Characterization of Iron Aluminide Diffusion Coatings Obtained after Friction Surfacing

Author:

Martins Norberto1ORCID,Silva Ana Paula1,Cordeiro da Silva Gilmar1,dos Santos Ítalo Bruno1,Santos Carlos Eduardo dos2,Troysi Fernanda3,Brito Pedro1ORCID

Affiliation:

1. Graduate Program in Mechanical Engineering, Pontifical Catholic University of Minas Gerais, Av. Dom José Gaspar 500, Belo Horizonte 30535-901, MG, Brazil

2. Federal Center for Technological Education of Minas Gerais, Av. Amazonas 5253, Belo Horizonte 30421-169, MG, Brazil

3. Faculty of Sciences and Technology, Federal University of Goiás, Rua Mucuri, Parque Itatiaia, Aparecida de Goiânia 749687-55, GO, Brazil

Abstract

Iron aluminides are considered as candidate materials for high temperature applications for their excellent high temperature corrosion and oxidation resistance. In the present work, iron-aluminide coatings were developed by friction surfacing (6351 aluminum alloy deposited on a low-carbon steel substrate) followed by a diffusion heat treatment. The initial coatings were found to be geometrically homogenous and adhered well to the steel substrate. The heat treatment process was carried out at 550 °C for 48, 72 and 96 h and the resulting coatings were characterized in terms of microstructure, chemical composition, hardness distribution and phase composition. After heat treatment, the coating/substrate interface morphology was modified and presented patterns typical of Fe-Al intermetallic formation, as well as a substantial increase in hardness (>900 HV) relative to the initial as-deposited condition. With the diffusion treatment, initially Fe2Al5 was found to develop in the coatings, which was converted into FeAl2 after longer exposures.

Funder

Coordination for the Improvement of Higher Education Personnel—Brazil

FAPEMIG

Publisher

MDPI AG

Subject

General Materials Science,Metals and Alloys

Cited by 1 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. Recent advances in aluminizing of mild steel plates;Reference Module in Materials Science and Materials Engineering;2024

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