Effect of Cold-Rolling on Precipitation Phenomena in 316L Austenitic Stainless Steel

2007 ◽  
Vol 26-28 ◽  
pp. 1287-1290 ◽  
Author(s):  
Y. Ohnishi ◽  
Atsushi Yamamoto ◽  
Harushige Tsubakino ◽  
Mititaka Terasawa ◽  
Shigeo Nakahigashi
Keyword(s):  
Stainless Steel ◽  
Synchrotron Radiation ◽  
Austenitic Stainless Steel ◽  
Residual Stresses ◽  
Cold Rolling ◽  
Reduction Rate ◽  
Rolling Reduction ◽  
Cold Rolling Reduction ◽  
316L Austenitic Stainless Steel ◽  
Precipitation Phenomena

Precipitation phenomena in an austenitic stainless steel, SUS316L cold-rolled with various reduction rates were studied by transmission electron microscopy and synchrotron radiation diffractmetry. After the aging at 573 K for 15000 h, two of precipitates were observed, which were identified as M7C3 and M23C6 by SR diffraction and electro diffraction measurements. The precipitates M7C3 were formed at both innergranular and grain boundary, while the precipitate M23C6 was formed at innergranular. The precipitation was promoted with increasing cold rolling reduction. Also segregation of phosphorous was detected along grain boundaries. Besides, the residual stresses were measured with side inclination method using a synchrotron radiation facility, SPring-8. The residual stresses were increased with increasing the cold rolling reduction rate.

Influence of Cold Rolling Reduction on Microstructure and Mechanical Properties in 204C2 Austenitic Stainless Steel

2019 ◽  
Vol 944 ◽  
pp. 193-198
Author(s):  
Tian Yi Wang ◽  
Ren Bo Song ◽  
Heng Jun Cai ◽  
Jian Wen ◽  
Yang Su
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Stainless Steel ◽  
Austenitic Stainless Steel ◽  
Ultimate Tensile Strength ◽  
Yield Strength ◽  
Cold Rolling ◽  
Stainless Steels ◽  
Rolling Reduction ◽  
Cold Rolling Reduction

The present study investigated the effect of cold rolling reduction on microstructure and mechanical properties of a 204C2 Cr–Mn austenitic stainless steel which contained 16%Cr, 2%Ni, 9%Mn and 0.083 %C). The 204C2 austenitic stainless steels were cold rolled at multifarious thickness reductions of 10%, 20%, 30%,40% and 50%, which were compared with the solution-treated one. Microstructure of them was investigated by means of optical microscopy, X-ray diffraction technique and scanning electron microscopy. For mechanical properties investigations, hardness and tensile tests were carried out. Results shows that the cold rolling reduction induced the martensitic transformation (γ→α ́) in the structure of the austenitic stainless steel. With the increase of the rolling reduction, the amount of strain-induced martensite increased gradually. Hardness, ultimate tensile strength and yield strength increased with the incremental rolling reduction in 204C2 stainless steels, while the elongation decreased. At the thickness reduction of 50%, the specimen obtained best strength and hardness. Hardness of 204C2 stain steel reached 679HV. Ultimate tensile strength reached 1721 MPa. Yield strength reached 1496 MPa.

Effect of cold rolling reduction on texture, recrystallization and mechanical properties of UNS S32304 Lean Duplex stainless steel

2021 ◽  
Vol 802 ◽  
pp. 140577
Author(s):  
Ariane Neves de Moura ◽  
Cláudio Moreira de Alcântara ◽  
Tarcísio Reis de Oliveira ◽  
Marco Antônio da Cunha ◽  
Marcelo Lucas Pereira Machado
Keyword(s):  
Mechanical Properties ◽  
Stainless Steel ◽  
Cold Rolling ◽  
Duplex Stainless Steel ◽  
Rolling Reduction ◽  
Lean Duplex Stainless Steel ◽  
Cold Rolling Reduction

Influence of Cold Working and Grain Size on Pitting Corrosion Resistance of Ferritic Stainless Steel

2011 ◽  
Vol 217-218 ◽  
pp. 1180-1184 ◽  
Author(s):  
Hua Bing Li ◽  
Zhou Hua Jiang ◽  
Qi Feng Ma ◽  
Zhen Li
Keyword(s):  
Grain Size ◽  
Stainless Steel ◽  
Corrosion Resistance ◽  
Cold Rolling ◽  
Ferritic Stainless Steel ◽  
Pitting Corrosion ◽  
Cold Working ◽  
Rolling Reduction ◽  
Pitting Corrosion Resistance ◽  
Cold Rolling Reduction

The influence of cold working and grain size on the pitting corrosion resistance of Fe-Cr-Nb-Mo ferritic stainless steel is investigated using optical microscope and electrochemical methods. The pitting corrosion resistance firstly decreases with increasing the cold-rolling reduction from 0% to 30% due to the number of nucleation site increasing. With increasing the cold-rolling reduction from 40% to 60%, the disappearance of grain boundaries, stacked dislocation and uniform microstructure results in the pitting corrosion resistance of the steel. With prolonging the annealing time, the grain size of the steel grows, and the pitting potential of the steel decrease. The smaller grain size promotes the formation of compact passive film and improves the pitting corrosion resistance.

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