Don’t forget, educators can visit Granta’s Teaching Resources Website to browse, search for, and download relevant resources for those teaching materials across science, design, and engineering courses.
The 22nd MMPDS Coordination Meeting was held last week (October 23-26), with members meeting to discuss the ongoing development of the Metallic Materials Properties Development and Standardization (MMPDS) data. But what is MMPDS, and who uses it? A good way to find out is to take one of the new materials in the latest release, and ask some questions about why it’s in there. Lightweighting is certainly a hot topic at the moment, so perhaps the lightweight aluminum beryllium alloy (AMS 7911) highlighted in MMPDS-06 would be a good example. Continue reading
A Silly Mistake?
No one set out to develop Silly Putty: it was a novelty by-product during research aiming at new silicone elastomers to replace scarce rubber. In 1943, an engineer at General Electric, James Wright, was working in the New Haven laboratory when he accidentally dropped boric acid into silicone oil: the result was a bouncing silicone putty. The new material stretched more than rubber, even at high temperatures, but it also had some more interesting and unusual properties. Over long timescales or at high temperatures it flowed like a fluid. But at shorter timescales it bounced and behaved like an elastic solid. GE started marketing it, but it only really took off when the novelty value of this new material caught the attention of Peter Hodgson, a marketing consultant. He bought the rights from GE, and started marketing his ‘solid liquid’ as ‘Silly Putty®’.
As the 2012 Olympics open in London this week, athletic achievements, and gold medals in particular, are drawing everyone’s attention. At the original Olympics in ancient Greece, the winner simply received an olive wreath: when the games first restarted in 1894, winners received a trophy. For most of the recent Olympic history, however, the crowning glory of any athletic career has been the Olympic Gold Medal. But behind the excitement of sporting prowess, we wanted to know more about the gold in the medals themselves.