scholarly journals Microstructure and Microhardness of ZrO2 Reinforced PM 316L Austenitic Stainless Steel Composites Sintered in Ambient and Argon Atmosphere

2019 ◽  
Vol 8 (6) ◽  
pp. 38-42
Keyword(s):  
Stainless Steel ◽  
Electron Microscope ◽  
Austenitic Stainless Steel ◽  
Testing Machine ◽  
Argon Atmosphere ◽  
Steel Matrix ◽  
Matrix Composites ◽  
Hardness Testing ◽  
316L Austenitic Stainless Steel ◽  
Scanning Electron

The present study examines the microstructure and microhardness of zirconia (ZrO2) reinforced PM 316L austenitic stainless steel matrix composites. ZrO2 was added in a proportion of 1 wt% to 3 wt%. Powders were compacted into a disc of 11mm diameter and 2mm thick at 70kN. Compacts were sintered in an ambient and argon atmosphere at 1250oC for 30 minutes. Sintered compacts were then analyzed for microhardness using Vickers hardness testing machine, and microstructure was examined using a scanning electron microscope. The study revealed that the reinforcement of ZrO2 significantly enhanced the microhardness of PM 316L SS matrix composites with a microstructure consisting of irregular porosity and zirconia encapsulating the 316L SS particles.

Effect of Ce on Microstructure and Mechanical Properties of 21Cr-11Ni Austenitic Stainless Steel

2013 ◽  
Vol 711 ◽  
pp. 95-98
Author(s):  
Xiao Liu ◽  
Jing Long Liang
Keyword(s):  
Mechanical Properties ◽  
Stainless Steel ◽  
Electron Microscope ◽  
Austenitic Stainless Steel ◽  
Scanning Electron Microscope ◽  
Tensile Test ◽  
Stainless Steels ◽  
Austenitic Stainless Steels ◽  
Metallographic Examination ◽  
Scanning Electron

The effect of Ce on structure and mechanical properties of 21Cr11Ni austenitic stainless steels were studied by metallographic examination, scanning electron microscope (SEM), tensile test. The results show that the proper amount of Ce can refine microstructure of austenitic stainless steel. Fracture is changed from cleavage to ductile fracture by adding Ce to austenitic stainless steel. 21Cr11Ni stainless steel containing 0.05% Ce can improve its high temerature strength, and the strength is increased 21.81% at 1073K respectively comparing with that of 21Cr11Ni stainless steel without Ce.

Recrystallisation Characteristics of Cold Rolled Austenitic Stainless Steel during Repeated Annealing

2013 ◽  
Vol 753 ◽  
pp. 157-162 ◽  
Author(s):  
B. Ravi Kumar ◽  
Sailaja Sharma
Keyword(s):  
Stainless Steel ◽  
Electron Microscope ◽  
Austenitic Stainless Steel ◽  
High Speed ◽  
Annealing Process ◽  
Electron Backscattered Diffraction ◽  
Kikuchi Pattern ◽  
Ultrafine Grained ◽  
316L Austenitic Stainless Steel ◽  
Cold Rolled

The aim of the present study was to understand recrystallisation behaviour of a cold rolled AISI 316L austenitic stainless steel when annealed repetitively for short durations. The results were compared with isothermal annealing process. The evolving microstructure was examined by electron microscope. Electron backscattered diffraction was performed in a FEI NANO SEM 430 Field Emission Gun scanning electron microscope using an EDAX/TSL high-speed Digiview camera for Kikuchi pattern acquisition. Also progress of recrystallisation was assessed by hardness measurements at different annealing conditions. The study revealed distinct differences in the progress of recrystallisation of repeated and isothermally annealed specimens. Also the formation of ultrafine grained microstructure by repeated annealing process was noted.

Influence of Crystalline Elasticity on the Stress Distribution at the Free Surface of an Austenitic Stainless Steel Polycrystal. Comparison with Experiments

2007 ◽  
Vol 567-568 ◽  
pp. 149-152 ◽  
Author(s):  
Maxime Sauzay ◽  
Jiří Man
Keyword(s):  
Stainless Steel ◽  
Austenitic Stainless Steel ◽  
Room Temperature ◽  
Crack Nucleation ◽  
Numerical Study ◽  
Shear Stresses ◽  
Back Scattering ◽  
316L Austenitic Stainless Steel ◽  
Comparison With Experiments ◽  
Scanning Electron

This numerical study focuses on the recent observations of Man et al. [4] showing welloriented grains presenting no Persistent Slip Marking even if PSMs are observed in 86% of the surface grains in 316L austenitic stainless steel cycled at room temperature up to 60% of fatigue life. Scanning Electron Microscopy (SEM) permits us to build Finite Element (FE) meshes of the observed aggregates and to assign to the modelled grains the crystallographic orientations measured by Electron Back Scattering Diffraction (EBSD). Then, 3D FE computations using crystalline elasticity allow the evaluation of mean grain stress tensors and resolved shear stresses. The results could explain qualitatively the anomalous behaviour of the studied well-oriented grains which is partly due to the particular orientations and shapes of the neighbour grains. This study highlights the influence of crystalline elasticity and neighbour grains in microplasticity and crack nucleation.

The Characteristic of Surface Layers on Austenitic Stainless Steel after Glow-Discharge Nitriding Process

2010 ◽  
Vol 165 ◽  
pp. 165-168 ◽  
Author(s):  
Artur Sitko ◽  
Marek Szkodo ◽  
Maria Gazda
Keyword(s):  
Stainless Steel ◽  
Electron Microscope ◽  
Austenitic Stainless Steel ◽  
Xrd Analysis ◽  
X Ray Diffraction ◽  
Surface Layers ◽  
X Ray ◽  
Diffusion Layers ◽  
Chemical Constitution ◽  
Scanning Electron

This paper presents investigation of surface layers. The diffusion layers were produced by using different parameters of reactive atmosphere (N2:H2). The research of the surface layers was performed using scanning electron microscope (SEM). The results of energy dispersive X-ray (EDX) analysis and X-ray diffraction (XRD) analysis are presented. Research reveals the influence of chemical constitution of reactive atmosphere on the change of properties of nitrided layers.

scholarly journals Friction and wear behaviors of a high nitrogen austenitic stainless steel Fe-19Cr-15Mn-0.66N

2021 ◽  
pp. 25-25 ◽  
Author(s):  
Y.-X. Qiao ◽  
S.-L. Sheng ◽  
L.-M. Zhang ◽  
J. Chen ◽  
L.-L. Yang ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Wear Resistance ◽  
Electron Microscope ◽  
Austenitic Stainless Steel ◽  
Laser Scanning ◽  
Friction And Wear ◽  
Surface Hardness ◽  
High Nitrogen ◽  
Laser Scanning Confocal Microscope ◽  
Scanning Electron

The friction and wear behaviors of a Fe-19Cr-15Mn-0.66N high nitrogen austenitic stainless steel (HNSS) were investigated. Tribological investigations were carried out under different applied loads of 5 N, 10 N, 15 N and 20 N. Scanning electron microscope (SEM) and laser scanning confocal microscope (LSCM) were used to understand the wear mechanisms under different loads and the reasons for the improved wear resistance. The lower friction coefficient and improved wear resistance were observed with the increase in applied loads. Under a higher load, the friction enhanced the work hardening ability of HNSS, which in turn improved its surface hardness and thus the increased wear resistance of HNSS.

Salt Spray Corrosion Behaviour of Austenitic Stainless Steel Matrix Composites

2001 ◽  
Vol 189-191 ◽  
pp. 346-351 ◽  
Author(s):  
Francisco Velasco ◽  
J. Kind ◽  
W.M. Lima ◽  
R. Marcé ◽  
J.A. Bas ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Austenitic Stainless Steel ◽  
Corrosion Behaviour ◽  
Salt Spray ◽  
Steel Matrix ◽  
Matrix Composites ◽  
Salt Spray Corrosion
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