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@ARTICLE{Best:453554,
      author       = {Best, James and Ostergaard, Halsey E. and Li, Bosong and
                      Stolpe, Moritz and Yang, Fan and Nomoto, Keita and Hasib, M.
                      Tarik and Muránsky, Ondrej and Busch, Ralf and Li, Xiaopeng
                      and Kruzic, Jamie J.},
      title        = {{F}racture and fatigue behaviour of a laser additive
                      manufactured {Z}r-based bulk metallic glass},
      journal      = {Additive manufacturing},
      volume       = {36},
      issn         = {2214-8604},
      address      = {Amsterdam [u.a.]},
      publisher    = {Elsevier},
      reportid     = {PUBDB-2021-00008},
      pages        = {101416},
      year         = {2020},
      abstract     = {Laser additive manufacturing of bulk metallic glass (BMG)
                      provides an effective bypassing of the critical casting
                      thickness constraints that limit the size of components that
                      can be produced; however, open questions remain regarding
                      the resulting mechanical properties. In this work, a
                      Zr-based BMG known as AMZ4 with composition
                      Zr$_{59.3}$Cu$_{28.8}$Nb$_{1.5}$Al$_{10.4}$ was printed
                      using a laser powder bed fusion (LPBF) technique. Micro
                      X-ray computed tomography results together with electron
                      microscopy imaging revealed porous processing defects in
                      LPBF produced AMZ4 that led to a loss in tensile strength.
                      Fatigue crack growth studies revealed a fatigue threshold,
                      $ΔK_{th}$., of ∼1.33 MPa√m and a Paris law exponent of
                      m = 1.14, which are relatively low values for metallic
                      materials. A K$_{IC}$ fracture toughness of
                      24−29 MPa√m was found for the LPBF BMG samples, which
                      is much lower than the K$_Q$ of 97−138 MPa√m and
                      K$_{JIC}$ of 158−253 MPa√m measured for the cast alloy
                      with the same composition. The lower fracture toughness of
                      the laser processed AMZ4 was attributed to ∼7.5× higher
                      dissolved oxygen in the structure when compared to the cast
                      AMZ4. Despite the higher level of oxygen, the formation of
                      oxide nanocrystals was not observed by transmission electron
                      microscopy. Oxygen induced toughness loss was confirmed by
                      dissolving elevated concentrations of oxygen into cast AMZ4
                      rods, which led to a reduction in bending ductility and
                      changes in the short-range order of the glass structure, as
                      revealed by synchrotron X-ray diffraction.},
      cin          = {PETRA III},
      cid          = {$I:(DE-H253)PETRA_III-20150811$},
      pnm          = {6G3 - PETRA III (POF3-622) / FS-Proposal: I-20190031
                      (I-20190031)},
      pid          = {G:(DE-HGF)POF3-6G3 / G:(DE-H253)I-20190031},
      experiment   = {EXP:(DE-H253)P-P07-20150101},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000600807800020},
      doi          = {10.1016/j.addma.2020.101416},
      url          = {https://bib-pubdb1.desy.de/record/453554},
}