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EDITORIAL The present issue marks an important goal for Teksid Aluminum: the 25th anniversary of Metallurgical Science and Technology (MS&T). Twenty five years of life represent a remarkable milestone which is not commonly reached by a scientific journal. MS&T is one of the few specialized editorial products edited by an industrial company. It has been always delivered world wide, free of charge and with continuity. This moment deserves a word on the nature of the Journal, on its intrinsic, permanent features as well as on its evolution and future perspectives. The birth of MS&T originated from the initiative of professor Sergio Gallo, former President of Teksid S.p.A., together with full professors Aurelio Burdese of the Politecnico di Torino and Walter Nicodemi of the Politecnico di Milano. They suggested to earmark part of the financial resources destined to the image promotion activities of the company for a specialized scientific review. Their proposal was warmly agreed by Antonio Mosconi, the then Managing Director of Teksid, who, in the first issue’s introduction, wrote: “The aim of Metallurgical Science and Technology is to initiate a dialogue, already part of the scene in other countries, between all those resources that are committed to the search for new frontiers in metallurgical techniques, so as to derive the greatest synergies from them. Metallurgical Science and Technology then enters the scene as an instrument whereby the dialogue between metallurgical science and metalworking industry can be taken to greater depths. ‘Academic’ metallurgy indeed, has often shown signs of hankering after pure science, estranged from industry. It should not be forgotten that its final objective remains practical application. A journal such as this is not as ambitious as to imaging that it can entirely fill the goal. Its aim is rather to inculcate the habit of comparison and so cast a permanent bridge between the two parties. Its very existence shows that the need to set up a more systematic and continuous two-way flow of information is seen by both sides as an indispensable prelude to its development.” Since these targets and perspectives were indicated, several changes have occurred in the life of Teksid Group, the sponsor and editor of the journal. The original name of the company, Teksid, evokes a core business centered on cast iron foundry. Founded in 1978 as a spin-off of Fiat metallurgical activities, its experience rooted in the very beginning of the Italian industrial development which started-up in the early century. Steel and cast-iron production were then the company’s core business focus. The global trend toward “energy conservation” triggered by the recurrent oil crises of the seventies and eighties induced Teksid to share and favor the efforts aiming at vehicle weight reduction: the interest of the Company then gradually Metallurgical Science and Technology shifted to light metal alloys – like magnesium and, above all, aluminum – as base materials. Teksid was then split into divisions depending on the material their industrial activity was dedicated to (iron, aluminum and magnesium). In 2002 the aluminum division was sold to the private equity market to give birth to Teksid Aluminum, today’s publisher of MS&T. It is known that today’s market dynamics, especially in the car production industry, is much and dramatically faster than in the past years, and Teksid Aluminum had to react to the changing scenario through a severe restructuring and divestiture process, which largely resized its traditional footprint of an international and industry leading company. The evolution experienced by Teksid Aluminum and the radical changes occurred during the last decades in science, in technology and consequently in our society, have left the objectives of the journal unchanged, and its contents have evolved coherently with the scientific and technologic trends of metallurgy. In the Company strategy, these changes have been accompanied by a constant search for innovative and competitive product solutions, by a constant effort to enable the costumers enjoy the company’ s collaboration, from the concept stage to the delivery of unfinished or completely machined products and by a constant attention the best combination of technical performance and product quality. This evolution has been reflected by MS&T too. This is not the place for presenting an exhaustive list of the topics covered by the journal in all these years. However probably some readers will remember academic and technological contributions dedicated to innovative forming techniques – such as lost-foam or semisolid forming, – or to the challenges derived by the emergence of new structural materials such as cast
magnesium alloys, or to thermomechanical treatments – like liquid hot isostatic pressing, – and to new experimental methods for testing metal properties and performance – thermoelastoplastic yield stress vs. conventional yield stress, and much more. Since its birth, this journal has hosted contributions of both academic research and metalworking industry from all over the world. Perhaps the ‘academicians’ have cooperated more enthusiastically than the industrial researchers to the “two-way flow of information” originally wished, but these attitudes is to be attributed both to the confidential nature of industrial research and to the old academic caveat “publish or perish” still alive in the web era.. In all these years Teksid Aluminum has treasured the MS&T bridging role between science and industrial expertise in the R&D programs of the Group. Furthermore the metallurgic community could enjoy a 25-year long support to scientific divulgation. We can assert that the targets, originally indicated by Mr. Mosconi, have been reached. Nowadays MS&T papers published since 1983 can be found in university libraries, academic institutions and industrial R&D laboratories all over the world. Notably, all the issues published since the year 2000 can be also retrieved comfortably from the Company website (www.teksidaluminum.com). The topics such as those mentioned above and unpredictable new ones – specifically related to light metals and alloys - will continue to arouse interest of contributors and readers of MS&T for many years to come, as the increasing cooperation and subscriptions testify. In a joyful anniversary like this one, we cannot conclude this editorial other than by congratulating with Metallurgical Science & Technology for its longevity and scientific maturity, and by wishing Happy Birthday and a long life! Metallurgical Science and Technology Editorial Panel
Page 2 and 3: THE JOURNAL IS ALSO AVAILABLE ON TE
Page 6 and 7: FRACTURE TOUGHNESS AND MICROSTRUCTU
Page 8 and 9: toughness tests were carried out im
Page 10 and 11: Table 3: F values for the materials
Page 12 and 13: A) B) A) C) Fig. 5: Fracture surfac
Page 14 and 15: The simple correlation proposed by
Page 16 and 17: INTRODUCTION The mechanical propert
Page 18 and 19: RESULTS OF THE MICROSTRUCTURE AND M
Page 20 and 21: In order to simulate the processes
Page 22 and 23: µ µ µ µ µ
Page 24 and 25: µ µ µ µ µ µ µ µ
Page 26 and 27: COMPARATIVE STUDY OF HIGH TEMPERATU
Page 28 and 29: EXPERIMENTAL The AZ31 experimental
Page 30 and 31: A) B) Fig. 4: Equi
Page 32 and 33: A) C) Fig. 8: Microstructure of the
Page 34 and 35: INSTRUCTIONS FOR AUTHORS To ensure

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