A layer growth mechanism proposed on studies on a gas nitrided AISI 316 L austenitic stainless steel | Zendy

Kliauga Andréa Madeira | Zendy

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A layer growth mechanism proposed on studies on a gas nitrided AISI 316 L austenitic stainless steel

Author(s) -

Kliauga Andréa Madeira

Publication year - 1998

Publication title -

steel research

Language(s) - English

Resource type - Journals

eISSN - 1869-344X

pISSN - 0177-4832

DOI - 10.1002/srin.199801457

Subject(s) - nitriding , metallurgy , nitride , austenite , chromium , austenitic stainless steel , materials science , layer (electronics) , lamellar structure , chromium nitride , nickel , chemistry , composite material , microstructure , corrosion

In this work an austenitic stainless steel AISI 316 L (1.4404) was gas nitrided at 540°C. The nitride layer was characterised by means of X‐ray analysis, SEM, TEM and electron probe X‐ray analysis. A fine lamellar structure comprising ∊ and γ' nitrides was formed. Nickel paritioned into γ'‐Fe 4 N type nitride while chromium partitioned into the ∊‐Fe 2–3 N type nitride. A layer formation mechanism was proposed considering a local partition of the alloying elements Cr and Ni.

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