International Technical Advisory Committee  
 
Professor Michael H. Loretto
 
  • B. Met (Sheffield 1955)
• D.Sc (Birmingham 1972)
 
IRC in Materials
 
  The University of Birmingham, B15 2TT, UK
Phone: +44 121 414 5214 Fax: +44 121 414 7890
Email: M.H.Loretto@bham.ac.uk
 
Research interests
 
Within the broad field of microstructure-property relationships, my interests have covered the application of transmission electron microscopy to defects in metals and the application of all electron beam techniques to microstructural characterisation. In addition the role of processing on controlling microstructure and hence properties has been a main interest. These approaches have been applied mainly to Ti-based alloys and to intermetallics with emphasis over the recent past on TiAl-based alloys. Current projects include:
 
i)
The role of hard particles and plastically anisotropic phases on the development of internal stresses in Ti- and TiAl-based alloys.
ii)
The development of Net Shape HIPping for production of components for aero engines.
iii)
Development of heat treatments to refine the structure and to improve the properties of cast TiAl components.
iv)
The role of carbon in influencing the ageing response of Ti-15-3 and other beta Ti alloys.
v)
Laser fabrication for the production of functionally graded Ti alloy components.
vi)
The development of alloys and process-routes for Nb-based silicides.
 
Selected publications
 
1. M. Loretto, L M Clarebrough & R L Segall, "Intrinsic and extrinsic nodes in a gold-tin alloy", Phil Mag, 1964, 10, 467, "Stacking fault tetrahedra in deformed fcc metals", Phil Mag, 1965, 12, 459. (With ).
2. M. Loretto, P. Humble and A.K. Head, "The influence of large elastic anisotropy on the determination of Burgers vectors of dislocations in beta brass by transmission electron microscopy", Phys stat solidi, 1967, 20, 521.
3. M. Loretto & R.J. Wasilewski, "Slip systems in NiAl single crystals at 77° and 300°K", Phil Mag, 1971, 23, 1311.
4. M. Loretto, I.P. Jones & H.L. Fraser, "Limiting factors in specimen thickness in CTEM and STEM", Phil Mag, 1977, 35, 159.
5. M. Loretto, J.W. Brooks & R.E. Smallman, "In situ observations of the formation of martensite in stainless steel", Acta Met, 1979, 27, 1829.
6. M. Loretto & C.P. Chang, "Bulk and dislocation core diffusion in RSP AlMo solid solutions", Phil Mag, 1988, 57, 593.
7. M. Loretto, X.D. Zhang, S. Godfrey, M. Weaver, M. Strangwood, P. Threadgill & M.J. Kaufman, "The massive transformation in intermediate TiAl alloys; mechanistic observations", Acta Materia, 1996, 44, 3723-34.
8. M. Loretto, Y.G. Li, P.A. Blenkinsop & N.A. Walker, "The structure & stability of precipitates in TiV25V15Cr -xAl alloys exposed at 550°C", Acta Mater, 1998, vol 46. No 16, pps 5777- 5794.
9. M. Loretto, X. Wu, D. Hu & R. Botten, "The significance of acoustic emission during stressing of TiAl-based alloys", Acta Materia, 2001, 49, 1693-1699
10. M. Loretto, Xinhua Wu, H. Jiang, A. Huang, D. Hu & N. Mota-Solis, "Microstructural study of pre-yielding and pre-yield cracking in TiAl-based alloys", Intermetallics, 2006, 14, 91-102.
 
 
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