摘要
通过累积叠轧冷焊接的方式成功制备了Ni/Al复合材料。结果表明:叠轧道次n对Ni组元厚度减薄的影响经历2个阶段:当叠轧道次n≤3时,Al层的变形受到层状结构整体性的抑制,从而使得Ni层和Al层接近等比例协调变形,Ni层的减薄率与复合材料整体减薄率接近相等;当叠轧道次n≥4时,硬质组元Ni颗粒弥散分布于Al组元中的"镶嵌效应",使得Ni层减薄率远低于叠轧压下率。发现可通过观察Ni层断裂角度的大小来判断Ni层的断裂顺序,Ni颗粒纵向尖端角度越小,则断裂越早。建立了叠轧道次对Ni层减薄率、镍铝接触度影响的关系方程。
The Ni/Al composites were successfully prepared by accumulative roll bonding(ARB)process.It is found that the influence of the number of accumulative roll passes on the thickness of the Ni layer goes through two stages:when the number of ARB rolling passes is less than 3,the"coordinated deformation effect of the whole layered structure"results in the same thinning rate of the Ni layer as that of the whole composite;when the number of ARB rolling passes is more than 4,the"mosaic effect"of hard component Ni particles dispersed in Al component makes the thinning rate of Ni layer far lower than that of the whole composite.It is found that the fracture order of the Ni layer can be determined by observing the fracture angle of the Ni layer;and the smaller the longitudinal tip angle of the Ni particles,the earlier the fracture.The relationship equations of the influence of the number of ARB rolling passes on the thinning rate of the Ni layer and the contact degrees of the Ni-Al are established.
作者
崔岩
彭喜英
李新靓
王利成
孙新军
CUI Yan;PENG Xi-ying;LI Xin-liang;WANG Li-cheng;SUN Xin-jun(College of Metallurgy and Energy,North China University of Science and Technology,Tangshan 063210,China;Tangshan Polytechnic College,Tangshan 063299,China;Central Iron and Steel Research Institute,Institute of Structural Steels,Beijing 100081,China)
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2020年第6期1-6,共6页
Transactions of Materials and Heat Treatment
基金
国家重点研发计划项目(2016YFB0301200)
河北省自然科学基金项目(E2016209390)。
关键词
Ni/Al复合材料
累积叠轧
接触度
减薄率
multilayered Ni/Al composites
accumulative roll bonding(ARB)
contact degrees
thinning rate
