New Al-Mg-Sc alloys

Data on new 01515, 01523, 01535, 01545, 01570 and 01571 wrought weldable al loys based on the Al-Mg-Sc system are presented. These alloys differ from e ach other, mainly, by magnesium content and belong to the family of non-hea t-treatable alloys. Wrought Al-Mg-Sc alloy semiproducts as-hot worked or as -annealed show much higher properties (especially yield strength) than thos e made from conventional Al-Mg alloys with the same magnesium content. Stre ngthening relates to both direct strengthening effect of the secondary Al3S c particles and development of a stable nonrecrystallized structure. Of Al- Mg-Sc alloys, 01570 alloy containing about 6% Mg has found the widest appli cation. Yield strength of hot worked or annealed 01570 alloy semiproducts i s at a level of 300 MPa, while yield strength of semiproducts made from a s imilar scandium-free alloy is about 180 MPa. Prospects of the usage of the new alloys for production of various structures are discussed. Published by Elsevier Science S.A.