In situ determination of γ′ phase volume fraction and of relations between lattice parameters and precipitate morphology in Ni-based single crystal superalloy
✍ Scribed by A Royer; P Bastie; M Veron
- Publisher
- Elsevier Science
- Year
- 1998
- Tongue
- English
- Weight
- 669 KB
- Volume
- 46
- Category
- Article
- ISSN
- 1359-6454
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✦ Synopsis
AbstractÐDiraction pro®les of single crystal Ni-based superalloy samples with dierent microstructures were measured in situ up to the complete solutionizing of the g' phase, using a high resolution triple crystal diractometer and high energy synchrotron radiation (150 keV, l = 0.08 A Ê ). A comparison between an undeformed sample and creep-deformed specimens with various resultant microstructures evidenced a relation between the lattice parameter distribution, the g' precipitate microstructure and the sign of the connectivity. It was shown that a deformation induces a change in the relative volume cell of g and g' phases. Moreover, the high resolution of the experimental set-up allows in many cases the g' phase volume fraction to be measured with a good accuracy.