1. The Effect of Temperature and Mo Content on the Lattice Misfit of Model Ni-Based Superalloys
- Author
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Mark Hardy, Joe Kelleher, Howard J. Stone, Lewis Owen, KA Christofidou, Amy Goodfellow, Owen, Lewis [0000-0003-2311-3908], Stone, Howard [0000-0002-9753-4441], and Apollo - University of Cambridge Repository
- Subjects
lcsh:TN1-997 ,Materials science ,High Energy Physics::Lattice ,Astrophysics::High Energy Astrophysical Phenomena ,Neutron diffraction ,Thermodynamics ,nickel alloys ,02 engineering and technology ,01 natural sciences ,Computer Science::Digital Libraries ,Physics::Geophysics ,Condensed Matter::Materials Science ,Lattice constant ,neutron diffraction ,Lattice (order) ,0103 physical sciences ,lattice misfit ,General Materials Science ,lcsh:Mining engineering. Metallurgy ,010302 applied physics ,superalloys ,Metals and Alloys ,021001 nanoscience & nanotechnology ,Statistics::Computation ,Superalloy ,0210 nano-technology - Abstract
The lattice parameters and misfit of the &gamma, and &gamma, &prime, phases in a series of model quaternary Ni-based superalloys with and without Mo additions have been determined using neutron diffraction between room temperature and 700 °, C. Despite the fact that Mo is typically expected to partition almost exclusively to the &gamma, phase and thereby increase the lattice parameter of that phase alone, the lattice parameters of both the &gamma, phases were observed to increase with Mo addition. Nevertheless, the effect on the &gamma, lattice parameter was more pronounced, leading to an overall decrease in the lattice misfit with increasing Mo content. Alloys with the lowest Mo content were found to be positively misfitting, whilst additions of 5 at.% Mo produced a negative lattice misfit. A general decrease in the lattice misfit with increasing temperature was also observed.
- Published
- 2019
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