Metallurgical and Materials Transactions A

, Volume 36, Issue 13, pp 681–689 | Cite as

Optimization of composition and heat treatment of age-hardened Pt−Al−Cr−Ni alloys

  • M. Hüller
  • M. Wenderoth
  • S. Vorberg
  • B. Fischer
  • U. Glatzel
  • R. Völkl


The objective of this work was to produce an alloy showing a microstructure similar to Ni-base superalloys, but with Pt as base metal. The Pt-base alloys with various contents of Al, Cr, and Ni were are melted. Solution heat treatments at 1450 °C followed by water quenching lead to single-phase alloys. Ageing at 1000 °C resulted in the precipitation of L12 ordered particles. An alloy with 11 at. pct Al, 3 at. pct Cr, 6 at. pct Ni, and Pt balance shows cuboidal precipitates with edge lengths of 200 to 500 nm along with a volume fraction of 23 pct and a lattice misfit of −0.1 pct. Aging at 1100 °C leads to coarsening of precipitates. Volume fraction and morphology of the precipitates were investigated by scanning electron microscopy and optical microscopy. X-ray diffraction as well as transmission electron microscopy (TEM) were applied to verity the crystal structure.


Material Transaction Solution Heat Treatment Lattice Misfit Solvus Line Cuboidal Precipitate 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© ASM International & TMS-The Minerals Metals and Materials Society 2005

Authors and Affiliations

  • M. Hüller
    • 1
  • M. Wenderoth
    • 2
  • S. Vorberg
    • 3
  • B. Fischer
    • 3
  • U. Glatzel
    • 2
  • R. Völkl
    • 2
  1. 1.Corporate Research Centre GermanyEADS Deutschland GmbHMunichGermany
  2. 2.Metallic MaterialsUniversity BayreuthBayreuthGermany
  3. 3.University of Applied Sciences JenaFB WTJenaGermany

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