Influence of crystal orientation and ion bombardment on the nitrogen diffusivity in single-crystalline austenitic stainless steel

Journal Article · Sat Oct 01 00:00:00 EDT 2011 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.3646493· OSTI ID:22036742

Martinavicius, A; Abrasonis, G; Moeller, W ^[1]

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1. Institute of Ion Beam Physics and Materials Research, Helmholtz-Zentrum Dresden-Rossendorf (HZDR), P.O. Box 510119, Dresden 01314 (Germany)

The nitrogen diffusivity in single-crystalline AISI 316L austenitic stainless steel (ASS) during ion nitriding has been investigated at different crystal orientations ((001), (110), (111)) under variations of ion flux (0.3-0.7 mA cm{sup -2}), ion energy (0.5-1.2 keV), and temperature (370-430 deg. C). The nitrogen depth profiles obtained from nuclear reaction analysis are in excellent agreement with fits using the model of diffusion under the influence of traps, from which diffusion coefficients were extracted. At fixed ion energy and flux, the diffusivity varies by a factor up to 2.5 at different crystal orientations. At (100) orientation, it increases linearly with increasing ion flux or energy. The findings are discussed on the basis of atomistic mechanisms of interstitial diffusion, potential lattice distortions, local decomposition, and ion-induced lattice vibrational excitations.

• OSTI ID: 22036742
• Journal Information: Journal of Applied Physics, Vol. 110, Issue 7; Other Information: (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
36 MATERIALS SCIENCE
DECOMPOSITION
DIFFUSION
EXCITATION
INTERSTITIALS
ION BEAMS
KEV RANGE
LATTICE VIBRATIONS
MONOCRYSTALS
NITRIDATION
NITROGEN IONS
NUCLEAR REACTION ANALYSIS
POTENTIALS
STAINLESS STEEL-316L
SURFACE HARDENING
TEMPERATURE DEPENDENCE
TRAPS