Simultaneously enhancing strength and toughness of Zr-based bulk metallic glasses via minor Hf addition

doi:10.1016/j.intermet.2019.106685

IMR OpenIR

	Simultaneously enhancing strength and toughness of Zr-based bulk metallic glasses via minor Hf addition
	Zhu, Y. H.; Zhu, Z. W.; Chen, S.; Fu, H. M.; Zhang, H. W.; Li, H.; Wang, A. M.; Zhang, H. F.
	2020-03-01
Source Publication	INTERMETALLICS
Volume	118
Abstract	Zr65.5-xHfxNb3Cu13Ni11Al7.5 = 0.0, 0.5, 1.0, 1.5 and 2.0 at.%) bulk metallic glasses (BMGs) were successfully prepared by copper mold casting. The effects of minor Hf addition on the mechanical properties and fracture mechanisms were investigated. The quasi-static compressive mechanical properties of Zr65.5-.HfxNb3Cu13-Ni 11Al(7.5) alloys were significantly improved by Hf addition. The optimum compressive fracture strength (at) and fracture strain (et) are 1516 MPa and 2.6%, respectively, for the Zr-64.5Hf(1),oNb(3)Cu(13)Ni(1) 1Al(7.5) alloy. The impact toughness of the Zr64Hf1.5Nb3Cu13Ni11Al7.5 alloy (At = 127 kJ/m(2)) is nearly four times than that of the Zr(65.5)Nb(3)Cu(13)Ni(11)Al(7.)5 alloy (Ak = 33 kJ/m2). The increase of the fracture surface area and the ratio of vein-like patterns regions caused by Hf addition play an important role in fracture energy dissipation under dynamic loading. The dependence of mechanical properties on the Hf content is closely related to the variation of free volume in the current alloys. The relationship between the Hf addition and the free volume change is discussed in detail. These results may provide new insights into simultaneously enhancing the plasticity and toughness of BMGs with minor alloying.
DOI	10.1016/j.intermet.2019.106685
WOS ID	WOS:000517854000005
Citation statistics	Cited Times:2[WOS] [WOS Record] [Related Records in WOS]
Document Type	期刊论文
Identifier	http://ir.imr.ac.cn/handle/321006/83092
Collection	中国科学院金属研究所
Recommended Citation GB/T 7714	Zhu, Y. H.,Zhu, Z. W.,Chen, S.,et al. Simultaneously enhancing strength and toughness of Zr-based bulk metallic glasses via minor Hf addition[J]. INTERMETALLICS,2020,118.
APA	Zhu, Y. H..,Zhu, Z. W..,Chen, S..,Fu, H. M..,Zhang, H. W..,...&Zhang, H. F..(2020).Simultaneously enhancing strength and toughness of Zr-based bulk metallic glasses via minor Hf addition.INTERMETALLICS,118.
MLA	Zhu, Y. H.,et al."Simultaneously enhancing strength and toughness of Zr-based bulk metallic glasses via minor Hf addition".INTERMETALLICS 118(2020).

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