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A high strength low alloy steel fabricated by direct laser deposition

Wang, Qiang et al.

Vacuum. Volume 161 (2019, March); pp 225-231 -- Elsevier

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  • Title:
    A high strength low alloy steel fabricated by direct laser deposition
  • Author: Wang, Qiang;
    Zhang, Song;
    Zhang, Chunhua;
    Wang, Jianqiang;
    Shahzad, M. Babar;
    Chen, Haitao;
    Chen, Jiang
  • Found In: Vacuum. Volume 161 (2019, March); pp 225-231
  • Journal Title: Vacuum
  • Subjects: Vacuum--Periodicals; High strength low alloy steel--Direct laser metal deposition--Phase distribution--EBSD--Mechanical properties; Dewey: 621.55
  • Rights: legaldeposit
  • Publication Details: Elsevier
  • Abstract: Abstract:

    Direct laser metal deposition (DLMD) can produce near net shape parts by layer-by-layer deposition of metallic powders. In the present study, DLMD was used to fabricate a high strength low alloy (HSLA) steel. The characteristics of the microstructure and mechanical properties of the as-built HSLA were characterized using optical microscopy, electron back-scatter diffraction (EBSD), transmission electron microscopy, and tensile test machine respectively. It was found that the optimized parameters ensured a high quality of the built samples. The as-built HSLA steel was mainly composed of α-Fe (Ferrite) phase with a trace of C6Cr23and Fe3C phases. TEM result proved the formation of martensite phase. Most grain boundaries misorientation angles were low-angle grain boundary which elevated the strengthening effect. Tensile strength, yield strength, and elongation of the as-deposited HSLA were comparable with other high-performance alloy steels. The present results show the potential of DLMD for the fabrication of a HSLA with excellent mechanical properties.

    Highlights:

    A high strength low alloy steel (HSLA) was obtained by direct laser metal deposition.

    Gibbs free energy was used to illustrate the phases constitution of the as-built HSLA.

    The mechanical properties of the HSLA are excellent and comparable with other HSLAs.


  • Identifier: System Number: LDEAvdc_100077387770.0x000001; Journal ISSN: 0042-207X; 10.1016/j.vacuum.2018.12.030
  • Publication Date: 2019
  • Physical Description: Electronic
  • Shelfmark(s): ELD Digital store

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