Microstructures and Properties for a Superalloy Powder Mixture Processed by Electron Beam Melting


  •  J. Hernandez    
  •  L. Murr    
  •  K. Amato    
  •  E. Martinez    
  •  P. Shindo    
  •  C. Terrazas    
  •  E. Rodriguez    
  •  F. Medina    
  •  R. Wicker    
  •  S. Li    
  •  X. Cheng    
  •  F. Yang    

Abstract

The microstructures and residual hardnesses for solid components of 2-phase TiAl (Ti-48Al-2Nb-2Cr in a/o) and Inconel 625 (Ni-19Cr-9Mo-4Nb in w/o) fabricated by electron beam melting (EBM) were compared with a 10:1 blend of TiAl: alloy 625 pre-alloyed powders producing a complex alloy having the composition 48Ti-24Al-9Ni-8Nb-4.5Cr-4Ni (in w/o).  The blended alloy hardness (HV) reached 7.5 GPa in contrast to 1.4 GPa for the Alloy 625 and 4.0 for the 2-phase TiAl alloy.  Reticulated mesh samples and stochastic foam samples prepared from the blended alloy by EBM exhibited a relative stiffness versus relative density plotted on a log-log basis consistent with other reference alloys fitted to a straight line with a slope n = 2 for ideal open cellular materials.


This work is licensed under a Creative Commons Attribution 4.0 License.
  • ISSN(Print): 1927-0585
  • ISSN(Online): 1927-0593
  • Started: 2012
  • Frequency: quarterly

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