scholarly journals Austenitic stainless steel strengthened by the in situ formation of oxide nanoinclusions

RSC Advances ◽  
2015 ◽  
Vol 5 (27) ◽  
pp. 20747-20750 ◽  
Author(s):  
Kamran Saeidi ◽  
Lenka Kvetková ◽  
František Lofaj ◽  
Zhijian Shen
Keyword(s):  
Electron Microscopy ◽  
Stainless Steel ◽  
Austenitic Stainless Steel ◽  
Energy Dispersive Spectrometry ◽  
Steel Matrix ◽  
Laser Melting ◽  
Transmission Electron ◽  
In Situ Formation ◽  
Average Size

Austenitic stainless steel was prepared by laser melting. High resolution transmission electron microscopy with energy dispersive spectrometry confirmed homogeneous dispersion of the in situ formed oxide nanoinclusions with average size less than 50 nm in the steel matrix.

Interface Structure in Ferritic/Austenitic Stainless Steel Bicrystals

2000 ◽  
Vol 652 ◽  
Author(s):  
Aude Taisne ◽  
Brigitte Décamps ◽  
Louisette Priester
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Stainless Steel ◽  
Austenitic Stainless Steel ◽  
Stainless Steels ◽  
Interface Structure ◽  
Duplex Stainless Steels ◽  
Interphase Interface ◽  
Transmission Electron ◽  
Mechanisms Of Deformation

ABSTRACTElementary mechanisms of deformation by fatigue in duplex stainless steels bicrystals are studied by transmission electron microscopy (TEM). An attempt is made to correlate the bicrystal macroscopic behaviour with the interphase interface crystallography.

High-density stacking faults in a supersaturated nitrided layer on austenitic stainless steel

2016 ◽  
Vol 49 (6) ◽  
pp. 1967-1971 ◽  
Author(s):  
Ke Tong ◽  
Fei Ye ◽  
Honglong Che ◽  
Ming Kai Lei ◽  
Shu Miao ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Stainless Steel ◽  
Austenitic Stainless Steel ◽  
Nitrided Layer ◽  
Stacking Faults ◽  
High Density ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron

The nitrogen-supersaturated phase produced by low-temperature plasma-assisted nitriding of austenitic stainless steel usually contains a high density of stacking faults. However, the stacking fault density observed in previous studies was considerably lower than that determined by fitting the X-ray diffraction pattern. In this work, it has been confirmed by high-resolution transmission electron microscopy that the strip-shaped regions of about 3–25 nm in width observed at relatively low magnification essentially consist of a series of stacking faults on every second {111} atomic plane. A microstructure model of the clustered stacking faults embedded in a face-centred cubic structure was built for these regions. The simulated X-ray diffraction and transmission electron microscopy results based on this model are consistent with the observations.

On the crystal structure of Cr2N precipitates in high-nitrogen austenitic stainless steel

2005 ◽  
Vol 61 (2) ◽  
pp. 137-144 ◽  
Author(s):  
Tae-Ho Lee ◽  
Chang-Seok Oh ◽  
Heung Nam Han ◽  
Chang Gil Lee ◽  
Sung-Joon Kim ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Stainless Steel ◽  
Austenitic Stainless Steel ◽  
Present Model ◽  
Probability Function ◽  
High Nitrogen ◽  
Transmission Electron ◽  
Static Concentration

The crystal structure of Cr2N precipitates in high-nitrogen austenitic stainless steel was investigated by transmission electron microscopy (TEM). Based on the analyses of selected area diffraction (SAD) patterns, the crystal structure of Cr2N was confirmed to be trigonal (P\bar 31m) and was characterized by three sets of superlattice reflections: (001), (1\over 31\over 30) and (1\over 31\over 31). These could be explained in terms of the ∊-type occupational ordering of nitrogen. The static concentration waves (SCWs) method was applied to describe the ordered superstructure of Cr2N. The occupation probability function (OPF) for describing the distribution of N atoms in the Cr2N superstructure was derived based on the superlattice reflections obtained in the SAD patterns and could be expressed as: n({\bf r})=c-\textstyle{1\over 6}\eta_1\cos 2\pi z+{4\over 3}\eta_3\cos (2\pi/3)(x+y+3z). The crystallographic models for ∊-type ordering, mainly suggested in the Fe–N system, were discussed in comparison to the present model.

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