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$GYDQFHVLQ0DWHULDOV6FLHQFHDQG(QJLQHHULQJ $GYDQFHVLQ0HWDOOLF0DWHULDOV3URFHVVLQJ *XHVW(GLWRUV-\RWVQD'XWWD0DMXPGDU,JRU6PXURY6KRXMLQ6XQDQG,QGUDQLO0DQQD Advances in Metallic Materials Processing Advances in Materials Science and Engineering Advances in Metallic Materials Processing Guest Editors: Jyotsna Dutta Majumdar, Igor Smurov, Shoujin Sun, and Indranil Manna Copyright © 2011 Hindawi Publishing Corporation. All rights reserved. This is a special issue published in volume 2011 of “Advances in Materials Science and Engineering.” All articles are open access articles distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Advances in Materials Science and Engineering Editorial Board Marcel Ausloos, Belgium Richard Hennig, USA Luigi Nicolais, Italy Robert S. Averback, USA Dachamir Hotza, Brazil Tsutomu Ohzuku, Japan V. P. S. Awana, India Chun-Hway Hsueh, USA Xiaoqing Pan, USA Amit Bandyopadhyay, USA Rui Huang, USA Ganapathiraman Ramanath, USA Z. Barber, UK Shyh-Chin Huang, Taiwan Raju V. Ramanujan, Singapore Mark Blamire, UK Jacques Huot, Canada Jainagesh A. Sekhar, USA Susmita Bose, USA Hamlin Jennings, USA You Song, China Steve Bull, UK William A. Jesser, USA Charles C. Sorrell, Australia David Cann, USA A. Jorio, Brazil Steven L. Suib, USA Daolun Chen, Canada Kazuro Kageyama, Japan Wen-Hua Sun, China Manish U. Chhowalla, USA S. Komarneni, USA Sam-Shajing Sun, USA Paolo Colombo, Italy Prashant Kumta, USA Achim Trampert, Germany Martin Crimp, USA Pearl Lee-Sullivan, Canada An Pang Tsai, Japan Jie Dai, Singapore PavelLejcek,CzechRepublic Vladimir Tsukruk, USA C. K. Das, India Markku Leskela, Finland Krystyn Van Vliet, USA Chris Davies, Australia Jing Li, USA Stan Veprek, Germany J. Paulo Davim, Portugal Jun Li, Singapore Rui Vilar, Portugal Seshu Babu Desu, USA Yuanhua Lin, China Lianzhou Wang, Australia Yong Ding, USA Meilin Liu, Georgia Kunpeng Wang, China Jianwen Ding, China Zhimin Liu, China John Wang, Singapore Shi Xue Dou, Australia M. A. Loi, The Netherlands JorgM.K.Wiezorek,USA¨ Chunying Duan, China Hai Lu, China Aiguo Xu, China Nadia El-Masry, USA Yiu-Wing Mai, Australia Jenn-Ming Yang, USA David Field, USA Peter Majewski, Australia Yadong Yin, USA Qiang Fu, China A. S. H. Makhlouf, Germany Jihong Yu, China John W. Gillespie, USA R. S. Mishra, USA Guan-Jun Zhang, China Jeffrey T. Glass, USA S. Miyazaki, Japan Dao Hua Zhang, Singapore Zhennan Gu, China Paul Munroe, Australia Ming-Xing Zhang, Australia Hiroki Habazaki, Japan Korukonda Linga Murty, USA Contents Advances in Metallic Materials Processing, Jyotsna Dutta Majumdar, Igor Smurov, Shoujin Sun, and Indranil Manna Volume 2011, Article ID 180623, 2 pages Synthesis and Characterization of High-Entropy Alloy AlX FeCoNiCuCr by Laser Cladding,XiaoyangYe, Mingxing Ma, Wenjin Liu, Lin Li, Minlin Zhong, Yuanxun Liu, and Qiwen Wu Volume 2011, Article ID 485942, 7 pages Metallurgical Aspects of Laser Surface Processing of PM Cr-V Ledeburitic Steel,PeterJurci,ˇ Jiriˇ Cejp, and Jan Brajer Volume 2011, Article ID 563410, 8 pages Influence of Welding Parameters on Weld Formation and Microstructure of Dual-Laser Beams Welded T-Joint of Aluminum Alloy, Min Li, Zhuguo Li, Yong Zhao, Hao Li, Yuhua Wang, and Jian Huang Volume 2011, Article ID 767260, 6 pages Direct Laser Cladding of Cobalt on Ti-6Al-4V with a Compositionally Graded Interface, Jyotsna Dutta Majumdar Volume 2011, Article ID 509017, 4 pages Precise Hole Drilling in PMMA Using 1064 nm Diode Laser CNC Machine, Jinan A. Abdulnabi, Thaier A. Tawfiq, Anwaar A. Al-Dergazly, Ziad A. Taha, and Khalil I. Hajim Volume 2011, Article ID 137407, 5 pages The Fabrication of Automobile Components by Applying Electromagnetic Stirring in Semisolid Process, H. H. Kim and C. G. Kang Volume 2011, Article ID 232640, 12 pages Industrial Semi-Solid Rheocasting of Aluminum A356 Brake Calipers, U. A. Curle, J. D. Wilkins, and G. Govender Volume 2011, Article ID 195406, 5 pages The Influence of Prior Natural Aging on the Subsequent Artificial Aging Response of Aluminium Alloy A356 with Respective Globular and Dendritic Microstructures, Heinrich Moller,¨ Gonasagren Govender, Pierre Rossouw, and Waldo Stumpf Volume 2011, Article ID 375150, 6 pages Hindawi Publishing Corporation Advances in Materials Science and Engineering Volume 2011, Article ID 180623, 2 pages doi:10.1155/2011/180623 Editorial Advances in Metallic Materials Processing Jyotsna Dutta Majumdar,1 Igor Smurov,2 Shoujin Sun,3 and Indranil Manna1, 4 1 Department of Metallurgical and Materials Engineering, Indian Institute of Technology, Kharagpur 721302, West Bengal, India 2 Laboratory of Diagnostics and Engineering of Industrial Processes (DIPI Lab), Ecole Nationale d’Ing´enieurs de Saint-Etienne (ENISE), 58 rue Jean Parot, 42023 Saint-Etienne, France 3 Faculty of Engineering and Industrial Sciences, Swinburne University of Technology, Melbourne, VIC 3122, Australia 4 Central Glass and Ceramic Research Institute, 196 Raja SC Malik Road, Kolkata 700032, India Correspondence should be addressed to Jyotsna Dutta Majumdar, [email protected] Received 20 July 2011; Accepted 20 July 2011 Copyright © 2011 Jyotsna Dutta Majumdar et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Besides chemistry, processing route influences the micro- Laser surface cladding involves melting of clad material structures and properties of metallic materials significantly. coating using laser beam and applying it on the surface The emerging processing (fabrication) routes capable of with a minimum dilution at the interface. The first paper tailoring the microstructures and hence properties of metal- is on “Synthesis and characterization of high-entropy alloy lic materials include semisolid processing, spray forming, AlXFeCoNiCuCr by laser cladding” by X. Ye et al. presented melt spinning, and laser materials processing. Although the development of high entropy alloy (AlXFeCoNiCuCr) coat- present issue was initially proposed to present the articles ing on AISI 1045 steel substrate by laser surface cladding based on all novel processing routes and its status on under- technique. The characteristics of the clad layer in terms of standing the properties of materials, however, the topics and microstructure, chemical composition and constituent phas- papers are not extensive representation of all the areas of es are reported. The clad layers exhibited higher hardness advanced metallic materials processing. Furthermore, ad- at higher Al atomic content. AlFeCoNiCuCr clad layer also vanced processing of nonmetallic materials like polymeric exhibited increased high temperature (400◦C –700◦C) hard- materials is also included in the special issue. The special ness. issue contains eight papers, out of them three articles present Laser surface melting is a promising technique in im- research works related to semisolid processing and five con- proving the hardness, wear and corrosion resistance of sur- tributions on laser materials processing including one on face by grain refinement and homogenization of microstruc- processing of polymeric materials. The contributions from ture. The second paper entitled “Metallurgical aspects of the authors who have expertise in different areas of materials laser surface processing of PM Cr-V ledeburitic steel” by processing are gratefully acknowledged. Needless to mention P. Ju rciˇ et al. reported on laser surface melting of Vanadis that without the time and efforts spent by the reviewers, the 6 ledeburitic steel. Laser surface melting and subsequent special issue would not have been presented in this form. The rapid solidifying led to softening of the material due to the prompt reply and reminder by Ms. Doaa Shokry, Hindwai presence of retained austenite which could be improved by Publishers, is gratefully acknowledged. subsequent tempering which was concluded to be a challenge Laser materials processing is a promising route, where for the future investigations. The mechanism of melting and a high-power laser beam is used as a source of heat for solidification was presented in details. processing of materials. Faster processing speed, refinement Laser-assisted welding offers the advantages of develop- and homogenization of microstructure, narrow heat affected ment of weld zone with improved properties and flexibility in zone, and processing of any materials are the notable advan- welding of a wide varieties of materials including dissimilar tages associated with laser materials processing. The first five materials. The third paper concerns “Influence of welding articles are based on application of laser materials processing parameters on weld formation and microstructure of dual for the development of novel materials. laser beams welded T-joint of aluminum alloy” by M. Li 2 Advances in Materials Science and Engineering et al. In this paper, a detailed investigations of the effect of heat treated castings from the consecutive visual passed cast- the distance between two laser beams (d), welding speed (υ), ings. laser power (P), and the laser beam offset toward the stringer In the last paper of the special issue “The influence of (BOF) on the weld appearance, microstructure, and hardness prior natural aging on the subsequent artificial aging re- of the 1.8 mm thick 6061 aluminum alloy plates in T-joint sponse