Magnesium-Yttrium Alloys,Scale-Up and Evaluation.

摘要

A magnesium alloy containing 9% yttrium, 1% zinc,and 0.5% zirconium was produced in the form of sheet and extrusions on production equipment and the resulting materials were then evaluated for structural performance. The measured room temperature strength properties of the sheet and extrusions were very high for a magnesium alloy. It was demonstrated that the sheet and extrusions can be fabricated into structural shapes and assemblies without undue difficulty. The projection was confirmed of a 21% weight reduction for a helicopter tail cone by switching certain components from aluminum to magnesium. The magnesium-yttrium panels,however,when tested to fracture,demonstrated little warning of impending rupture and it was concluded that this material was not acceptable for use in primary aircraft structures. (Modified author abstract)