A new class of lightweight, stainless steels with ultra-high strength and large ductility.

Scientific Reports
Joonoh MoonChang-Hoon Lee

Abstract

Steel is the global backbone material of industrialized societies, with more than 1.8 billion tons produced per year. However, steel-containing structures decay due to corrosion, destroying annually 3.4% (2.5 trillion US$) of the global gross domestic product. Besides this huge loss in value, a solution to the corrosion problem at minimum environmental impact would also leverage enhanced product longevity, providing an immense contribution to sustainability. Here, we report a leap forward toward this aim through the development of a new family of low-density stainless steels with ultra-high strength (> 1 GPa) and high ductility (> 35%). The alloys are based on the Fe-(20-30)Mn-(11.5-12.0)Al-1.5C-5Cr (wt%) system and are strengthened by dispersions of nano-sized Fe3AlC-type κ-carbide. The alloying with Cr enhances the ductility without sacrificing strength, by suppressing the precipitation of κ-carbide and thus stabilizing the austenite matrix. The formation of a protective Al-rich oxide film on the surface lends the alloys outstanding resistance to pitting corrosion similar to ferritic stainless steels. The new alloy class has thus the potential to replace commercial stainless steels as it has much higher strength at similar fo...Continue Reading

References

Oct 15, 1996·Physical Review. B, Condensed Matter·G Kresse, J Furthmüller
Nov 1, 1993·Physical Review. B, Condensed Matter·G Kresse, J Hafner
Oct 28, 1996·Physical Review Letters·J P PerdewM Ernzerhof
Feb 15, 2002·Nature·Mary P RyanDavid S McPhail
Apr 21, 2007·Science·Y YamamotoE A Payzant
Mar 12, 2013·Science and Technology of Advanced Materials·Hansoo KimNack J Kim
Jun 15, 2018·Scientific Reports·Alireza RahnamaSeetharaman Sridhar
Nov 7, 2019·Nature·Dierk RaabeElsa A Olivetti

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Methods Mentioned

BETA
scanning electron microscopy
transmission electron microscopy
scanning

Software Mentioned

CAMECA
Interactive Visualization and Analysis Software ( IVAS
IVAS
Vienna Ab - Initio Simulation Package ( VASP )

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