Effects of Aging Treatment on Laser-Welded Mg-Rare Earth Alloy NZ30K

الملخص EN

Magnesium-rare earth alloys have received extensive attention due to their attractive mechanical properties resulting from high density of precipitation.

The precipitation sequence in laser-welded Mg-3Nd-0.2Zn-0.4Zr (NZ30K) alloy during aging treatment at 200°C and 225°C has been investigated using transmission electron microscopy (TEM).

The results indicate that the tensile strength of laser-welded NZ30K can be improved significantly after aging treatment at 200°C for 8 h.

It is found that the precipitation in laser-welded NZ30K alloy follows the sequence of supersaturated solid solution → β′′(DO19) → β′(fcc).