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Studies of amorphisation and crystallization of the Fe61Cr8Mo4Nb4(B0.7C0.3)23 alloy

Grant number: 20/04464-5
Support type:Scholarships in Brazil - Scientific Initiation
Effective date (Start): October 01, 2020
Effective date (End): May 31, 2022
Field of knowledge:Engineering - Materials and Metallurgical Engineering - Physical Metallurgy
Principal researcher:Walter José Botta Filho
Grantee:Gabriel Pedrino
Home Institution: Centro de Ciências Exatas e de Tecnologia (CCET). Universidade Federal de São Carlos (UFSCAR). São Carlos , SP, Brazil

Abstract

Stainless steels of different classes had their composition modified by the addition of boron, aiming to obtain amorphous phases and the controlled formation of borides. The formation of amorphous phase and the formation of borides aims to optimize the properties of alloys to be used for special coatings, specifically, with high resistance to corrosion and wear. Depending on the system, composition and processing employed, borides can be formed during solidification, or by precipitation in the solid state from crystalline phases, or during crystallization of an amorphous matrix. In each case, boride with different crystalline structures and compositions can be formed. In this context, the present work aims to produce through different processing routes a new Fe-based alloy, modified with additions of B and C, with composition Fe61Cr8Mo4Nb4(B0.7C0.3)23, and to study the ability to form amorphous phase and subsequently to study ts controlled crystallization. Structural and microstructural characterization will be performed using X-ray diffraction (XRD), electron diffraction, microanalysis by energy dispersive spectroscopy (EDS) and electron energy loss spectroscopy (EELS) and automatic phase identification mapping and crystallographic orientation mapping (ASTAR). Depending on the success in the development of the alloy, after its complete microstructural characterization, the properties of corrosion and wear resistance will also be studied.

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