Lattice rotation induced by plasma nitriding in a 316L polycrystalline stainless steel

Stinville, J.C.; Villechaise, Patrick; Templier, C.; Rivière, J.P.; Drouet, M.

doi:10.1016/j.actamat.2010.01.002

Cited by 73 publications

(47 citation statements)

References 35 publications

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“…Experimentally, it has been demonstrated from lattice rotations and associated texture changes in expanded austenite as well as from enhanced surface roughness by grain push-out, that, at least part of the composition-induced stress is accommodated plastically during nitriding [18,19,20,21]. Biaxial compressive stress levels of several GPa's, as observed experimentally, clearly exceed by far the yield stress of austenitic stainless steel.…”

mentioning

confidence: 79%

Modelling the evolution of composition-and stress-depth profiles in austenitic stainless steels during low-temperature nitriding

Jespersen¹,

Hattel²,

Somers³

2016

Modelling Simul. Mater. Sci. Eng.

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Nitriding of stainless steel causes a surface zone of expanded austenite, which improves the wear resistance of the stainless steel while preserving the stainless behavior. During nitriding huge residual stresses are introduced in the treated zone, arising from the volume expansion that accompanies the dissolution of high nitrogen contents in expanded austenite.An intriguing phenomenon during low-temperature nitriding is that the residual stresses evoked by dissolution of nitrogen in the solid state, affect the thermodynamics and the diffusion kinetics of nitrogen dissolution. In the present paper solid mechanics was combined with thermodynamics and diffusion kinetics to simulate the evolution of composition-depth and stress-depth profiles resulting from nitriding. The model takes into account a composition-dependent diffusion coefficient of nitrogen in expanded austenite, short range ordering (trapping) of nitrogen atoms by chromium atoms, and the effect of composition-induced stress on surface concentration and diffusive flux. The effect of plasticity and concentrationdependence of the yield stress was also included.

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mentioning

confidence: 79%

Modelling the evolution of composition-and stress-depth profiles in austenitic stainless steels during low-temperature nitriding

Jespersen¹,

Hattel²,

Somers³

2016

Modelling Simul. Mater. Sci. Eng.

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“…These results suggest a preferential (200) orientation of γ N grains parallel to the surface with increasing nitriding times. A recent plasma nitriding study [21] of an austenitic SS (316L) for very long times at 400°C reported the change of the crystallographic orientation due to nitriding, and attributed the orientation change (i.e., texture evolution) to high compressive residual stresses in the nitrided layer that developed as a consequence of large lattice expansions (~9%) in the fcc substrate matrix. As is quantifed below, the lattice expansions observed in the nitrided CoCrMo alloy in this work is~10%.…”

Section: Shown Inmentioning

confidence: 99%

Magnetic layer formation on plasma nitrided CoCrMo alloy

Öztürk¹,

Okur²,

Pichon³

et al. 2011

Surface and Coatings Technology

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“…This is expected since the edges of the patterns can pin the domain walls making the magnetization reversal by domain wall movement more difficult. 31 Furthermore, the change in the crystallographic orientation due to nitriding, 32 clearly observed in Fig. 3͑d͒, renders a even more complicated interplay between the domain walls and these edges.…”

Section: -mentioning

confidence: 99%

Out-of-plane magnetic patterning on austenitic stainless steels using plasma nitriding

Menéndez

Stinville

Tromas

et al. 2010

Applied Physics Letters

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A correlation between the grain orientation and the out-of-plane magnetic properties of nitrogen-enriched polycrystalline austenitic stainless steel surface is performed. Due to the competition between the magnetocrystalline anisotropy, the exchange and dipolar interactions, and the residual stresses induced by nitriding, the resulting effective magnetic easy-axis can lay along unusual directions. It is also demonstrated that, by choosing an appropriate stainless steel texturing, arrays of ferromagnetic structures with out-of-plane magnetization, embedded in a paramagnetic matrix, can be produced by local plasma nitriding through shadow masks.

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Lattice rotation induced by plasma nitriding in a 316L polycrystalline stainless steel

Cited by 73 publications

References 35 publications

Modelling the evolution of composition-and stress-depth profiles in austenitic stainless steels during low-temperature nitriding

Modelling the evolution of composition-and stress-depth profiles in austenitic stainless steels during low-temperature nitriding

Magnetic layer formation on plasma nitrided CoCrMo alloy

Out-of-plane magnetic patterning on austenitic stainless steels using plasma nitriding

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