Publications

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Conference Paper
Khalifa, W., Y. Tsunekawa, and M. Okumiya, "Thixocasting of AC4CH Alloy Billets Prepared by Ultrasonic Treatment", the 2nd International Symposium on Advanced Plasma Science and Its Applications for Nitrides and Nanomaterials (ISPlasma2010), Meijo University, Nagoya, Japan, March 7-10, 2010.
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.
Conference Proceedings
Abdelrahman, M. S., M. T. Abdu, and W. Khalifa, "Assessment of Eutectic Modification Level in Al-Si Alloys via Thermal Analysis", Light Metals, Los Angelos, TMS, pp. 885-894, 2017.
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.
zaki, A., S. El-Hadad, and W. Khalifa, "Assessment of Tribological Properties of Cast and Forged Ti-6Al-7Nb and Ti-6Al-4V Alloys for Dental Applications", TMS 145 Annual Meeting & Exhibition: Supplemental Proceedings, Nashville, USA, TMS, pp. 693–700, 2016.
Khalifa, W., A. M. Samuel, F. H. SAMUEL, and V. S. and H.W. Doty, "Effect of Bi and Ca Additions and Heat Treatment on the Microstructure and Mechanical Properties of the B319 Al Cast Alloys", Proc. 6th Arab Foundry Symposium “Arabcast 2006”, Sharm El-Sheikh – Egypt, The Egyptian Foundrymen’s Soc, pp. pp. 1-13, 2006.
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.
Fadl, M., W. Khalifa, and S. El-hadad, "Effect of Soaking Treatment on the Microstructure and Wear Behavior of the Ultrasonic Melt-Treated B390 Hypereutectic Al-Si Alloy", TMS Annual Meeting, Light Metals, vol. 2016, Nashiville, USA, TMS, pp. 821-825, 2016.
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.
Khalifa, W., F. Samuel, and J. Gruzleski, "Iron Intermetallic Phases in the Al-Corner of the Al-Si-Fe System", Internationl Conference on "Enabling Technologies for Light Metals and Composite Materials and Their End-Products" (COM 2002),, Montreal, 11-14 Aug. 2002, Metallurgical Society of the Canadian Institute of Mining and Metallurgy,, pp. pp.285-303, 2002.
Abbas, A., A. Seif, I. Elmahallawi, and W. Khalifa, "Microstructure and Hardness of Subzero Quenched and Heat Treated Ti-6Al-4V Alloy‏", Proceedings of the 3rd Pan American Materials Congress, Los Angelos, TMS, pp. 379-391, 2017.
Khalifa, W., M. T. Abdu, M. S. Abdelrahman, and Y. Tsunekawa, "Microstructure Control in A356 Al-Si Alloy with Ultrasonic Melt Treatment", Light Metals, Los Angelos, TMS, pp. 1013-1019, 2017.
Khalifa, W., F. H. SAMUEL, J. E. Gruzleski, and V. S. and H.W. Doty, "Role of Inclusions in the Nucleation of Fe-Intermetallic Phases in the Al-Si-Fe Alloys", Proc. 12th Arab International Aluminum Conference (Arabal-2006), Sharm El-Sheikh – Egypt, The Aluminum Company of Egypt (Egyptalum), pp. pp.257-80, 2006.
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.
Khalifa, W., "Thermal Analysis of Grain Refining in A319 Alloys", Light Metals, Los Angelos, TMS, pp. 1027-1034, 2017.
Journal Article
S. El-Hadad, K. W., S. F. H. A.M. Samuel, and V. S. and H.D. Doty, "Effect of Bi and Ca Additions on the Solidification Thermal Parameters of Sr-modified 319 Alloys", AFS Transactions, vol. 113, pp. 5-177, 2005.
El-Aziz, A. M., M. A. El-Hady, and W. khlifa, "Effect of High Intensity Ultrasonic Treatment on the Microstructure, Corrosion and Mechanical Behaviour of AC7A Aluminum Alloy", Light Metals, vol. 2016, pp. 721–724, 2016.
El-Aziz, A. M., M. A. El-Hady, and W. khlifa, "Effect of High Intensity Ultrasonic Treatment on the Microstructure, Corrosion and Mechanical Behaviour of AC7A Aluminum Alloy", Light Metals, vol. 2016, pp. 721–724, 2016.
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.
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", Materials Science Forum, vol. 638-642 , issue 2010, pp. 431-436, 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.
Abdel-Hakeem, A., M. Ghanem, W. Khalifa, and N. Abdel-Rehim, "Effect of Welding Parameters of FSW on Microstructure, Tensile Strength and Bendability of AA2024-T4 Aluminum Alloy", Bulletin of Tabbin Institute of Metallurgical Studies, vol. 2013, issue Jan, pp. 23-28, 2013.
Abdel-Salama, M., S. El-Hadad, and W. Khalifa, "Effects of microstructure and alloy composition on hydroxyapatite precipitation on alkaline treated α/β titanium alloys", Materials Science & Engineering C, vol. 104, issue 7, pp. 109974, 2019. msechap.pdf