Research

Relationship between composition-processing-properties of alloys and intermetallics for structural applications. Current research is aimed at understanding: (a) the influence of refractory element additions on the microsegregation and microstructural stability of nickel base single crystal superalloys, (b) intergranular precipitation, grain boundary morphology and properties of elevated temperature alloys and high strength aluminum alloys, and (c) the creep and stress-relaxation of nickel base superalloys and austenitic stainless steels, particularly in the temperature-stress domain where diffusional creep mechanisms are expected to contribute to strain.

Application

Developing the fundamental metallurgical knowledge required to design microstructures for structural alloys for the application conditions commonly found in hot section components of gas turbine engines and for high strength aluminum alloys.

Activities

Invited Speaker at 11th International Conference on Creep and Fracture of Engineering Materials and Structures, May 2008, Bayreuth, Germany.

Member: Scientific Committee for 6th International Conference on Processing and Manufacturing of Advanced Materials, August 2009, Berlin

Journal Articles

A. Pagliarello, J. Beddoes, “Correspondence of Stress Relaxation and Creep Behaviour of a Mn Stabilised Austenitic Stainless Steel”, Journal of Strain Analysis for Engineering Design 44 (2009) 201-209. DOI:10.1243/03093247JSA476.

A. Wisniewski, J. Beddoes, “Influence of Grain Boundary Morphology on Creep of a Wrought Ni-Base Superalloy”, Materials Science and Engineering A510-511 (2009) 266-272. DOI:10.1016/j.msea.2008.04.130

A. Wisniewski, J. Beddoes, “Effect of Solution Treatment Cooling Rate on Creep of a Mn-N Stabilised Austenitic Stainless Steel”, Journal of Materials Science 43 (2008) 5350-5357. DOI: 10.1007/s10853-008-2783-y.

S. Hedge, R. Kearsey, J. Beddoes, “Re-solidification Behaviour During Solutionizing of a Single Crystal Superalloy”, Scripta Materialia 57 (2007) 837-840. DOI: 10.1016/j.scriptamat.2007.07.001

Conference Publication

S. Hedge, R. Kearsey, J. Beddoes, “Design of Solution Heat Treatment for an Experimental Single Crystal Superalloy”, Superalloys 2008, The Minerals, Metals and Materials Soc. (2008) 301-310.