For a team of NASA and industry researchers seeking to make aviation more sustainable, it’s all about the twist. No, we’re not thinking of Chubby Checker and his signature song and dance. Instead, the focus here is on metal alloys whose molecules literally change shape when exposed to a certain temperature range. “It doesn't bend out of shape. It doesn't extend. It doesn't shrink. It twists on its axis,” said Othmane Benafan, a materials research engineer at NASA’s Glenn Research… (www.nasa.gov) 更多...
