Fatigue Behavior of A Minor Yttrium Doped ZrCuNi-Based Metallic Glass Alloy Fabricated by Industrial Grade Raw Material
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MRS Advances © 2020 Materials Research Society DOI: 10.1557/adv.2020.138
Fatigue Behavior of A Minor Yttrium Doped ZrCuNi-Based Metallic Glass Alloy Fabricated by Industrial Grade Raw Material Shichao Zhou1, Tao Zhang2, Min Zhang3, and Yong Zhang1 1 The State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, No. 30, Xueyuan Road, Beijing 100083, China
2 The School of Electromechanical Engineering, Guangdong University of Technology, Guangzhou City, Guangdong Province 510006, PR China
3 Luoyang Advanced Manufacturing Industrial R&D Center Tianjin Research Institute for Advanced Equipment, Tsinghua University
*Corresponding author: Yong Zhang ([email protected])
ABSTRACT The fatigue behavior of a low-cost Zr52.1Ti5Cu17.9Ni14.6Al10Y0.4 (at%) (ZrCuNi-based) bulkmetallic glass (BMG) prepared by industrial-grade material was investigated under threepoint bending loading modes. In order to obtain the fatigue stress-life (S-N) data, stresscontrolled experiments were conducted using a computer-controlled material test system electrohydraulic testing machine at 60 Hz with a 0.1 R ratio in the air at room temperature. The fatigue limit (~174 MPa) in stress amplitude and fatigue ratio (~0.14) of this BMG is comparative to the similar BMG (Vit-105) prepared by high pure raw materials. The crack initiated from inclusions near the rectangular corners at the outer surface of the rectangular beam due to stress concentration. The striations and vein-like patterns were observed in the crack propagation region and fast fracture region, respectively.
INTRODUCTION: Bulk metallic glasses (BMGs) have been regarded as promising structural materials for lots of years due to their unique structures and excellent properties [1,
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2]. Zr-based BMGs have shown high glass-forming ability and unique properties [3]. However, the Zr-based BMGs are not still widely applied in engineering fields. The major limitations of the Zr-based MBGs are the cost and the corresponding service behavior [3]. It is difficult to meet the industrialization application requirement with the high-cost of raw materials. With regard to lowering the cost for BMGs, Zhang et al. [4-7] founded the low-cost BMGs, which were prepared with industrialgrade sponge Zr by introducing a small amount of rare earth element. Recently, a low-cost Zr52.1Ti5Cu17.9Ni14.6Al10Y0.4 (at%) (ZrCuNi-based) BMG was successively designed and fabricated by high-pressure die casting with industrial-grade sponge Zr material with minor Y addition [8]. However, the fatigue behavior of the Zr52.1Ti5Cu17.9Ni14.6Al10Y0.4 BMG noted above has not been reported so far. To our best knowledge, for potential engineering applications, the fatigue fracture accounts for most of the service failures and approximately 90 percent of all service
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