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
Article

Abstract

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.

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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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