Zr基块体非晶合金的成分设计及其性能研究

doi:10.11896/cldb.20090247

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Abstract Zr-Cu-Ni-Al amorphous alloy compositions are designed according to binary eutectic mixing method, and are prepared by copper mold suction casting method. XRD, DSC, SEM and quasi-static compression tests were utilized to research the amorphous forming ability and mechanical properties of Zr-Cu-Ni-Al alloys. The results show that the designed Zr-Cu-Ni-Al alloys are completely amorphous structure, and their supercooled liquid region (ΔT_x) exceeds 65 K, and they have good amorphous forming ability. Among them, Zr_55.7Cu_22.4Ni_7.2Al_14.7 alloy has the widest ΔT_x, reaching 82 K. The plastic deformation ability of the alloys from low to high is: Zr₅₇Cu_18.67Ni₈Al_16.33, Zr_56.36Cu_20.53Ni_7.6Al_15.51, Zr_54.4-Cu_26.13Ni_6.4Al_13.07 and Zr_55.7Cu_22.4Ni_7.2Al_14.7. The plasticity of Zr_55.7Cu_22.4Ni_7.2Al_14.7 alloy reaches 5.5%, and the compressive strength reaches 1 885 MPa, while the plasticity of the other three alloys is less than 2%. The stronger the initiation and interaction of the shear bands, the higher the plasticity and strength of Zr-Cu-Ni-Al bulk amorphous alloys. There are droplets in the fracture of the alloy samples, which indicates that during the deformation of the alloys, the alloy structure at the fracture has viscous flow, accompanied by the generation of vein patterns. The serration rheology occurs in all alloys during plastic deformation, and the serration rheology is closely related to the change of free volume.

Key words： amorphous alloy composition design plastic deformation shear band serrated flow

Published: 25 December 2021 Online: 2021-12-27

CLC number:

TG146.1

Fund:This work was financially supported by the National Natural Science Foundation of China(51201038), Guangdong Natural Science Foundation(2015A030313488) and Guangzhou Science and Technology Plan Project(201607010052).

About author: Kunsen Zhu, master of engineering at School of Mate-rials and Energy, Guangdong University of Technology, graduated from Zhengzhou University of Aeronautics in June 2018 with a bachelor's degree in engineering. His research direction is advanced metal materials.

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	ZHU Kunsen
	TAO Pingjun
	ZHANG Chaohan
	CHEN Yugan
	ZHANG Weijian
	YANG Yuanzheng

Cite this article:

ZHU Kunsen,TAO Pingjun,ZHANG Chaohan, et al. Composition Design and Properties of Zr-based Bulk Amorphous Alloys[J]. Materials Reports, 2021, 35(24): 24113-24116.

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http://www.mater-rep.com/EN/10.11896/cldb.20090247 OR http://www.mater-rep.com/EN/Y2021/V35/I24/24113

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