超声振动和微量Sr+Sc对A380合金组织的影响及作用机理

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振动与冲击 ›› 2018, Vol. 37 ›› Issue (19) : 112-117.

论文

雷吉平1,2，余剑武1，罗红1，陈健美2，李伟2，李承波3

作者信息 +

Effects and action mechanism of trace Sr+Sc and ultrasonic vibration on microstructure of A380 Alloy#br#

LEI Jiping1,2,YU Jianwu1, LI Chengbo3, CHEN Jianmei2,LI Wei2, LUO Hong1

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文章历史 +

摘要

添加超声振动和微量Sr+Sc对A380合金进行变质处理，研究超声振动和微量Sr+Sc对A380合金显微组织和力学性能的影响及作用机理。结果表明：加入微量Sr+Sc与超声振动协同的作用使A380合金微观组织明显细化；加入0.15%Sr+0.3%Sc时，对组织的细化效果最理想，其晶粒尺寸最小，约为27μm，形状因子最大，为0.8；此时硬度和伸长率最大，分别为：113 BHN和4.7%；加入0.2%Sr+0.4%Sc时，强度最高，抗拉强度和屈服强度分别为：302MPa和272MPa。通过对A380合金熔体中超声空化场的仿真分析，探讨了超声波声流效应和空化效应对合金组织细化和力学性能提高的影响机理。

Abstract

Trace Sr+Sc and ultrasonic vibration (UV) were added in A380 alloy to implement modification processing and study effects and action mechanism of UV and trace Sr + Sc on microstructure and mechanical performance of A380 alloy.The results showed that the microstructure of A380 alloy can be refined significantly due to adding UV and trace Sr+Sc; the optimal refinement for the microstructure of A380 alloy is obtained when adding 0.15% Sr + 0.3% Sc and UV, its grain size is the smallest (about 27 μm) and its shape factor is the largest (about 0.8) with the highest hardness of 113BHN and the largest elongation of 4.7%; A380 alloy reaches the highest strength with its tensile strength of 302 MPa and its yield one of 272 MPa when adding 0.2% Sr + 0.4% Sc and UV.Through simulation analysis of ultrasonic cavitation field in melted A380 alloy, the influence mechanism of ultrasonic acoustic flow effect and cavitation one on alloy microstructure refinement and improvement of mechanical performance was explored.

导出引用

雷吉平1,2，余剑武1，罗红1，陈健美2，李伟2，李承波3. 超声振动和微量Sr+Sc对A380合金组织的影响及作用机理[J]. 振动与冲击, 2018, 37(19): 112-117

LEI Jiping1,2,YU Jianwu1, LI Chengbo3, CHEN Jianmei2,LI Wei2, LUO Hong1. Effects and action mechanism of trace Sr+Sc and ultrasonic vibration on microstructure of A380 Alloy#br#[J]. Journal of Vibration and Shock, 2018, 37(19): 112-117

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