Mekanismer bakom spricktillväxt i superlegeringar

Research Project, 2012 – 2013

The objective is to investigate the mechanisms controlling cracking in advanced high strength alloys under the combined effect of load and environment. The aim is improve knowledge of the course of events down to the atomic scale to allow development of materials and methods to master these effects in hot aero engine parts, as well as material models capable of predicting the phenomena. This is crucial for Volvo Aero’s strategy of lighter structural components with increased temperature capability, allowing improvements in engine efficiency and lowering of emissions. The work will be carried out at the Division of Microscopy and Microanalysis at the Department of Applied Physics at Chalmers. During the exchange project microstructual characterization of fatigue tested specimens will be performed using high resolution analytical microscopy techniques such as scanning electron microscopy, transmission electron microscopy and tomographic atom probe, to understand the events occurring at the crack tip. The expected results include both an advancement of the research front allowed by the new advanced experimental techniques, and deeper understanding, which will be applied at VAC in on-going and future development projects. The knowledge will be transferred to VAC directly through the produced results and through the increased competence of the applicant, who will be employed part-time at VAC during the project to ensure continuous contact and knowledge transfer.

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