Interstitial Hardening of Type 316L Stainless Steel to Improve Corrosion Resistance and Mechanical Properties

A low-temperature (450°C to 500°C), gas-phase interstitial hardening (IH) process that introduces substantial amounts of carbon, without carbide formation, into austenitic stainless steels was investigated. This process provides surface carbon concentration as high as 14 at% and improves the surface...

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Bibliographic Details
Published in:Corrosion (Houston, Tex.) Tex.), 2012-07, Vol.68 (7), p.638-644
Main Authors: NATISHAN, P. M, BAYLES, R. A, RAYNE, R, LONGAZEL, T, MARTIN, F. J, KAHN, H, HEUER, A. H
Format: Article
Language:English
Subjects:
Applied sciences
Austenitic stainless steels
Carbon
Corrosion
Corrosion environments
Corrosion fatigue
Corrosion potential
Corrosion rate
Corrosion resistance
Corrosion resistant steels
Crevice corrosion
Discount coupons
Electrodes
Ethanol
Exact sciences and technology
Experiments
Fasteners
Fatigue
Galling
Hardening
Heat resistant steels
Impact tests
Interstitials
Laboratories
Load
Low temperature
Low temperature resistance
Martensite
Mechanical properties
Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology
Metal fatigue
Metals. Metallurgy
Performance evaluation
Seawater
Stainless steel
Stainless steels
Steel alloys
Surface properties
Water hardness
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Summary:A low-temperature (450°C to 500°C), gas-phase interstitial hardening (IH) process that introduces substantial amounts of carbon, without carbide formation, into austenitic stainless steels was investigated. This process provides surface carbon concentration as high as 14 at% and improves the surface properties of treated Type 316L (UNS S31603) austenitic stainless steel. Specifically, it showed that IH treatment of Type 316L stainless steel increased the crevice corrosion initiation potential, hardness, fatigue, and galling resistance compared to untreated Type 316L stainless steel. The present work has also shown that the threads of fastener areas are susceptible to corrosion attack and is likely related to retained martensite on the fasteners.
ISSN:0010-9312
1938-159X
DOI:10.5006/0599