Results 191 to 200 of about 1,053 (210)
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Nitrogen and carbon expanded austenite produced by PI3
Surface and Coatings Technology, 2001Expanded austenite can be formed either by nitrogen or carbon plasma immersion ion implantation (PI3 (TM)) from a nitrogen or methane plasma at elevated temperatures. The structure and properties of nitrogen and carbon expanded austenite layers produced on austenitic stainless steel X5CrNi189 are compared.
C Blawert, B L Mordike, G A Collins
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The nature of expanded austenite
Surface and Coatings Technology, 2000This paper attempts to reduce some of the confusion that exists over the nature of the nitrogen-rich layer produced by nitriding austenitic stainless steel at temperatures below 500 degreesC. Cross-sectional transmission electron microscopy shows that the modified layer is dominated by a cubic phase with considerable expansion of the austenite lattice.
Fewell, MP +4 more
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Nitrogen diffusivity in expanded austenite
Surface and Coatings Technology, 2003Abstract Expanded austenite is a metastable phase formed after nitrogen insertion into austenitic stainless steel, at elevated temperatures between 350 and 400 °C with nitrogen contents between 5 and 30 at.%, thus leading to a lattice expansion of up to 13%.
S. Mändl +3 more
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Residual stress and cracking in expanded austenite layers
Journal of Physics: Condensed Matter, 2005The residual stress state and mechanical properties of an expanded austenite layer produced by plasma immersion ion implantation (PI3) on type 316 austenitic stainless steel substrates at different temperatures were investigated. Residual stress data were obtained using the substrate curvature technique for six different treatment temperatures in the ...
D Hoeft, B A Latella, K T Short
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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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Isotope exchange investigation of nitrogen redistribution in expanded austenite
Scripta Materialia, 2013Sequential plasma and gaseous nitriding of Fe–18Cr–10Ni–3Mo stainless steel at 390 °C with 14N and 15N isotopes followed by denitriding in flowing hydrogen was investigated. Redistribution of plasma-inserted nitrogen atoms (15N) by subsequent gaseous nitriding (14N) was observed.
Christiansen, T. L. +3 more
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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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High-order diffractometry of expanded austenite using synchrotron radiation
Surface and Coatings Technology, 2008There has been much interest in the crystallographic nature of expanded austenite, the nitrogen-rich phase formed in the nitriding of an austenitic stainless steel at relatively low temperature, with previous work leading to a variety of descriptions. This paper reports tests of a total of 10 plausible candidate structures by recording diffractograms ...
M.P. Fewell, J.M. Priest
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Effects of Grain Size on the Fatigue Properties in Cold-Expanded Austenitic HNSs
Metals and Materials International, 2018Cold-expanded austenitic high nitrogen steel (HNS) was subjected to investigate the effects of grain size on the stress-controlled high cycle fatigue (HCF) as well as the strain-controlled low cycle fatigue (LCF) properties. The austenitic HNSs with two different grain sizes (160 and 292 μm) were fabricated by the different hot forging strain. The fine-
Jong-Ho Shin +2 more
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