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Compressive behavior of Mg alloy foams at elevated temperature
Lu, Xiaotong; Zhang, Zhigang; Du, Hao; Luo, Hongjie; Mu, Yongliang; Xu, Jianrong
2019-08-15
Source PublicationJOURNAL OF ALLOYS AND COMPOUNDS
ISSN0925-8388
Volume797Pages:727-734
AbstractIt is the purpose of this work to investigate compressive behavior of closed-cell Mg alloy foams fabricated by melting method at elevated temperature. First, the Mg alloy foams were characterized by scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS) and X-ray diffraction (XRD) for microstructure, composition and phases, respectively. Then, the compressive tests were carried out on closed-cell Mg alloy foams at room temperature (25 degrees C), 200 degrees C, 400 degrees C and 500 degrees C. It is found that the effect of temperature on compressive behavior of the Mg alloy foams is different between high temperature and low temperature. The Mg alloy foams exhibit a brittle compressive behavior at room temperature by the fracture of cell walls. However, the pure brittle fracture mode transforms into a combination of brittle fracture mode and ductile fracture mode at temperature in the range of 200 degrees C-400 degrees C. This indicates a soften effect of high temperature on the foams matrix and the plasticity of the cell walls at low temperature. It is concluded that the compressive strength and energy absorption capacity of the closed-cell Mg alloy foams decrease with the increasing temperature. Furthermore, a new method of defining the densification strain is proposed based on the perspective of energy absorption efficiency. (C) 2019 Elsevier B.V. All rights reserved.
KeywordMg alloy foams Temperature Compressive behavior Densification strain
Indexed BySCI
Language英语
WOS IDWOS:000471128700084
PublisherELSEVIER SCIENCE SA
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/80840
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
Lu, Xiaotong,Zhang, Zhigang,Du, Hao,et al. Compressive behavior of Mg alloy foams at elevated temperature[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2019,797:727-734.
APA Lu, Xiaotong,Zhang, Zhigang,Du, Hao,Luo, Hongjie,Mu, Yongliang,&Xu, Jianrong.(2019).Compressive behavior of Mg alloy foams at elevated temperature.JOURNAL OF ALLOYS AND COMPOUNDS,797,727-734.
MLA Lu, Xiaotong,et al."Compressive behavior of Mg alloy foams at elevated temperature".JOURNAL OF ALLOYS AND COMPOUNDS 797(2019):727-734.
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