Effect of nanostructured grains on martensite formation during plasma nitriding of AISI 321 austenitic stainless steel

2017 ◽  
Vol 310 ◽  
pp. 231-238 ◽  
Author(s):  
M. Golzar Shahri ◽  
M. Salehi ◽  
S.R. Hosseini ◽  
M. Naderi
Keyword(s):  
Stainless Steel ◽  
Austenitic Stainless Steel ◽  
Plasma Nitriding ◽  
Martensite Formation ◽  
Aisi 321

Effects of Deformation Mode on Resistivity Curve Used for Estimating Martensite Induced in Stainless Steel

2010 ◽  
Vol 638-642 ◽  
pp. 2992-2997 ◽  
Author(s):  
Hidefumi Date
Keyword(s):  
Stainless Steel ◽  
Austenitic Stainless Steel ◽  
Linear Relation ◽  
Volume Fraction ◽  
Tensile Deformation ◽  
Deformation Mode ◽  
Transformation Process ◽  
Martensite Formation ◽  
Austenitic Phase ◽  
Ε Phase

The martensite induced in three types of austenitic stainless steel, which indicate the different stability of the austenitic phase (γ), were estimated by the resistivity measured during the tensile deformation or compressive deformation at the temperatures 77, 187 and 293 K. The resistivity curves were strongly dependent on the deformation mode. The volume fraction of the martensite (α’) was also affected by the deformation mode. The ε phase, which is the precursor of the martensite and is induced from the commencement of the deformation, decreased the resistivity. However, lots of defects generated by the deformation-induced martensite increased the resistivity. The experimental facts and the results shown by the modified parallelepiped model suggested a complicated transformation process depending on each deformation mode. The results shown by the model also suggested a linear relation between the resistivity and the martensite volume at the region of the martensite formation. The fact denoted that the resistivity is mostly not controlled by the austenite, ε phase and martensite, but by the defects induced due to the deformation-induced martensite.

scholarly journals Plasma Nitriding of Mirror-Finished Austenitic Stainless Steel

2020 ◽  
Vol 86 (11) ◽  
pp. 885-891
Author(s):  
Yoshiki HANDA ◽  
Atsushi TAMURA ◽  
Petros ABRAHA
Keyword(s):  
Stainless Steel ◽  
Austenitic Stainless Steel ◽  
Plasma Nitriding
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