Hot deformation behavior and microstructure evolution of carbon nanotube/7055Al composite
作者： K. Ma , Z.Y. Liu , X.X. Zhang , B.L. Xiao , Z.Y. Ma
DOI: 10.1016/J.JALLCOM.2020.157275
关键词: Stress concentration 、 Strain rate 、 Nucleation 、 Abnormal grain growth 、 Materials science 、 Powder metallurgy 、 Composite number 、 Microstructure 、 Deformation (meteorology) 、 Composite material
摘要: Abstract In this study, carbon nanotube (CNT) reinforced 7055Al composite was fabricated by high energy ball milling combined with powder metallurgy. The as hot-pressed had an inhomogeneous microstructure composed of coarse grains without CNTs and fine uniformly dispersed CNTs. Processing maps were established the hot deformation behavior well evolution during investigated. It indicated that power dissipation efficiency relatively lower at higher temperature or strain rate. Abnormal grain growth (AGG) cracking occurred when deformed low A few embedded into AGG occurred, micro-cracks formed boundaries between grained zones. mechanism considered stress concentration caused dragging effect CNTs, reduced critical required for pore nucleation due to
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