 He has received the degree of Doctor of Science in metallurgy from MIT in 1964.The initial discovery of the synthesis of cast aluminum matrix composites including Al-graphite, Al-SiC, and Al-Al2O3 particulate cast MMCs was made by Rohatgi in 1965 at the Merica Laboratory of the International Nickel Company in Suffern, New York.This FOorst Synthesis of cast metal matrix composite material is considered a landmark in the 11,000-year history of metal casting.