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LETTER TO EDITOR

 

02/2/2009 - Development in Light Metals: Science, Technology and Applications (2008) edited by F.S. Froes and E. Evangelista


ISBN: 81-89617-51-6. Indo American Books, Delhi, India. 2008. Hardcover. 148 pages. $89.00.

REVIEWED BY: Ravi Rungta,




The book represents the proceedings of a conference held in Italy in 1999 under the sponsorship of United Engineering Foundation, Inc. The original papers were published in 2000 in Key Engineering Materials, Trans Tech Publications. The proceedings have subsequently been published by Indo American Books in 2008. The proceedings are divided into three sections, titanium alloys, aluminum alloys, and magnesium alloys.

The section on titanium alloys contains seven papers of which four are focused on powder metallurgy. Since transportation industry is one of the primary areas of application for light weight titanium alloys, cost is a major consideration. In this regard the paper by Ivasishin et al. is especially of interest in that it focuses on near-net-shape processing, amongst which are powder metallurgy techniques, as the most appealing ways of cost reduction. Economic potential of titanium powder metallurgy processes depends on the availability of low cost powder and particular consolidation technology used. The study concluded that blended elemental powder metallurgy method proved to be successful in manufacturing titanium materials alloyed with molybdenum, aluminum, and oxygen. This involved cold compaction at a pressure of 800 MPa and sintering at a temperature of 1150–1200° C.

The section on aluminum alloys contains five papers dealing with mechanical alloying, strain localization and fatigue behavior, andthixoforming. While A356 & A357 Al-Si alloys containing magnesium have been successfully thixoformed into components of complex shapes, the investigation by Cabibbo et.al. found that 6082 alloy (Al-Mg-Si) showed problems when thixoforming complex shapes. The low fraction of liquid available at the thixoforming temperature was found to result in the formation of voids and hot-cracks in some locations of the component.

Thixoforming study is extended in the section on magnesium alloys. The three papers in this section deal with microstructure and mechanical properties of magnesium based alloys. The thixoforming study conducted by Evangelista et.al. on AZ91 alloy found that It is characterized by low ductility and tensile strength. However, the study found that the mechanical properties could significantly be improved by a solution-treatment that enhances ductility.

The book will be of value to researchers working on processing and the resulting microstructure and mechanical properties of aluminum, magnesium, and titanium alloys.<BR>

For more on Development in Light Metals: Science, Technology and Applications, visit the Indo American Books web site.


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