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Enhancing strength and ductility synergy through heterogeneous structure design in nanoscale Al2O3 particulate reinforced Al composites
Zan, Y. N.; Zhou, Y. T.; Liu, Z. Y.; Ma, G. N.; Wang, D.; Wang, Q. Z.; Wang, W. G.; Xiao, B. L.; Ma, Z. Y.
2019-03-15
Source PublicationMATERIALS & DESIGN
ISSN0264-1275
Volume166
AbstractNanoparticle reinforced aluminum matrix composites fabricated by a high energy ball milling method showed significantly improved strength, however, their ductility was relative lower. This study proposed for the first time a heterogeneous structure strategy toward good strength and ductility synergy for Al matrix composites. Nanoscale Al2O3 particulate reinforced pure Al composites were fabricated as model materials. Three ball milling procedures were conducted to construct uniform ultrafine grain, random bi-modal grain, and heterogeneous lamella grain structures. It was shown that all composites exhibited significantly improved tensile strength. The heterogeneous lamella structure provided the composites with increased tensile strength and ductility compared to the uniform or the random bi-modal grain structure. Compared to ball milled pure Al, the heterogeneous structure composite had 160% and 121% increases in yield stress and ultimate tensile stress, respectively. Meanwhile, its elongation was as high as 8%. The results were rationalized through back stress theory. Geometrically necessary dislocations were believed to be the main reason for the good ductility without strength sacrifice. (C) 2019 The Authors. Published by Elsevier Ltd.
KeywordMetal matrix composites Nanoparticles High energy ball milling Ultrafine grain Ductility
Indexed BySCI
Language英语
WOS IDWOS:000458260700020
PublisherELSEVIER SCI LTD
Citation statistics
Cited Times:7[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/81277
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
Zan, Y. N.,Zhou, Y. T.,Liu, Z. Y.,et al. Enhancing strength and ductility synergy through heterogeneous structure design in nanoscale Al2O3 particulate reinforced Al composites[J]. MATERIALS & DESIGN,2019,166.
APA Zan, Y. N..,Zhou, Y. T..,Liu, Z. Y..,Ma, G. N..,Wang, D..,...&Ma, Z. Y..(2019).Enhancing strength and ductility synergy through heterogeneous structure design in nanoscale Al2O3 particulate reinforced Al composites.MATERIALS & DESIGN,166.
MLA Zan, Y. N.,et al."Enhancing strength and ductility synergy through heterogeneous structure design in nanoscale Al2O3 particulate reinforced Al composites".MATERIALS & DESIGN 166(2019).
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