows a broad peak whose position and shape is changed by the precipitation of Cr2N phase. The results are explained by considering interstitial-substitutional (i-s) interactions.
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Keywords: HNS; Cr2N; damping; dynamic modulus; interstitial-substitutional interactions HNS; Cr2N; damping; dynamic modulus; interstitial-substitutional interactions

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Fava, A.; Montanari, R.; Richetta, M.; Varone, A. Analysis of Relaxation Processes in HNS Due to Interstitial-Substitutional Pairs. Metals 2017, 7, 246.

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