Metallurgical Perspective of AISI 301LN (EN 1.4318) Grade Austenitic Stainless Steel for Future Transport Applications

Metallurgical Perspective of AISI 301LN (EN 1.4318) Grade Austenitic Stainless Steel for Future Transport Applications

Debasish Chatterjee

Adjunct Assistant Professor Practice, Department of Metallurgy and Materials Engineering, VNIT Nagpur, India

International Research Journal of Materials Sciences and Applications

Recently AISI 301LN grade austenitic stainless steel shows potential applications in manufacturing metro coach, oil tankers, bus body structures and wheels etc. Extensive strain induced martensite (SIM) formation property at crack tip of this steel helps toreduce frequent failure of this material. Formation of hard phase ‘SIM’ at crack tip delay crack propagation during fracture. In this way this type of steel promotes to make safe structural components. To fulfill European commission target before the year 2030, several attempts are going to enhance the mechanical performance of this particular steel by applyingadvanced thermomechanical treatments.In this regard only cold rolling and annealing treatments were used extensively in pastto make nano/ultra-fine grain structure, so that better structural properties can be achieved. It was found that, best mechanical properties (830 MPa Y.S., 953 MPa U.T.S., 36% elongation) were achieved after 80% cold rolling of this steel at ice-water mixture and annealing at 7000C for 20 minutes due to formation of ultra-fine grain (~0.74µm) structure. So in this review article all its thermomechanical properties are explored to find a scope towards further enhancement of its mechanical properties by advanced thermomechanicaltreatment to make safe body white structure of a vehicle.

Keywords: Strain Induced Martensite (SIM), Austenite, Lath and Dislocation Cell Martensite, Twin, Nano-Grains, Rail Coach.

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How to cite this article:
Debasish Chatterjee. Metallurgical Perspective of AISI 301LN (EN 1.4318) Grade Austenitic Stainless Steel for Future Transport Applications. International Research Journal of Materials Sciences and Applications, 2020 3:9.


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