Rheo-diecast Mg-Gd-Y-Zn Alloy

Free of oxide films and pores

Compared with conventional HPDC alloys, this rheo-diecast alloy eliminates oxide films and pore defects, leading to substantially improved elongation.

Chang, Zhiyu · Deng, Qingchen · Wu, Yujuan · Feng, Jian · Daquan, Li · Ren, Xukai · Yu, Huanwei · Du, Xiyong · Wang, Guobiao · Yuhao, Jin · Lan, Qiao · Liu, Baoliang · Peng, L. M. · Wenjiang, Ding

Journal of Alloys and Compounds 2024

Specifications

Elongation

6.4 %

Ultimate tensile strength

270 MPa

Yield strength

201 MPa

Advantages

No oxide films or pores

The rheo-diecasting process eliminates oxide films and pore defects common in conventional HPDC, thus avoiding premature fracture caused by these defects.

Substantially higher elongation

Owing to the elimination of oxide films and pore defects and the excellent ductility of the α-Mg matrix, RDC alloys exhibit superior elongation compared to HPDC alloys.

Trade-off: lower strength, better ductility

Compared to HPDC alloys, RDC alloys have lower strength but higher elongation, making them suitable for applications where ductility is more critical.

Applications

• Lightweight structural components：Use for lightweight structural parts requiring good ductility, replacing defect-prone conventional die castings.
• Aerospace components：Aerospace components need low density and sufficient ductility to withstand complex loads and ensure damage tolerance.
• Automotive parts：Automotive parts must absorb energy during crashes; improved elongation enhances safety.