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Nanoparticle additions promote outstanding fracture toughness and fatigue strength in a cast Al-Cu alloy
Yang, Chenglin; Zhao, Qinglong; Zhang, Zhenjun; Li, Linlin; Tian, Weisi; Liu, Rui; Zhang, Peng; Xu, Yijiang; Li, Yanjun; Zhang, Zhefeng; Jiang, Qichuan; Ritchie, Robert O.
2020-01-15
Source PublicationMATERIALS & DESIGN
Volume186
AbstractFatigue resistance and fracture toughness are essential to the reliability of castings during service. Reducing microporosity in cast alloys is a crucial issue for improving their fatigue strength and fracture toughness. Here we report a significant reduction inmicroporosity of a cast aluminum-copper alloy developed using in situ TiC nanoparticle additions coupled with a stir-casting method. The addition of TiC nanoparticles is found to improve the interdendritic feedability of liquidmetal and as a result reduces the volume fraction of microporosity by two orders of magnitude compared to a conventionally cast Al-Cu alloy. This method, which is mechanistically associated with a pore-dominated process, acts to significantly improve the fatigue strength, fracture toughness and uniform elongation of the cast Al-Cu alloy to values which, to the best of our knowledge, represent the highest ever achieved for a cast aluminum alloy. (c) 2019 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
DOI10.1016/j.matdes.2019.108221
WOS IDWOS:000505221700067
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/83217
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
Yang, Chenglin,Zhao, Qinglong,Zhang, Zhenjun,et al. Nanoparticle additions promote outstanding fracture toughness and fatigue strength in a cast Al-Cu alloy[J]. MATERIALS & DESIGN,2020,186.
APA Yang, Chenglin.,Zhao, Qinglong.,Zhang, Zhenjun.,Li, Linlin.,Tian, Weisi.,...&Ritchie, Robert O..(2020).Nanoparticle additions promote outstanding fracture toughness and fatigue strength in a cast Al-Cu alloy.MATERIALS & DESIGN,186.
MLA Yang, Chenglin,et al."Nanoparticle additions promote outstanding fracture toughness and fatigue strength in a cast Al-Cu alloy".MATERIALS & DESIGN 186(2020).
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