Analysis of the interface and mechanical properties of field-assisted sintered duplex stainless steels

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING

卷:740

Article

Garcia-Junceda, Andrea¹  Diaz-Rivera, Coral²  Gomez-Torralba, Victor³  Rincon, Maria²  Campos, Monica²  Manuel Torralba, Jose² 

[1] IMDEA Mat Inst, Calle Eric Kandel 2, Getafe 28906, Spain

[2] Univ Carlos III, IAAB, Dept Mat Sci & Engn, Av Univ 30, Madrid 28911, Spain

[3] Univ Rey Juan Carlos, Calle Tulipan S-N, Madrid 28933, Spain

关键词: Duplex stainless steel;    Field-assisted sintering;    Interface;    Microstructure;    Mechanical properties;   

DOI  :  10.1016/j.msea.2018.10.111

来源: Elsevier

【 摘 要 】

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.

【 授权许可】

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