MSE Colloquium: Michael Loretto, The role of TEM/STEM in understanding the microstructures of deformed alloys and of alloy powders processed by laser fabrication

IRC in Materials, The University of Birmingham, Edgbaston

All dates for this event occur in the past.

264 MacQuigg Labs
105 W. Woodruff Ave.
Columbus, OH 43210
United States

Abstract

I would like in this talk to illustrate the pleasure one can get by working in several different areas simultaneously; all of the areas have in common the need to characterise microstructure in order to understand processing and properties of alloys. The talk will cover, briefly the formation of stacking fault tetrahedra by dislocation glide before looking very briefly at contrast mechanisms in the SEM. The major part will focus on the role of transmission electron microscopy in defining the microstructure of various alloys produced by laser powder bed processing. Based on these detailed studies a rather broad conclusion is drawn. If this technology is to be able reproducibly to produce reliable components, there is a need for improved instrumentation, which can be used to calibrate models and thus to optimisation of this and similar processes.

Bio

1955    Graduated B.Met (Hons.) Sheffield University. 
1955 -1962 Research Officer, CSIRO, Division of Tribophysics,  University of Melbourne,on defects in metals, 
1962-63 Fellowship at the  Cavendish Laboratory under Professor Sir Peter Hirsch
1963-1966 Continued work at Tribophysics, applying TEM to metals and alloys.
1966 Appointed to lecturership in the University of Birmingham, UK.
1969 Year’s sabbatical at Battelle in Columbus, Ohio as a Battelle Fellow 
1988 Appointed Head of School in Birmingham.
1989 Appointed  IRC Director and Director of Rolls-Royce UTC in 1990.
2001 Appointed Emeritus Professor at University of Birmingham. 

Supervised about 100 PhD students, published about 250 papers and two books. His work has been recognized by several awards, most recently the Cyril Stanley Smith Award by TMS.