超声和机械振动对Al-12Si-4Cu-1Ni-1Mg-2Mn活塞合金中富Mn相的演变及其力学性能的影响

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中文摘要：研究超声振动(UV)和机械振动(MV)对Al-12Si-4Cu-1Ni-1Mg-2Mn活塞合金中富Mn相演变及其力学性能的影响.结果表明,UV和UV+MV处理能显著细化和破碎合金的显微组织,且UV处理可以明显钝化初生富Mn金属间化合物Al15Mn3Si2相,并详细分析晶粒细化、钝化以及非枝晶颗粒的形成机理.与重力铸造的合金相比,经UV和UV+MV处理的合金在室温和高温下都表现出优异的拉伸性能和抗蠕变性能,这可归因于α(Al)晶粒和金属间化合物的细化、细小的耐热析出相比例增加以及纳米Si颗粒的形成.在350 ℃下,经UV处理合金的极限抗拉强度超过商用活塞合金,这表明所研制的活塞合金在高功率柴油机上具有很大的应用潜力.

外文标题：Effect of ultrasonic and mechanical vibration treatments on evolution of Mn-rich phases and mechanical properties of Al-12Si-4Cu-1Ni-1Mg-2Mn piston alloys

外文摘要：Effects of ultrasonic vibration(UV)and mechanical vibration(MV)on the Mn-rich phase modification and mechanical properties of Al-12Si-4Cu-1Ni-1Mg-2Mn piston alloys were investigated.The results show that the UV and UV+MV treatments can significantly refine and fragmentize the microstructures.In addition,UV treatment can significantly passivate the primary Mn-rich Al15Mn3Si2 intermetallics.The formation mechanisms of refinement and passivation of the grains and non-dendrite particleswere discussed.Compared with the gravity die-cast alloys,the UV and UV+MV treated alloys exhibit improved tensile and creep resistance at room and elevated temperatures.These results can be attributed to the refinement of the α(Al)grains and the secondary intermetallics,the increased proportion of refined heat-resistant precipitates,and the formation of nano-sized Si particles.The ultimate tensile strength of the UV treated alloys at 350 ℃ exceedsthat of commercial piston alloys.This indicates the high application potential of the developed piston alloys in density diesel engines.

外文关键词：

Al-Si piston alloysMn-rich phasesmechanical propertiesultrasonic vibrationmechanical vibration

作者：

林波、何项项、夏松超、肖华强、赵愈亮、Khashayar KHANLARI

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作者单位：

贵州大学机械工程学院,贵阳 550025

东莞理工大学机械工程学院,东莞 523808

Centro Nacional de Investigaciones Metalúrgicas(CENIM),C.S.I.C.,Avda.de Gregorio del Amo 8,Madrid 28040,Spain

Department of Chemical & Biotechnological Engineering,Université de Sherbrooke,Québec,QC J1K 2R1,Canada

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关键词：

铝硅活塞合金富Mn相力学性能超声振动机械振动

基金：

National Natural Science Foundation of ChinaScience and Technology Plan,Guizhou Province,ChinaTechnology Achievements Application and Industrialization Project,Guizhou Province,ChinaCultivation Project of Guizhou University,China

项目编号：

52265043ZK20212672021067201923

出版年：

2024

DOI：

10.1016/S1003-6326(24)66549-0

中国有色金属学报(英文版)

中国有色金属学会

中国有色金属学报(英文版)

CSTPCD

影响因子：1.183

ISSN：1003-6326

年,卷(期)：2024.34(8)