Microstructural characteristics of post-shear localization in cold-rolled 316L stainless steel

This present paper is aims to study the influence of cold rolling process on the microstructure and corrosion behaviors of 316L stainless steel using potentiodynamics polarization testing techniques. The steel with initial thickness of 2.0 mm was unidirectional cold rolled to 10%, 30% and 50% reduction in thickness. The corrosion behaviors of the cold rolled steels were evaluated in phosphate buffered saline (PBS) as their simulated body fluids environment. The pH and temperature of the solution was maintained at 7.31 and 37°C and took approximately 5 hours for each individual test. The microstructure observations of the steels were studied using optical microscope and scanning electron microscopy (SEM). The results showed that the cold rolling process has modified the microstructure of 316L stainless steel by producing extensive surface defects. The microstructure modifications of the cold-rolled steel caused to enhance the corrosion resistance by lowering its corrosion rate to 23% and reduce the pitting resistance by lowering its breakdown potential to 61%. The pit corrosion was extensively appeared after reaching the breakdown potential.

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Influence of Warm Deformation on Strain-Induced Martensite Behavior of 316L Stainless Steel

Materials Science Forum ◽

10.4028/www.scientific.net/msf.913.254 ◽

2018 ◽

Vol 913 ◽

pp. 254-263

Author(s):

Da Zhang ◽

Hui Bin Wu ◽

Gang Niu ◽

Di Tang ◽

Na Gong

Keyword(s):

Grain Size ◽

Stainless Steel ◽

316L Stainless Steel ◽

Martensitic Transition ◽

Austenite Grain Size ◽

Martensite Content ◽

Austenite Grain ◽

Deformation Amount ◽

Strain Induced Martensite ◽

Cold Rolled

In order to control the ratio of nano/ultrafine structure grains of warm/cold rolled 316L stainless steel after annealing, the influence of deformation amount and temperature on martensite content and microstructure was investigated, and a model of the content of stain-induced martensite and deformation amount and temperature was established. Results showed that the content of stain-induced martensite was nonlinear with deformation amount, but with an incubation period. And it’s generally exponential. Martensitic transition occurred in large deformation stage. 58.23% strain-induced martensite was formed when deformation amount was 80% at 200°C. The content of martensite is the most significant factor that affects austenite grain size after annealing. With more strain-induced martensite, the average austenite grain size decreased, and the uniformity of grain size was improved, which was generally monotonous.

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Revisiting anisotropy in the tensile and fracture behavior of cold-rolled 316L stainless steel with heterogeneous nano-lamellar structures

Nano Materials Science ◽

10.1016/j.nanoms.2020.03.001 ◽

2020 ◽

Vol 2 (1) ◽

pp. 72-79 ◽

Cited By ~ 3

Author(s):

Zesheng You ◽

Huangliu Fu ◽

Shoudao Qu ◽

Weikang Bao ◽

Lei Lu

Keyword(s):

Stainless Steel ◽

Fracture Behavior ◽

316L Stainless Steel ◽

Lamellar Structures ◽

Cold Rolled

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Hot Deformation and Microstructural Characteristics of Nitrogen Enhanced 316L Stainless Steel

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.716.317 ◽

2016 ◽

Vol 716 ◽

pp. 317-322 ◽

Cited By ~ 3

Author(s):

Santosh Kumar ◽

B. Aashranth ◽

Dipti Samantaray ◽

Marimuthu Arvinth Davinci ◽

Utpal Borah ◽

...

Keyword(s):

Stainless Steel ◽

Critical Strain ◽

316L Stainless Steel ◽

Peak Stress ◽

Strain Rate Range ◽

Isothermal Compression ◽

Compression Tests ◽

Microstructural Characteristics ◽

Analysis Of Results ◽

Experimental Data Analysis

Dynamic recrystallization (DRX) in 316LN austenitic stainless steel with 0.14wt% nitrogen has been studied using hot isothermal compression tests carried out in temperature range 1073-1423K and strain rate range 0.001 - 10 s-1. Critical strain and stress for DRX has been characterized using experimental data. Analysis of results shows that for the entire domain the critical stress is directly proportional to peak stress. However, no clear relationship between εc and εp prevails over the entire tested domain. Dynamic Recrystallized (DRX) grains are quantified by GOS and KAM maps. The four stages of DRX progression have been identified using the correlation between GOS and critical strain at different deformation conditions.

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