Results 211 to 220 of about 4,525 (236)
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Decomposition kinetics of expanded austenite with high nitrogen contents
International Journal of Materials Research, 2006Abstract This paper addresses the decomposition kinetics of synthesized homogeneous expanded austenite formed by gaseous nitriding of stainless steel AISI 304L and AISI 316L with nitrogen contents up to 38 at.% nitrogen. Isochronal annealing experiments were carried out in both inert (N2) and reducing (H2) atmospheres.
Thomas Christiansen, Marcel A. J. Somers
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Key Engineering Materials, 2008
The effect of thermal annealing temperature on the microstructure and phase composition of nitrided layer formed on AISI 304 stainless steel by plasma nitriding were investigated. The phase composition and structure of the nitrided have been analyzed by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The XRD analysis of nitrided samples
Liang Wang, Yang Li, Yi Zuo Wang
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The effect of thermal annealing temperature on the microstructure and phase composition of nitrided layer formed on AISI 304 stainless steel by plasma nitriding were investigated. The phase composition and structure of the nitrided have been analyzed by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The XRD analysis of nitrided samples
Liang Wang, Yang Li, Yi Zuo Wang
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Materials Today: Proceedings, 2020
Abstract Austenitic stainless-steel grade AISI310 are utilized in various applications like heaters, house apparatuses, turbine parts, blower parts. This task researches on the wear conduct of AISI 310 steel treated with gas nitriding treated to various time parameters to 6 h, 12 h and 18 h respectively. Wear test is led by utilizing pin on disc wear
T. Lakshmi Deepak +4 more
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Abstract Austenitic stainless-steel grade AISI310 are utilized in various applications like heaters, house apparatuses, turbine parts, blower parts. This task researches on the wear conduct of AISI 310 steel treated with gas nitriding treated to various time parameters to 6 h, 12 h and 18 h respectively. Wear test is led by utilizing pin on disc wear
T. Lakshmi Deepak +4 more
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Surface and Coatings Technology, 2006
Plasma nitriding of an AISI 316L austenitic stainless steel at low (400 °C) and high temperatures (550 °C) was performed under different nitriding gas mixtures. Nitrided surfaces were characterized by XRD using the Rietveld method. Expanded austenite “γN” with a special triclinic (t) crystalline structure was formed during the low-temperature nitriding
N. Mingolo +2 more
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Plasma nitriding of an AISI 316L austenitic stainless steel at low (400 °C) and high temperatures (550 °C) was performed under different nitriding gas mixtures. Nitrided surfaces were characterized by XRD using the Rietveld method. Expanded austenite “γN” with a special triclinic (t) crystalline structure was formed during the low-temperature nitriding
N. Mingolo +2 more
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Nitrogen Diffusion and Stresses during Expanded Austenite Formation in Nitriding
Defect and Diffusion Forum, 2017Low-temperature nitriding of austenitic stainless steels or chromium containing alloys can produce expanded austenite, known as S-phase, with combined improvement in wear and corrosion resistance. In the paper a critical review of various models for nitrogen diffusion during nitriding is presented.
Katarzyna Tkacz-Śmiech +3 more
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Determination of Concentration Dependent Diffusion Coefficients of Carbon in Expanded Austenite
Defect and Diffusion Forum, 2008In the present paper various experimental procedures to experimentally determine the concentration dependent diffusion coefficient of carbon in expanded austenite are evaluated. To this end thermogravimetric carburization was simulated for various experimental conditions and the evaluated composition dependent diffusivity of carbon derived from the ...
Thomas S. Hummelshøj +2 more
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Microstructure of expanded austenite in ion-nitrided AISI 316L single crystals
Surface and Coatings Technology, 2007Single crystalline AISI 316L austenitic stainless steel (ASS) samples of different orientations (001), (110), (310) were implanted at 400 °C with 1.2 keV nitrogen ions using a high current density of 0.5 mAcm -2 . Quantitative nitrogen distribution profiles were determined using nuclear reaction analysis (NRA), while the structure of the nitrided layer
Riviere, J. P. +5 more
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Stress and Composition of Carbon Stabilized Expanded Austenite on Stainless Steel
Metallurgical and Materials Transactions A, 2008Low-temperature gaseous carburizing of stainless steel is associated with a colossal supersaturation of the fcc lattice with carbon, without the development of carbides. This article addresses the simultaneous determination of stress and composition profiles in layers of carbon expanded austenite obtained by low-temperature gaseous carburizing of AISI ...
Thomas L. Christiansen +1 more
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Determination of the concentration dependent diffusion coefficient of nitrogen in expanded austenite
International Journal of Materials Research, 2008AbstractThe concentration dependent diffusion coefficient of nitrogen in expanded austenite was determined from the rate of retracting nitrogen from thin initially N-saturated coupons. Nitrogen saturated homogeneous foils of expanded austenite were obtained by nitriding AISI 304 and AISI 316 in pure ammonia at 693 K and 718 K.
Thomas L. Christiansen +1 more
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Journal of Applied Physics, 2002
Expanded austenite, formed after nitrogen plasma immersion ion implantation or low energy nitriding of austenitic stainless, is characterized by a high nitrogen content CN of up to 20 at. % and an unusual fast diffusion, which in general cannot be described using a single diffusion coefficient.
S. Mändl, B. Rauschenbach
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Expanded austenite, formed after nitrogen plasma immersion ion implantation or low energy nitriding of austenitic stainless, is characterized by a high nitrogen content CN of up to 20 at. % and an unusual fast diffusion, which in general cannot be described using a single diffusion coefficient.
S. Mändl, B. Rauschenbach
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