Publications

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2010
W. Khalifa, A. D. M. M., Y. Tsunekawa, and M. Okumiya, "Effect of Ultrasonic Treatment on Fe-intermetallic Phases in ADC12 Al-Si Die Cast Alloy", Journal of Materials Processing Technology, pp. 2178–2187, 2010.
Khalifa, W., Y. Tsunekawa, and M. Okumiya, "Ultrasonic Grain Refining Effects in A356 Al-Si Cast Alloy", Transactions of the American Foundry Society, pp. 91-98, 2010.
2009
Khalifa, W., Y. Tsunekawa, and M. Okumiya, "Ultrasonic Grain Refining Effects in AC4CH Al-Si Cast Alloy", Symposium on the Sustainable Mechanical System, Toyota Technological Institute, Nagoya, Japan, December 4th, 2009.
Khalifa, W., Y. Tsunekawa, and M. Okumiya, "Effect of Ultrasonic Melt-Treatment on the Eutectic Silicon and Iron Intermetallic Phases in Al-Si cast Alloys", International Conference on Processing & Manufacturing of Advanced Materials (Thermec’2009), Berlin, Germany, August 24-29th, 2009.
El-Aziz, A., D. S. Raid, and W. Khalifa, "Stability and corrosion behavior of A356 Al-Si alloy treated by high intensity ultrasonic vibrations", 14th All-Polish Corrosion Symposium-“New Achievements in Corrosion Research and Engineering”- 327th Event of the European Federation of Corrosion, Jastrząb/Poraj (near Czestochowa) Poland, 25th - 27th Nov., 2009.
M. Yoshida, O. M., K. W. R. Ichiki, and H. T. T. K. C. Tekmen, Y. Tsunekawa, "Mechanical Properties of Aluminum Nitride Layer Formed by Duplex Coating of Barrel Nitriding and Plasma Nitriding", journal of Plasma Process and Polymers, vol. 6, pp. S310–S313, 2009.
M. Yoshida, O. M., T. C. R. Ichiki, and H. T. W. Khalifa, Y. Tsunekawa, "A novel method for the production of AlN film with high adhesion on Al substrate", Journal of Plasma Fusion Research SERIES, vol. 8, pp. pp. 1447-1450, 2009.
El-Aziz, A., D. S. Raid, and W. Khalifa, "Stability and corrosion behavior of A356 Al-Si alloy treated by high intensity ultrasonic vibrations", journal of Corrosion Protection, vol. vol. 52, issue No.11, pp. pp. 569, 2009.
M. Okumiya, M. Yoshida, R. Ichiki, Y.Tsunekawa, and T. M. and W. Khalifa, "Surface Modification of Aluminum Alloy Using a Barrel Nitriding", Fourth International Conference on Advances and Trends in Engineering Materials and Their Applications, AES-ATEMA’2009, Hamburg, Ger, Hamburg, Germany, AES, 2009.
Okumiya, M., M. Yoshida, R. Ichiki, K. W. C. Tekmen, and T. K. Y. Tsunekawa, "Surface Modification of Aluminum Using a Combined Technique of Barrel Nitriding and Plasma Nitriding", journal of Plasma Process and Polymers, vol. 6, pp. S287–S290, 2009.
2008
Khalifa, W., Y. Tsunekawa, and M. Okumiya, "Effect of Reheating to the Semisolid State on the Microstructure of the A356 Aluminum Alloy Produced by Ultrasonic Melt-Treatment", The 10th International Conference on Semi-Solid Processing of Alloys and Composites (S2P2008), Aachen, Germany, Sept 16–18, 2008.
M. Yoshida, O. M., K. W. R. Ichiki, T. Y. C. Tekmen, and T. K. T. Hara, "Mechanical Properties of Aluminum Nitride Layer Formed by Duplex Coating of Barrel Nitriding and Plasma Nitriding", The Eleventh International Conference on Plasma Surface Engineering (PSE2008), Garmisch-Partenkirchen, Germany, 2008.
M. Yoshida, O. M., T. C. R. Ichiki, W. Khalifa, and H. T. Y. Tsunekawa, "A novel method for the production of AlN film with high adhesion on Al substrate", International Congress on Plasma Physics, ICPP 2008 , Fukuoka International Congress Center, Fukuoka, Japan, 2008.
M. Okumiya, R. Ichiki, C. Tekmen, W. Khalifa, and T. K. Y. Tsunekawa, "Surface Modification of Aluminum Using a Combined Technique of Barrel Nitriding and Plasma Nitriding", The Eleventh International Conference on Plasma Surface Engineering (PSE2008), Garmisch-Partenkirchen, Germany , 2008.
Abd-Allah, M., W. Khalifa, S. A. Hafiz, K., and A. Raheem, "Effect of Flux on the Quality of A-TIG Welds", Proceedings of The 9th Cairo University International Conference on Mechanical Design and Production (MDP-9), January 8-10, (2008), , Cairo, Egypt, pp. paper no. 277, 2008.
Tash, M., W. Khalifa, and E. H. A., "Effect of Metallurgical Differences between 356 and 384 Alloys on Their Mechanical Properties", Proceedings of The 9th Cairo University International Conference on Mechanical Design and Production (MDP-9), January 8-10, (2008), , , Cairo, Egypt, pp. pp. 992-1004, 2008.
Khalifa, W., Y. Tsunekawa, and M. Okumiya, "Effect of Reheating to the Semisolid State on the Microstructure of the A356 Aluminum Alloy Produced by Ultrasonic Melt-treatment", Solid State Phenomena, vol. 141-143, pp. 499-504, 2008.
Khalifa, W., Y. Tsunekawa, and M. Okumiya, "Effect of Ultrasonic Melt Treatment on the Microstructure of A356 Aluminum Cast Alloys", International Journal of Cast Metals Research, vol. 21, issue 1-3, pp. 129-134, 2008.
w. khalifa, Y. Tsunekawa, and M. Okumiya, "Effect of Ultrasonic Melt Treatment on the Microstructure of A356 Aluminum Cast Alloys", Proceedings of The 10th Asian Foundry Congress (AFC-10), , Nagoya, Japan, May 21st - 24th (2008), pp. pp. 149-154, 2008.
2007
Khalifa, W., Assessment of Competency and Proficiency of Carrying Out Hardness Tests According to International Standards for the Arab British Dynamics Co. (ABD) personnel working in hardness measurements, , Cairo, Egypt, Egyptian Accreditation Council (EGAC), pp. 1-10, Feb. 2007.
El-Aziz, A. M., W. Khalifa, H. Ahmed, and S. El-Taweel, "Structure and Corrosion Behaviour of Dissimilar Steel Weldments in Acid Media", German - Egyptian Year of Science & Technology, Materials Science Workshop, on Materials Based Manufacturing Technologies, CMRDI, Helwan, Cairo, Egypt., 7-9 May 2007.
Abd-Allah, M., W. Khalifa, S. A. Hafiz, K., and N. Abdel Raheem, "Assessment of Flux Composition in A-TIG Weldments", Metals Processing and Manufacturing Conference (MPM 2007) Nov. 19-22, Cairo – Egypt, CMRDI, pp. , pp. 9-23., 2007.
Khalifa, W., A. M. Samuel, F. H. SAMUEL, H. W. Doty, and S. VALTIERRA, "Effet des additions de bismuth et de calcium et du traitement thermique sur la microstructure et les propriétés mécaniques des alliages d'aluminium moulés B319", Fonderie, Fondeur d'aujourd'hui, issue 270, pp. 13-24, 2007.
2006
Khalifa, W., and R. El-Koussy, Earing Behavior of the 1050 Aluminum Alloy: Progress Report 2, Earing of Thick Sheets, , Naga Hammady, Egypt, Aluminum Company of Egypt, pp. 1-16, September 2006.
Khalifa, W., and R. El-Koussy, Earing Behavior of the 1050 Aluminum Alloy: Progress Report 1, Effect of DC Casting and Hot Rolling Conditions, , Naga Hammady, the Aluminum Company of Egypt, pp. 1-23, June 2006.
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