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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Microstructure and mechanical properties of Y2O3 reinforced Ti6Al4V composites fabricated by spark plasma sintering
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Microstructure and mechanical properties of Y2O3 reinforced Ti6Al4V composites fabricated by spark plasma sintering

机译：由火花等离子烧结制造的Y2O3增强Ti6A14V复合材料的微观结构和力学性能

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摘要

The paper presents the fabrication of (0.6-3.0 wt%) Y2O3-Ti6Al4V composites by spark plasma sintering (SPS) with the sintering heating rate of 100 degrees C/min and the sintering temperature of 900 degrees C. Ti6Al4V powders and Y2O3 powders were admixed by rocking mill for 8 h at 30 Hz. Scanning electron microscopy (SEM) equipped with complete energy dispersive spectrometer (EDS) and X-ray diffraction (XRD) were used to characterize the as-received Ti6Al4V powders, Y2O3 powders, the admixed composite powders and the sintered samples. The microhardness, the compressive yield strength and the ultimate strength of as-sintered samples at room temperature were enhanced up to 464.1HV, 1346 MPa and 1583 MPa respectively with a plastic strain of 19.1%, when 2.0 wt% Y2O3 was introduced. The mechanical behaviors of 2.0 wt% Y2O3-Ti6Al4V composite at 450 degrees C were also carried out with the yield strength of 832 MPa and the ultimate strength of 1088MPa. Compared with the sintered Ti6Al4V, the 2.0 wt% Y2O3-Ti6Al4V composite has higher yield strength and ultimate strength at elevated temperature with the increment of 54% and 37%, respectively. The mode of fracture was transformed from ductile fracture to a combination of ductile and brittle fractures with the increase of Y2O3 content. (C) 2018 Elsevier B.V. All rights reserved.
机译：本文提出了通过火花等离子体烧结（SPS）的制备（0.6-3.0wt％）Y2O3-Ti6A14V复合材料，其烧结加热速率为100℃/ min，烧结温度为900℃。Ti6Al4V粉末和Y2O3粉末在30 Hz的摇摆轧机混合8小时。扫描电子显微镜（SEM）配备完全能量色散光谱仪（EDS）和X射线衍射（XRD），用于表征接收的Ti6Al4V粉末，Y2O3粉末，混合复合粉末和烧结样品。当引入2.0wt％的Y 2 O 3时，微硬度，在室温下，在室温下的烧结样品的烧结屈服强度和烧结样品的最终强度分别增强了464.1HV，1346MPa和1583MPa，当引入2.0wt％的Y 2 O 3时，塑性应变为19.1％。 450℃下2.0wt％Y2O3-Ti6Al4V复合材料的机械行为也与屈服强度为832MPa和1088MPa的最终强度进行。与烧结的Ti6Al4V相比，2.0wt％的Y 2 O 3-Ti6Al4V复合材料在升高的温度下具有较高的屈服强度和极限强度，同时分别为54％和37％。随着Y2O3含量的增加，从延性骨折转化到延性和脆性骨折的组合中的裂缝。 （c）2018年elestvier b.v.保留所有权利。

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