Time Dependence of γ/γ' Lattice Mismatch in Creep-Deformed Single Crystal Superalloy SC16 at 1173 K

G. Schumacher; N. Darowski; I. Zizak; Hellmuth Klingelhöffer; W. Chen; Wolfgang Neumann

doi:10.4028/www.scientific.net/MSF.539-543.3059

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HomeMaterials Science ForumMaterials Science Forum Vols. 539-543Time Dependence of γ/γ' Lattice Mismatch in...

Time Dependence of γ/γ' Lattice Mismatch in Creep-Deformed Single Crystal Superalloy SC16 at 1173 K

Abstract:

The profiles of 001 and 002 reflections have been measured at 1173 K as a function of time by means of X-ray diffraction (XRD) on tensile-creep deformed specimens of single crystal superalloy SC16. Decrease in line width (full width at half maximum: FWHM) by about 7 % and increase in peak position by about 3x10-4 degrees was detected after 8.5x104 s. Broadening of the 002 peak profile indicated a more negative value of the lattice misfit after the same time period. The results are discussed in the context of the anisotropic arrangement of dislocations at the γ/γ’ interfaces during creep and their rearrangement during the thermal treatment at 1173 K.

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Materials Science Forum (Volumes 539-543)

Pages:

3059-3063

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.539-543.3059

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Online since:

March 2007

Authors:

G. Schumacher, N. Darowski, I. Zizak, Hellmuth Klingelhöffer, W. Chen, Wolfgang Neumann

Keywords:

Creep Deformation, Lattice Distortion, SC16, Superalloy, X-Ray Diffraction (XRD)

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