“…17 It has been speculated that microalloying has a significant effect on the mechanical properties of materials, such as elasticity, plasticity, ductility, hardness, strength, stiffness, and impact resistance. [35][36][37][38] For example, microalloying of Sc, Ni, and Ce into C912 alloy (Al-Zn-Mg-Cu based alloy) significantly improves its strength and stress corrosion cracking resistance. 39 Particularly, the yield strength of Al-Zn-Mg alloy has been increased to 66 MPa by adding 0.10 wt% Sc and 0.10 wt% Zr, and it is increased to 96 MPa through adding 0.25 wt% Sc and 0.10 wt% Zr.…”