For pioneering neutron diffraction studies of solidification kinetics and evolution of solid phases of lightweight alloys, enabling both development of new aluminum alloys for automotive industry and technological solutions for achieving reduced residual stress, and improved microstructure. Results of this research were used in improvement of manufacturing technologies in engine block casting and heat treatment. His innovations in magnesium casting led to stable casting operations in manufacturing of new advanced alloys and assisted in the continued employment of Canadians in this industry. Dr. Sediako received a number of international awards for his research from Russia, China, Taiwan, Canada, and United States.