September 2018: Dr Sophie Primig: "On Conventional versus Direct Ageing of Alloy 718"
“Microstructural design of future aircraft engines with nano-scale sandwich particles”
Shorter flights over longer distances will transform the world’s business, society and culture. According to current market forecasts, air travel will now double every 15 years. Thus, stronger, more fuel-efficient air engines are urgently required due to positive impacts on our environment and health. A critical enabler for these benefits are advances in the physical metallurgy of the superalloys that are used in critical aero-engine components. In this paper, we revealed changes in the nanoscale morphology of Alloy 718 during an alternative processing route via high resolution microscopy. We found a change in the stacking sequence of nano-scale ‘sandwich’ particles and related this to increments in the high temperature yield strength, a design-critical mechanical property.
Read the full paper, as published in Acta Materialia Volume 156, pp 116–124, 2018.