When the finance ministers and central bank governors of the Group of 20 began their first meeting on June 4 in Busan,South Korea, they expressed their concern
The existing form and grain refining effects of small zirconium addition in pure Mg, Mg-Yb and Mg-Zn binary alloys, and Mg-Zn-Yb ternary alloy (ZK60-Yb) were in