超声功率对ZL114A-0.6Y合金组织与性能影响  

Effects of Ultrasonic Power on Microstructure and Properties of ZL114A-0.6Y Alloy

作　　者：柳玉军 LIU Yujun(Engineering Technical College,Nanchang Vocational University,Nanchang 330500)

机构地区：[1]南昌职业大学工程技术学院,南昌330500

出　　处：《特种铸造及有色合金》2024年第11期1548-1554,共7页Special Casting & Nonferrous Alloys

摘　　要：针对ZL114A-0.6Y合金力学性能不足问题,研究连续超声振动功率对ZL114A-0.6Y合金微观组织及力学性能的影响,探讨其作用机制。结果表明,超声振动功率对ZL114A-0.6Y合金的微观组织影响显著。随着超声功率增加,α-Al枝晶先减小后增大,枝晶形状由树枝状、花瓣状向粒状、细小等轴状转变。1200 W超声功率处理后微观组织最好,晶粒尺寸最小,且共晶Si形貌呈短棒状,分布均匀。另外,Y相体积有所减小,大部分以Al_(3)Y化合物点状、块状存在于Al-Si相晶界处。超声振动功率对合金力学性能影响显著,1200 W超声处理后合金力学性能最佳,平均显微硬度(HV)为124.26,平均抗拉强度为314 MPa,平均伸长率为5.3%。In view of the insufficient mechanical properties of ZL114A-0.6Y alloy,influence of continuous ultrasonic vibration power on microstructure and mechanical properties of ZL114A-0.6Y alloy was investigated,and the mechanism was described.The results indicate that ultrasonic vibration power has a significant effect on the microstructure of ZL114A-0.6Y alloy.With the increase of ultrasonic power,the size of α-Al dendrite is decreased firstly and then increased,and the morphology is converted from dendritic and petal shape to granular and fine equiaxial shape.At 1200 W,the microstructure is desirable with the desirable grain size,and the eutectic silicon morphology presents short rod shape with uniform distribution.In addition,the volume of Y phase is decreased,and most of Al_(3)Y compounds exist at the grain boundary of Al-Si phase in form of punctiform and blocky.Ultrasonic vibration power has a significant effect on mechanical properties of alloy,reaching optimal at 1200 W,where the average microhardness,tensile strength and elongation reach 124.26 HV,314 MPa and 5.3%,respectively.

关 键 词：ZL114A-0.6Y合金 超声功率 微观组织 力学性能 

分 类 号：TG249.21[金属学及工艺—铸造] TB559[理学—物理]