Počet záznamů: 1  

Microstructural instability of L-PBF Co-28Cr-6Mo alloy at elevated temperatures

  1. 1.
    0546266 - FZÚ 2022 RIV NL eng J - Článek v odborném periodiku
    Roudnická, Michaela - Molnárová, Orsolya - Drahokoupil, Jan - Kubásek, J. - Bigas, J. - Šreibr, V. - Paloušek, D. - Vojtěch, D.
    Microstructural instability of L-PBF Co-28Cr-6Mo alloy at elevated temperatures.
    Additive Manufacturing. Roč. 44, Aug. (2021), č. článku 102025. ISSN 2214-8604. E-ISSN 2214-7810
    Grant CEP: GA MŠMT LM2018110
    Institucionální podpora: RVO:68378271
    Klíčová slova: Co-28Cr-6Mo * additive manufacturing * laser powder bed fusion * elevated temperature operation
    Obor OECD: Condensed matter physics (including formerly solid state physics, supercond.)
    Impakt faktor: 11.632, rok: 2021
    Způsob publikování: Omezený přístup
    https://doi.org/10.1016/j.addma.2021.102025

    So far, little is known about the thermal stability of Co-28Cr-6Mo alloy when produced by laser powder bed fusion (L-PBF), one of the mostly used AM technologies. In the present study, we reveal the instability of this material already at temperatures above 673 K. Material hardening accompanied with a significant loss of plasticity is caused by the breakdown of fine cellular microstructure with intercellular Mo segregation, precipitation of σ-phase and phase transformation of the matrix. Detail characterization by transmission electron microscopy was carried out for the maximum hardness state obtained after annealing the alloy at 1173 K for 5 h. The important findings of this study, representing an operational risk for L-PBF Co-28Cr-6Mo alloy, call for subsequent research into suitable heat treatment that would induce the stability of the material.
    Trvalý link: http://hdl.handle.net/11104/0322895

     
     
Počet záznamů: 1  

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