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首页> 外文会议>Materials forum - aluminium alloys, their physical and mechanical properties - Volume 28 - 2004 >Effect of Sc+Zr Addition on Structures and Mechanical Properties ofRapidly Solidified 7090 Based Alloys
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Effect of Sc+Zr Addition on Structures and Mechanical Properties ofRapidly Solidified 7090 Based Alloys

机译：Sc + Zr添加对快速凝固7090基合金组织和力学性能的影响

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摘要

Effect of minor addition of Sc+Zr has been studied on the structures and mechanicalrnproperties of rapidly solidified Al-9%Zn-2.5%Mg-1%Cu based alloys containing transitionrnmetals (Co, Fe, Fe+Ni, Mn). The amount of Sc and Zr addition was 0.2mass% each.rnRapid solidification was performed by gas atomizing and splat quenching on arnwater-cooled Cu single roll under an argon atmosphere. The flakes were consolidated tornthe P/M materials by cold pressing, vacuum degassing and hot extrusion. Uniformrndistribution of Al3(Sc,Zr) particles was observed by TEM in the as-extruded P/M materialsrnwith Sc+Zr addition. Hardness became higher for the as-extruded P/M materials withrnSc+Zr addition than those without addition even after annealing at higher temperatures.rnUniform distribution of Al3(Sc,Zr) and η' particles were observed in the T6 treated P/Mrnmaterials. The size of η' particle is smaller than Al3(Sc,Zr) particle. The T6 treated P/Mrnmaterials with Sc+Zr addition showed higher hardness than the as extruded materials.rnHowever, T6 treated alloys with Sc+Zr addition did not always show higher tensilernstrength and fatigue strength than those without addition due to low ductility.
机译：研究了少量添加Sc + Zr对含有过渡金属（Co，Fe，Fe + Ni，Mn）的快速凝固Al-9％Zn-2.5％Mg-1％Cu基合金的组织和力学性能的影响。 Sc和Zr的添加量分别为0.2质量％。在氩气气氛下，通过在气体水冷的Cu单辊上进行气体雾化和splat淬火来进行快速凝固。通过冷压，真空脱气和热挤压将薄片固结成P / M材料。通过TEM观察，在添加Sc + Zr的P / M材料中，Al3（Sc，Zr）颗粒的分布均匀。即使添加了Sc + Zr的P / M材料，在高温下退火也比未添加的材料具有更高的硬度。在经过T6处理的P / Mrn材料中，观察到Al3（Sc，Zr）和η'颗粒的均匀分布。 η′粒子的尺寸小于Al 3（Sc，Zr）粒子。添加了Sc + Zr的T6处理的P / Mrn材料的硬度比挤压材料高。但是，由于塑性低，添加了Sc + Zr的T6处理的合金并不总是比没有添加的合金具有更高的拉伸强度和疲劳强度。

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