JOM

, Volume 57, Issue 3, pp 49–51 | Cite as

A TEM investigation of the γ/γ′ phase boundary in Pt-based superalloys

  • S. Vorberg
  • B. Fischer
  • M. Wenderoth
  • U. Glatzel
  • R. Völkl
Research Summary High-Temperature Materials

Abstract

Precipitation-strengthened alloys in the system Pt-Al-Cr-Ni have been investigated by transmission-electron microscopy. Dense dislocation networks were found in an alloy with the nominal composition, in atomic percent, Pt-14Al-3Cr-4Ni after homogenization heat treatment and aging. Alloys with higher nickel content showed low overall dislocation densities and the γ/γ′ phase boundaries were almost free of dislocations. The loss of coherency in the alloy with a low nickel content is explained by high lattice misfit.

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Copyright information

© TMS 2005

Authors and Affiliations

  • S. Vorberg
    • 1
  • B. Fischer
    • 1
  • M. Wenderoth
    • 2
  • U. Glatzel
    • 2
  • R. Völkl
    • 3
  1. 1.the University of Applied SciencesJenaGermany
  2. 2.the Metallic Materials DepartmentGermany
  3. 3.the University of BayreuthGermany

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