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
1.State Key Lab of Advanced Design and Manufacturing for Vehicle Body, Hunan University, Changsha
410082, China; 2.School of Mechanical Engineering, Hunan International Economics University, Changsha 410205,
China; 3.School of Materials Science and Engineering, Central South University, Changsha 410083, China
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.
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#. JOURNAL OF VIBRATION AND SHOCK, 2018, 37(19): 112-117.
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