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Simultaneously improving elastic modulus and damping capacity of extruded Mg-Gd-Y-Zn-Mn alloy via alloying with Si
Zhao, Di; Chen, Xianhua; Ye, Junliu; Chen, Tao; Dai, Yan; Liu, Chunquan; Luo, Zhu; Gao, Shiqing; Zhang, Jie; Yao, Jiahao; Atrens, Andrej; Tang, Aitao; Pan, Fusheng
2019-11-25
Source PublicationJOURNAL OF ALLOYS AND COMPOUNDS
ISSN0925-8388
Volume810
AbstractDeveloping magnesium (Mg) alloys with both high elastic modulus and damping capacity is a long-term challenge in the field of lightweight metals. Herein, it is shown that alloying with Si in Mg-Gd-Y-Zn-Mn simultaneously increased the elastic modulus and damping capacity. After Si alloying, the LPSO phase was greatly reduced and a large number of (RE + Si)-rich particles were formed. Due to the contribution of the high modulus second phases, the elastic modulus of the extruded Mg-Gd-Y-Zn-Mn alloy with a trace amount of Si was 49.3 GPa, 8 GPa greater than that of the extruded pure Mg. In addition, the extruded Mg-Gd-Y-Zn-Mn-Si alloy possessed good damping capacity at both room temperature (RT) and high temperature. At high strain amplitude, the extruded Mg-Gd-Y-Zn-Mn-Si alloy achieved a RT damping value of Q(-1) > 0.01, significantly higher than the extruded pure Mg, which was related to the high density of thermal mismatch dislocations in the vicinity of the interfaces between the reinforcing phase and the alpha-Mg matrix. With the increasing temperature, the extruded Mg-Gd-Y-Zn-Mn-Si alloy showed obviously higher damping capacity than the extruded Si-free alloy, which was attributed to the incoherent phase interfaces, weakened texture and thermal mismatch dislocations. (C) 2019 Elsevier B.V. All rights reserved.
KeywordExtruded Mg-Gd-Y-Zn-Mn-Si alloy Elastic modulus Damping capacity Si alloying
Indexed BySCI
Language英语
WOS IDWOS:000486596000036
PublisherELSEVIER SCIENCE SA
Citation statistics
Cited Times:2[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/80612
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
Zhao, Di,Chen, Xianhua,Ye, Junliu,et al. Simultaneously improving elastic modulus and damping capacity of extruded Mg-Gd-Y-Zn-Mn alloy via alloying with Si[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2019,810.
APA Zhao, Di.,Chen, Xianhua.,Ye, Junliu.,Chen, Tao.,Dai, Yan.,...&Pan, Fusheng.(2019).Simultaneously improving elastic modulus and damping capacity of extruded Mg-Gd-Y-Zn-Mn alloy via alloying with Si.JOURNAL OF ALLOYS AND COMPOUNDS,810.
MLA Zhao, Di,et al."Simultaneously improving elastic modulus and damping capacity of extruded Mg-Gd-Y-Zn-Mn alloy via alloying with Si".JOURNAL OF ALLOYS AND COMPOUNDS 810(2019).
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