Automated Gaseous Nitriding Controlled by Nitriding Potential

2018 ◽  
Author(s):  
Keyword(s):  
Gaseous Nitriding ◽  
Nitriding Potential

scholarly journals Growth kinetics of the compound layers: Effect of the nitriding potential

2009 ◽  
Vol 2 (3) ◽  
pp. 1399-1403 ◽  
Author(s):  
M. Keddam ◽  
B. Bouarour ◽  
R. Kouba ◽  
R. Chegroune
Keyword(s):  
Growth Kinetics ◽  
Nitriding Potential ◽  
Kinetics Of

Unusual Microstructural Development upon Gaseous Nitriding of Fe-4.65at% Al Alloy

2010 ◽  
Vol 89-91 ◽  
pp. 371-376
Author(s):  
S. Meka ◽  
R.E. Schacherl ◽  
E. Bischoff ◽  
Eric J. Mittemeijer
Keyword(s):  
Electron Backscatter Diffraction ◽  
Ferrite Matrix ◽  
Microstructural Development ◽  
Al Alloy ◽  
X Ray Diffraction ◽  
Gaseous Nitriding ◽  
Backscatter Diffraction ◽  
Micro Analysis ◽  
Very High ◽  
Plate Type

Employing NH3/H2 gas mixtures, Fe-4.65at% Al alloy specimens were nitrided to assess how the presence of Al, originally dissolved in the ferrite matrix, influences the development of γ-Fe4N1-x phase in the surface adjacent region. The nitrided specimens were characterized by light microscopy, X-ray diffraction, Electron Backscatter Diffraction and Electron Probe Micro Analysis. Surprisingly, formation of ε-Fe2N1-x was observed, although, for the applied nitriding parameters (nitriding potential and temperature), only the formation of γ-Fe4N1-x would be expected in case of nitriding pure ferrite. An unusual plate-type morphology of γ-Fe4N1-x was observed, contrasting with the usual continuous layer-type growth observed upon nitriding iron, Fe-Cr and Fe-V alloys. These unexpected phenomena may be explained as consequences of the need to realize a very high nitrogen supersaturation in the ferrite matrix in order to initiate the precipitation of AlN.

Anisotropy effects on gaseous nitriding of austenitic stainless steel single crystals

2020 ◽  
Vol 194 ◽  
pp. 168-177 ◽  
Author(s):  
Ömer C. Kücükyildiz ◽  
Flemming B. Grumsen ◽  
Thomas L. Christiansen ◽  
Grethe Winther ◽  
Marcel A.J. Somers
Keyword(s):  
Stainless Steel ◽  
Austenitic Stainless Steel ◽  
Single Crystals ◽  
Gaseous Nitriding

S91 Phase Transformation Involving Residual Stresses During Gaseous Nitriding of Steel

2008 ◽  
Vol 23 (2) ◽  
pp. 190-190
Author(s):  
S. Jegou ◽  
R. Kubler ◽  
L. Barrallier ◽  
F. Roch
Keyword(s):  
Phase Transformation ◽  
Residual Stresses ◽  
Gaseous Nitriding
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