Microstructure of perfect nitrogen-expanded austenite formed by unconstrained nitriding

2021 ◽  
Vol 194 ◽  
pp. 113705
Author(s):  
H.L. Che ◽  
M.K. Lei
Keyword(s):  
Expanded Austenite

scholarly journals Study of expanded austenite formed in plasma nitrided AISI 316L samples, using synchrotron radiation diffraction

2014 ◽  
Vol 17 (5) ◽  
pp. 1302-1308 ◽  
Author(s):  
Marcelo Campos ◽  
Sylvio Dionysio de Souza ◽  
Luis Gallego Martinez ◽  
Maristela Olzon-Dionysio
Keyword(s):  
Synchrotron Radiation ◽  
Aisi 316L ◽  
Synchrotron Radiation Diffraction ◽  
Expanded Austenite

X-ray diffraction characterisation of expanded austenite and ferrite in plasma nitrided stainless steels

2010 ◽  
Vol 26 (4) ◽  
pp. 265-270 ◽  
Author(s):  
L. C. Gontijo ◽  
R. Machado ◽  
L. C. Casteletti ◽  
S. E. Kuri ◽  
P. A. P. Nascente
Keyword(s):  
Stainless Steels ◽  
X Ray Diffraction ◽  
X Ray ◽  
Expanded Austenite

The Influence of Stress on Interstitial Diffusion - Carbon Diffusion Data in Austenite Revisited

2010 ◽  
Vol 297-301 ◽  
pp. 1408-1413 ◽  
Author(s):  
Thomas L. Christiansen ◽  
Marcel A.J. Somers
Keyword(s):  
High Temperatures ◽  
Carbon Diffusion ◽  
Interstitial Diffusion ◽  
Diffusion Data ◽  
Induced Stress ◽  
Induced Stresses ◽  
Expanded Austenite

The present paper addresses the influence of chemical induced stresses on diffusion in interstitial systems. This is exemplified by simulations of carbon diffusion in austenite at high temperatures and it is shown that old well established literature data is flawed by the occurrence of composition induced stress. For the technological relevant system of expanded austenite the diffusion can be dramatically affected by composition induced stress.

scholarly journals Gradient Elastic–Plastic Properties of Expanded Austenite Layer in 316L Stainless Steel

2018 ◽  
Vol 31 (8) ◽  
pp. 831-841 ◽  
Author(s):  
Yong Jiang ◽  
Yang Li ◽  
Yun-Fei Jia ◽  
Xian-Cheng Zhang ◽  
Jian-Ming Gong
Keyword(s):  
Stainless Steel ◽  
316L Stainless Steel ◽  
Plastic Properties ◽  
Elastic Plastic ◽  
Expanded Austenite

Microstructural Characterization of the expanded austenite formed on the plasma nitrided AISI 316 L steel

2013 ◽  
Vol 101 (2) ◽  
pp. 204 ◽  
Author(s):  
M. Keddam ◽  
G. Marcos ◽  
T. Thiriet ◽  
T. Czerwiec ◽  
H. Michel
Keyword(s):  
Microstructural Characterization ◽  
Expanded Austenite ◽  
Aisi 316 ◽  
Aisi 316 L

scholarly journals Measurement and tailoring of residual stress in expanded austenite on austenitic stainless steel

2017 ◽  
Vol 701 ◽  
pp. 167-173 ◽  
Author(s):  
Frederico A.P. Fernandes ◽  
Thomas L. Christiansen ◽  
Grethe Winther ◽  
Marcel A.J. Somers
Keyword(s):  
Residual Stress ◽  
Stainless Steel ◽  
Austenitic Stainless Steel ◽  
Expanded Austenite

Microstructural Changes Induced during Hydrogen Charging Process in Stainless Steels with and without Nitrided Layers

2012 ◽  
Vol 186 ◽  
pp. 305-310 ◽  
Author(s):  
Bartosz Gołębiowski ◽  
Wiesław Świątnicki
Keyword(s):  
Hydrogen Embrittlement ◽  
Glow Discharge ◽  
Stainless Steels ◽  
Structural Changes ◽  
High Stress ◽  
High Concentration ◽  
Two Phase ◽  
Microstructural Changes ◽  
Hydrogen Charging ◽  
Expanded Austenite

The purpose of this study is to analyze the effect of glow discharge nitriding on hydrogen degradation of two types of steels: two-phase austenitic-ferritic and single-phase austenitic. The nitriding process resulted in formation of surface layers composed of expanded austenite (S phase), and in the case of two-phase steel of expanded austenite and expanded ferrite. Microstructural changes occurring under the influence of hydrogen on steels without and with nitrided layers were investigated with the use of scanning (SEM) and transmission (TEM) electron microscopy techniques. It was shown that the density of cracks formed during cathodic hydrogen charging is higher on the surface of the non-nitrided steels compared to the nitrided steels after identical hydrogen charging process. Moreover in non nitrided steel hydrogenation leads to considerable increase of dislocation density, which results from the high concentration of hydrogen absorbed to the steel during its cathodic charging. This leads in turn to high stress concentration and local embrittlement giving rise to cracks formation. Conversely nitriding reduces the absorption of hydrogen and prevents structural changes resulting in hydrogen embrittlement. The conducted studies show that glow discharge nitriding can be used to increase resistance to hydrogen embrittlement of austenitic and austenitic ferritic stainless steels.

scholarly journals Experimental and numerical analysis of residual stress in carbon-stabilized expanded austenite

2018 ◽  
Vol 157 ◽  
pp. 106-109 ◽  
Author(s):  
Yawei Peng ◽  
Zhe Liu ◽  
Yong Jiang ◽  
Bo Wang ◽  
Jianming Gong ◽  
...  
Keyword(s):  
Residual Stress ◽  
Numerical Analysis ◽  
Expanded Austenite
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