Novel observation of dominant role of strain rate over strain during pre-straining on corrosion behaviour of 304L austenitic stainless steel

2022 ◽  
Vol 277 ◽  
pp. 125522
Author(s):  
Kaushal Kishore ◽  
A.K. Chandan ◽  
B.K. Sahoo ◽  
L.K. Meena
Keyword(s):  
Stainless Steel ◽  
Austenitic Stainless Steel ◽  
Strain Rate ◽  
Corrosion Behaviour ◽  
Dominant Role

The Role of Grain Size on Deformation of 316H Austenitic Stainless Steel

2012 ◽  
Vol 525-526 ◽  
pp. 201-204
Author(s):  
S. Mahalingam ◽  
Peter E.J. Flewitt ◽  
A. Shterenlikht
Keyword(s):  
Grain Size ◽  
Stainless Steel ◽  
Austenitic Stainless Steel ◽  
Strain Rate ◽  
High Purity ◽  
Constant Strain Rate ◽  
The Other ◽  
Point Bend ◽  
Different Grain Size

The polycrystalline high purity 316H austenitic stainless steel has been thermo-mechanically treated to produce material with two layers of grain size, one of coarser and the other of finer grains. Small three point bend specimens containing a notch positioned in either the coarser or finer layer have been tested at a constant strain rate and a temperature of -196°C. The results are discussed with respect to the effect of grain size on the underlying deformation between the two layers of different grain size.

Low velocity oxy fuel spraying of hydroxyapatite coating on a multifunctional UNS S31254 austenitic stainless steel

2021 ◽  
pp. 095441192110157
Author(s):  
Srikant Tiwari ◽  
Suryanarayan B Mishra
Keyword(s):  
Stainless Steel ◽  
Calcium Phosphate ◽  
Austenitic Stainless Steel ◽  
Bacterial Adhesion ◽  
Electrochemical Impedance ◽  
Corrosion Behaviour ◽  
Steel Substrate ◽  
The Body ◽  
Low Velocity ◽  
Uncoated Steel

Artificial material such as stainless steel (SS) is widely used for orthopaedic applications owing to its superior properties, ease of fabrication and lower cost. However, in the body environment, stainless steel can leach toxic elements such as nickel and chromium. To prevent this, a hydroxyapatite (HAp) coating having chemical characteristics very similar to the human bone was deposited on a medical-grade UNS S31254 austenitic stainless steel by a Low-velocity oxy-fuel spray gun (LVOF). The coating was characterised by using a field emission scanning electron microscope (FESEM), X-ray diffractometer (XRD) and Fourier transform infrared spectroscope (FTIR). The adhesion strength, microhardness and corrosion behaviour were studied using the Tensometre, Vickers microhardness tester and potentiodynamic polarisation with electrochemical impedance spectroscope. The bacterial adhesion and bioactivity of the coating were also evaluated. The LVOF sprayed HAp coating has shown better corrosion resistance, higher bioactivity and higher hardness than the uncoated steel. The presence of tricalcium phosphate, octa-calcium phosphate (OCP) and tetra-calcium phosphate (TTCP) was found in the coating. LVOF sprayed HAp coating is also found suitable in lowering the bacterial adhesion on the steel substrate.

Role of the annealing twin boundary on the athermal α′-martensite formation in a 304 austenitic stainless steel

Materialia ◽  
2021 ◽  
pp. 101218
Author(s):  
Fazlollah Sadeghi ◽  
Tahereh Zargar ◽  
Jong Wan Kim ◽  
Yoon-Uk Heo ◽  
Jae Sang Lee ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Austenitic Stainless Steel ◽  
Twin Boundary ◽  
Annealing Twin ◽  
Martensite Formation ◽  
304 Austenitic Stainless Steel ◽  
Annealing Twin Boundary
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