4040 革新的耐熱マグネシウム合金 : 長周期積層構造型Mg-Zn-RE合金(S19-1 高機能マグネシウム合金の創成と変形,S19 高機能マグネシウム合金の材料強度特性)
詳細
Recently, new magnesium alloys with high mechanical strength and heat-resistance have been developed in Mg-RE-Zn (RE: Y, Dy, Ho, Er, Gd, Tb, Tm) system, and are widely noticed in industrial circles. These Mg-RE-Zn alloys are characterized by a long period ordered (LPO) structure. The mechanical properties of these LPO Mg-RE-Zn alloys are drastically improved by plastic deformation. Extruded LPO Mg-RE-Zn alloys exhibit high yield strengths greater than 350MPa and elongations of 4% or higher at ambient temperature, and high elevated-temperature yield strength greater than 300MPa at 473K. The LPO Mg-RE-Zn alloys are promising candidates for lightweight structural materials.
