简介 |
Magnesium alloys which possess good processability and/or ductility while retaining good resistance to corrosion and/or degradation comprising Y : 0-10% by weight, Nd : 0-5% by weight, wherein the total of Y+Nd is at least 0.05% by weight, one or more heavy rare earths selected from Ho, Lu, Tm and Tb in a total amount of above 0.5% and no more than 5.5% by weight, Gd : 0-3.0% by weight, and Sm : 0-0.2% by weight. The alloy optionally includes one or more of : Dy : 0-8% by weight; Zr : 0-1.2% by weight; Al : 0-7.5% by weight; Zn and/or Mn : 0-2% by weight in total; Sc : 0-15% by weight; In : 0-15% by weight; Ca : 0-3% by weight; Er up to 5.5% by weight, provided that the total of Er, Ho, Lu, Tm and Tb is no more than 5.5% by weight; and one or more rare earths and heavy rare earths other than Y, Nd, Ho, Lu, Tm, Tb, Dy, Gd and Er in a total amount of up to 0.5% by weight; the balance being magnesium and incidental impurities up to a total of 0.3% by weight. |