P.C.Angelo, Ph D, is internationally renowned in the fields of Powder Metallurgy, Materials Characterisation for over 40 years. He has taught, researched and published extensively in the areas of optical emission spectroscopy, optical microscopy, X-ray diffraction, X-ray fluorescence, electron probe microanalysis, scanning electron microscopy and scanning Auger microprobe. Dr Angelo began his career in 1962 as a scientist at the Defence Metallurgical Research Laboratory (DMRL), Hyderabad, India, one of the laboratories of Defence Research and Development Organization (DRDO), Government of India, NewDelhi. After 35 years of service he retired from DRDO and joined PSG College of Technology in the Department of Metallurgical Engineering and worked as Director, Metal Testing and Research Centre and as Professor and Dean for 20 years and retired in 2017. His books Powder Metallurgy: Science, Technology and Applications, Materials Characterisation and Non Ferrous Alloys have been well received as textbooks by numerous institutions. Presently, he is Visiting Professor at PSG College of Technology, Coimbatore, Tamil Nadu, India.

Dr.B.Ravisankar, Professor, Department of Metallurgical and Materials Engineering, National Institute of Technology, Tiruchirappalli has more than 25 years of Teaching cum Research experience. He has contributed a chapter on Equal Channel Angular Pressing (ECAP) to the "Handbook of Mechanical Nanostructuring" published by Wiley-VCH Verlag GmbH & Co, Germany. He also published a book on Non Ferrous Alloys, Cengage publishers, New Delhi.