Woodruff School of Mechanical Engineering
Nuclear & Radiological Engineering and Medical Physics Programs
Recent developments in advanced nanomechanical testing techniques
Mr. Mike Davies
Tuesday, September 17, 2013 at 9:30:00 AM
Boggs Building, Room 3-47
Nanoindentation is now an established technique for determining the mechancical properties of thin films and small structures. In recent years the focus has been to provide test techniques which allow researchers to assess the performance of materials in their real life operating. This has led to the development of techniques designed to simulate a wide variety of tribological contacts on the nano-scale as well as environmental control options to allow testing in different humidity or at elevated tempertures up to 750oC. The seminar will use 3 case studies to highlight the practical use of advanced nano-mechanical test techniques in novel research across a range of application areas: 1) High temperature nanoindentation characteristation of power station steel mechanical and creep properties at operating temperatures. P91, P92 and ODS steels have been developed for their high temperature stability and creep resisitance and are currently in use in power stations globally. There is significant interest in the characterisation of the properties of the heat affected zone around welds and the oxides which form on these steels information which can only be accessed using nanoindentation at relevant temperatures. 2) The use of a multi-technique approach to characterise hard coatings for dry machining applications at elevated temperatures. Nanoindentation, scratch and nano-impact (high strain rate) techniques have been used to characterise the coatings under different loading conditions in order to asses the performance of prototype coatings reducing the requirement for lengthy conventional milling tests. 3) The development of nano-fretting experiments to fill an exisiting measuremnt gap and its use in examining high cycle wear behaviour in a variety of protective coatings and alloys. This section will draw on several example studies relating to the automotive, MEMS and biomaterials sectors.
Mike Davies is a Sales and Applications Engineer. Mike’s primary function is Sales and Applications support for Micro Materials North American reps.