摘要
通过0°、45°和90°方向Cu/Al复合板的超声辅助单轴拉伸实验,研究了超声振动对复合板的拉伸力学性能、应变硬化指数及各向异性的影响;用显微硬度计测试了施加超声前后试样的硬度值,分析了超声对复合板硬度的影响规律;通过扫描电子显微镜观察了施加超声振动后复合板界面和断口形貌。结果表明:随着超声振幅的增加,90°方向的板材试样抗拉强度和伸长率先升后降,在振幅为16.97μm时达到最大;另外,超声振动使复合板伸长率在不同方向上的差异降低。施加超声振动提高了板材的应变硬化能力,弱化了板材的各向异性,降低了0°和45°方向板材的硬度,同时在超声振幅较大时对90°方向复合板的界面结合起到一定的改善作用。
The effects of ultrasonic vibration on tensile mechanical properties,strain hardening index and anisotropy of the laminate were studied by ultrasonic-assisted uniaxial tensile experiments of Cu/Al laminate in the 0°,45°and 90°directions.The hardness of the samples before and after the application of ultrasonic vibration were measured by microhardness tester,and the influence of ultrasonic vibration on the hardness of the laminate was analyzed.The effects of ultrasonic vibration on the interface and fracture morphology of the laminate were observed by scanning electron microscope.The results show that with the increase of ultrasonic amplitude,the tensile strength and elongation of the plate samples at 90°from the rolling direction first increase and then decrease,and reach the maximum value when the amplitude is 16.97μm.The ultrasonic vibration also reduces the elongation difference of the laminate in different directions.The application of ultrasonic vibration improves the strain hardening ability of the plate,weakens its anisotropy,reduces the hardness of the plate in the direction of 0°and 45°,and also improves the interface bonding of the laminate in the direction of 90°when the ultrasonic amplitude is large.
作者
曹厚臣
廖娟
CAO Houchen;LIAO Juan(School of Mechanical Engineering and Automation,Fuzhou University,Fuzhou 350116,China)
出处
《兵器材料科学与工程》
北大核心
2025年第5期13-19,共7页
Ordnance Material Science and Engineering
基金
国家自然科学基金(12272094)
福建省自然科学基金(2022J01541)。
关键词
Cu/Al复合板
超声振动
拉伸力学性能
各向异性
Cu/Al composite panel
ultrasonic vibration
tensile mechanical properties
anisotropy
