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. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . BLOG ROLL


Apple Deal Puts Liquidmetal in Headlines


Technology company Apple has recently licensed Liquidmetal Technol- ogy’s intellectual property—space-age metal alloys that are as strong as titanium but use one-third the material, as well as scratch and corro- sion-proof. The alloy technology has been around for a few years, but the new buzz around the Apple deal is in part due to a prototype cast- ing machine that aims to make producing the parts more effi ciently.


The prototype equipment is based on a Buhler cold-chamber diecast- ing machine. The Cult of Mac website has been covering the news closely. According to a recent article on the site, Apple is expected to use the amorphous alloys for iPhone antennas and seamless gadget cases with holographic logos cast into the metal.


. . . . . . . . . . . . . . . . . . . . . . . . . . . . . POLL QUESTION


The July/August website question


asked: Which of the following is the most exciting casting material development?


Nanoparticles30.8% Magnesium 23.1%


in Casting


in Structural Parts


Metal Matrix 19.2% Compacted 15.4% 11.5%


Composites Graphite Iron


Improved No- Lead Copper


This month’s question is available at www.metalcastingdesign.com.


. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ONLINE ARTICLE


Understanding Porosity The term porosity is used extensively


by both casting suppliers and customers when talking about casting defects, but it does little to describe the actual prob- lem. “Porosity is such an all-encom- passing word,” said Vadim Pikhovich, materials engineer for specialty heavy truck manufacturer Oshkosh Corp., Oshkosh, Wis. “It can be shrink in the form of micropores, sponge-type voids, large macro-voids, inclusions. It all gets bundled up in one big word: porosity.” Porosity is often used to describe any


tion and frequency are important in defining the specific defect, determining its cause and analyzing the extent to which it will adversely affect the cast- ing’s properties or functionality. By knowing the casting factors that


void or hole found in a casting. But the morphology of pores in terms of their size, shape, surface constituents, loca-


are likely to contribute to the different defects, you can work with the casting supplier to avoid potential problems, relocate porosity-prone areas to non- structural sections of the part and establish mutually acceptable levels of porosity present.


. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ONLINE RESOURCES


Wherever you fi nd the cast metal “at” sign (right), reference the given website for more information.


SEPTEMBER/OCTOBER 2010


Castings Take Manitowoc Co.’s Cranes to New Heights (p. 22): Hear an audiocast with members of Manitowoc Crane’s design and purchasing team.


Gray Iron’s New Role in Manufacturing (p. 28): Find more information on casting trends for gray iron and other metals.


Survival of the Fittest Diecaster (p. 39): Read an article on how diecasters are using rapid tooling for shorter lead times.


METAL CASTING DESIGN & PURCHASING 3


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