期刊
MATERIALS CHARACTERIZATION
卷 168, 期 -, 页码 -出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.matchar.2020.110568
关键词
Graphene nanoplatelets; Bimodal grain metallic matrix; Mechanical properties; Strengthening mechanisms; Fractography
类别
资金
- Science and Engineering Research Board, Department of Science & Technology, Government of India [SERC/ET-0388/2012]
Present research work demonstrates utilization of a unique combination of consolidation techniques, spark plasma sintering and hot rolling, to fabricate bimodal Al-graphene nanoplatelet (GNP) nanocomposite, possessing excellent amalgamation of strength and ductility. Bimodal Al-GNP nanocomposites comprised of nano crystalline and microcrystalline Al (10, 20, 30, 40, 50 wt%) with 0.5 wt% functionalized GNPs were synthesized. Rolled Al-GNP nanocomposite containing 30 wt% microcrystalline Al exhibited 54% higher yield strength than rolled microcrystalline Al-GNP and 103% higher elongation than rolled nanocrystalline Al-GNP. A theoretical calculation of yield strength of the bimodal nanocomposite was carried out considering the different strengthening mechanisms viz. load transfer mechanism, grain refinement, and coefficient of thermal expansion mismatch. The load transfer mechanism contributed maximum (75%) towards strengthening in rolled 30 wt% microcrystalline bimodal Al-GNP nanocomposite. Microcrystalline Al compact fractured in ductile mode and the nanocrystalline counterpart exhibited brittle mode of failure. On the other hand, the bimodal nanocomposite showed mixed mode of fracture, ductile in microcrystalline Al regions and brittle in nanocrystalline Al regions.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据