scholarly journals Transmission Electron Microscopy in the Heat Affected Zone of an AISI 304 Austenitic Stainless Steel Welded with the Application of a Magnetic Field of Low Intensity

2013 ◽  
Vol 54 (1) ◽  
pp. 122-125 ◽  
Author(s):  
Francisco F. Curiel ◽  
Rafael García ◽  
Victor H. López ◽  
Marco A. García ◽  
José Lemus
Keyword(s):  
Magnetic Field ◽  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Stainless Steel ◽  
Austenitic Stainless Steel ◽  
Heat Affected Zone ◽  
Aisi 304 ◽  
Low Intensity ◽  
Transmission Electron ◽  
304 Austenitic Stainless Steel

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.

Microstructure Evolution of a Metastable CrMnN Austenitic Stainless Steel during Compression Deformation

2010 ◽  
Vol 146-147 ◽  
pp. 26-33 ◽  
Author(s):  
Ming Zhou Xu ◽  
Jian Jun Wang ◽  
Li Jun Wang ◽  
Wen Fang Cui ◽  
Chun Ming Liu
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Stainless Steel ◽  
Phase Transformation ◽  
Austenitic Stainless Steel ◽  
Deformation Twin ◽  
X Ray Diffraction ◽  
X Ray ◽  
Compression Deformation ◽  
Transmission Electron

Microstructural evolution of a metastable 18Cr12Mn0.55N austenitic stainless steel during compression deformation was investigated by transmission electron microscopy (TEM) and X-ray diffraction (XRD). TEM observation showed the occurrence of deformation-induced phase transformation and atypical deformation twin, the deformation-induced phase cannot be identified as austenite or martensite. XRD test showed that the amount of deformation-induced phase is less than the detectable limit of XRD.

Precipitation and Recrystallization Behaviors of a High-Nitrogen Austenitic Stainless Steel Aging at 90°C

2010 ◽  
Vol 146-147 ◽  
pp. 189-193
Author(s):  
Feng Shi ◽  
Yang Qi ◽  
Ming Zhou Xu ◽  
Chun Ming Liu
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Stainless Steel ◽  
Austenitic Stainless Steel ◽  
Grain Boundary ◽  
Optical Microscopy ◽  
Cold Work ◽  
High Nitrogen ◽  
Recrystallization Nucleus ◽  
Transmission Electron

The behaviors of precipitation and recrystallization aging at 900 after cold work in a Fe-18Cr-12Mn-0.48N high-nitrogen austenitic stainless steel were investigated by means of optical microscopy (OM) and transmission electron microscopy (TEM). The results show that precipitation and recrystallization occur simultaneously after aging at 900 for 10min. The precipitates firstly appear at dislocation, sub-boundary and inside the subgrain. Precipitation at these positions hinders the formation of recrystallization nucleus. With aging time increasing, precipitates appear in the recrystallized grain boundary and inside the grain. Precipitation at these positions hinders the growth of the recrystalized grains.

scholarly journals Use of Direct Current Resistivity Measurements to Assess AISI 304 Austenitic Stainless Steel Sensitization

2015 ◽  
Vol 18 (2) ◽  
pp. 341-346 ◽  
Author(s):  
Ramaiany Carneiro Mesquita ◽  
José Manoel Rivas Mecury ◽  
Auro Atsumi Tanaka ◽  
Regina Célia de Sousa
Keyword(s):  
Stainless Steel ◽  
Austenitic Stainless Steel ◽  
Direct Current ◽  
Aisi 304 ◽  
Resistivity Measurements ◽  
304 Austenitic Stainless Steel
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