1. Metallurgy and Materials Engineering Department; Suez University; 43721 Suez Egypt
2. Guest Scientist at the Steel Institute (IEHK) of the RWTH Aachen University; Intzestr. 1 52072 Aachen Germany
3. Steel Institute (IEHK) of the RWTH Aachen University; Intzestr. 1 52072 Aachen Germany