>An alloy of iron, aluminium and carbon (steel’s other essential ingredient) is too brittle to be useful. Adding manganese helps a bit, but not enough for alumi

>An alloy of iron, aluminium and carbon (steel’s other essential ingredient) is too brittle to be useful. Adding manganese helps a bit, but not enough for aluminium-steel to be used in vehicles. >Dr Kim and his colleagues have, however, found that a fifth ingredient, nickel, overcomes this problem. As far as I know turbine blades are typically made of iron-nickel alloys. What is the new part of this discovery?