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A review on the current status of Fe-Al based ferritic lightweight steel

Defence Technology（防务技术） 2023年第8期26卷 1-22页

作者： Shivkumar Khaple brahma raju golla V.V.Satya Prasad Defence Metallurgical Research Laboratory HyderabadIndia Metallurgical and Materials Engineering Department National Institute of TechnologyWarangalIndia

There is an ever-growing demand for lightweighting of steel for structural applications,particularly for automobile and transportation *** is mainly to improve the fuel efficiency,reduce the CO_(2) emissions and cater the increased passenger ***,the main focus is to reduce the density of the steel structure without affecting other *** can be achieved by down-gauging of the conventional steel by replacing the steel with higher strength,however,it is limited by dent resistance and ***,the novel idea is to reduce the density of the steel *** is well-known that addition of Al to steel reduces the density of the *** 1wt% of Al addition to steel can reduce the density by 1.3%,decreases the elastic modulus by 2% and it improves the strength by about 40 *** is a new class of low-density/lightweight steel with addition of about 6-9 wt% Al to *** of higher than 9 wt%of Al in steel leads to embrittlement issues due to ordering and environmental *** disordered Fe-Al lightweight steels have raised considerable interest due to their low-density,high ductility,costeffectiveness and feasibility for bulk *** low-density steels are envisaged in the development of an advanced lightweight ground transportation system,huge structures and also for certain defence applications and in thermal power plants.

关键词： Low-density steels Disordered FeeAl Thermo-mechanical processing Microstructure Properties Structure-property correlation

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