中南大学学报（自然科学版）2012，Vol.43Issue(1)：74-80,7.
Y对Mg-Nd-Zn-Zr铸造镁合金组织和性能的影响
Effects of Y on microstructure and mechanical properties of Mg-Nd-Zn-Zr cast alloys
摘要
Abstract
Effects of Y on microstructure and mechanical properties of Mg-Nd-Zn-Zr cast alloys were investigated by the optical microscopy (OM), scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffractometry (XRD) and mechanical properties test. The results show that the mainly composition of as-cast Mg-Nd-Zn-Zr-xY (x=0, 0.6%, 1.2%, 1.8%, mass fraction) involves a-Mg and Mg12(NdaZn1-a) phase and the Y elements dissolved in them; the microstructure of the solution-treated alloys involves a-Mg, remnant Mg12(NdaZn1-a) phase and cuboid-shaped Mg24RE5 compound; after peak-aged, there areβ' andβ" phases precipitating with average sizes of 10 nm which obviously strengthen the matrix; the yield strength and ultimate tensile strength of the alloys are increased with the increasing content of Y, the maximum values reach 271 Mpa and 161 Mpa, respectively, which are evidently higher than that of the standard Mg-Nd-Zn-Zr alloy.关键词
Mg-Nd-Zn-Zr合金/Y/显微组织/热处理/力学性能Key words
Mg-Nd-Zn-Zr alloys/ Y/ microstructure/ heat treatment/ mechanical properties分类
矿业与冶金引用本文复制引用
王洪海,梁寒曙..Y对Mg-Nd-Zn-Zr铸造镁合金组织和性能的影响[J].中南大学学报（自然科学版）,2012,43(1):74-80,7.基金项目
国防研究资助项目(JPPT-115-2-794) （JPPT-115-2-794）
