Publication: Analysis of the interface and mechanical properties of field-assisted sintered duplex stainless steels
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2019-01-07
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ELSEVIER BV
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Abstract
The development of duplex stainless steels produced by powder metallurgy represents an interesting alternative to conventional fabrication routes, since typical routes imply a strict control of composition and temperature during the processing path in order to avoid undesirable brittle phases. This work proposes a sintering route, designated as field-assisted hot pressing technique, in which an alternating current is applied to consolidate duplex stainless steels with different initial austenite percentages, always higher than ferrite. In all the cases, a thin and hard planar interface composed by two different microconstituents is generated between austenite and ferrite, growing inside the ferritic phase. The good mechanical properties achieved by these field-assisted sintered duplex stainless steels, in terms of nanohardness, elastic modulus, yield strength, ultimate tensile stress and ductility, establish these steels as promising candidates to be introduced in the market.
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Duplex stainless steel, Field-assisted sintering, Interface, Microstructure, Mechanical properties, Powder, Diffusion, Austenite, Ferrite
Bibliographic citation
García-Junceda, A., Díaz-Rivera, C., Gómez-Torralba, V., Rincón, M., Campos, M., & Torralba, J. M. (2019). Analysis of the interface and mechanical properties of field-assisted sintered duplex stainless steels. In Materials Science and Engineering: A, 740–741, 410–419