Effect of Dy Addition on Glass-forming Ability and Mechanical Properties of Cu50Zr46Al4 Bulk Metallic Alloy

doi:10.11901/1005.3093.2020.063

Chinese Journal of Materials Research

2020, Vol. 34

Issue (8): 605-610 DOI: 10.11901/1005.3093.2020.063

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Effect of Dy Addition on Glass-forming Ability and Mechanical Properties of Cu₅₀Zr₄₆Al₄ Bulk Metallic Alloy

LI Dongmei¹, TAN Liming¹, ZHAO Qing¹, XIE Hanxi¹, YU Peng¹(

), XIA Lei²

1 College of Physics and Electronic Engineering Chongqing Normal University, Chongqing Key Laboratory of Photo-Electric Functional Materials, Chongqing 401331, China
2 Laboratory for Microstructure & Institute of Materials, Shanghai University, Shanghai 200072, China

Cite this article:

LI Dongmei, TAN Liming, ZHAO Qing, XIE Hanxi, YU Peng, XIA Lei. Effect of Dy Addition on Glass-forming Ability and Mechanical Properties of Cu₅₀Zr₄₆Al₄ Bulk Metallic Alloy. Chinese Journal of Materials Research, 2020, 34(8): 605-610.

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Abstract

A series of Cu_50-_xZr₄₆Al₄Dy_x(x=0~4) alloys is prepared by copper mold casting based on Cu₅₀Zr₄₆Al₄ bulk metallic glass (BMG). The effect of Dy addition on the glass forming ability and mechanical properties of Cu_50-_xZr₄₆Al₄Dy_x alloy was investigated through thermodynamics and mechanical experiments. It is found that 1%~2% (atomic fraction) Dy addition can significantly improve the thermal stability of Cu_50-_xZr₄₆Al₄Dy_x, and the glass forming ability of the alloy. The strength and plastic deformation ability of the alloy can be improved effectively by proper Dy addition. The influence of Dy addition on the glass forming ability and mechanical properties of Cu_50-_xZr₄₆Al₄Dy_x is also discussed.

Key words: metallic materials Dy addition micro-alloying glass-forming ability mechanical properties

Received: 27 February 2020

ZTFLH:

TB31

Fund: Chongqing Research Program of Basic Research and Frontier Technology(cstc2018jcyjAX0329);Chongqing Research Program of Basic Research and Frontier Technology(cstc2018jcyjAX0444);the Science and Technology Research Program of Chongqing Municipal Education Commission(KJZD-K201900501)

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	Dongmei LI
	Liming TAN
	Qing ZHAO
	Hanxi XIE
	Peng YU
	Lei XIA

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https://www.cjmr.org/EN/10.11901/1005.3093.2020.063 OR https://www.cjmr.org/EN/Y2020/V34/I8/605

Fig.1 XRD patterns of Cu_50-_xZr₄₆Al₄Dy_x(x=0~4)specimens with different diameters

Table 1 Structures of Cu_50-_xZr₄₆Al₄Dy_x(x=0, 1, 2, 3, 4) specimens with different diameters

Fig.2 Curves of (a) DSC and (b) DTA of Cu_50-_xZr₄₆Al₄Dy_x(x=0, 1, 2, 3) BMG with a diameter of 1.5 mm under the heating rate of 20 K/min

Table 2 Thermal parameters of Cu_50-_xZr₄₆Al₄Dy_x(x=0~4) BMG with a diameter of 1.5 mm

Fig.3 Compressive stress-strain curves of Cu_50-_xZr₄₆Al₄Dy_x(x=0~4)BMGs with a diameter of 1.5 mm at room temperature

Table 3 Compressive mechanical parameters of Cu_50-_xZr₄₆Al₄-Dy_x(x=0~4) BMGs_{with a diameter of 1.5 mm at room temperature}

Fig.4 Morphology of compressive fracture surfaces of Cu_50-_xZr₄₆Al₄Dy_x(x=0~4) BMGs with a diameter of 1.5 mm

Fig.5 Vickers hardness values of Cu_50-_xZr₄₆Al₄Dy_x(x=0~4) BMGs with diameters of 1.5 mm and 3 mm as a function of Dy concentration

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