等温退火对Fe60Co8Zr10Mo5W2B15大块非晶合金力学性能的影响
Effect of Isothermal Annealing on Mechanical Properties of Fe60Co8Zr10Mo5W2B15 Bulk Amorphous Alloy
陶平均1, 杨元政1, 赵德强1, 白晓军2
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作者单位：1. 广东工业大学 材料与能源学院, 广东 广州 510006; 2. 深圳大学 材料科学与工程学院, 广东 深圳 518060
中文关键字：大块非晶合金； 等温退火； 显微硬度； 应力-应变曲线； 抗压强度
英文关键字：bulk amorphous alloy; isothermal annealing; micro-hardness; stress-strain curve; compressive strength
中文摘要：通过铜模真空吸铸法制备出直径为2 mm的Fe60Co8Zr10Mo5W2B15非晶合金棒， 采用X射线衍射仪、示差扫描量热仪、 显微硬度仪及万能试验机， 研究了该非晶合金的结构和热稳定性及等温退火对其力学性能的影响。 结果表明， 该非晶合金的显微硬度、 抗压强度和相对应变率分别为1343 HV、 972.6 MPa和0.059 %； 在过冷液相区内退火，合金的显微硬度有所下降， 而高于晶化温度退火，合金的显微硬度增大， 显微硬度整体表现为随退火温度的升高逐渐增大的变化趋势； 压缩变形过程中合金只表现出弹性变形，随退火温度的升高， 合金抗压强度和相对应变率均逐渐下降。
英文摘要：Fe60Co8Zr10Mo5W2B15 bulk amorphous rod with a diameter of 2 mm was prepared by copper-mold vacuum suction casting. The microstructure and thermal stability of the amorphous alloy as well as the effects of isothermal annealing on its mechanical properties were studied by X-ray diffractometer, differential scanning calorimeter, micro-hardness instrument and universal testing machine. The results show that the micro-hardness, compressive strength and relative strain of the amorphous alloy is 1343 HV, 972.6 MPa and 0.059%, respectively. Isothermal annealing in the super-cooled liquid region will cause slight reduction in micro-hardness, while that above crystallization temperature will enhance the micro-hardness values. As a whole, with the increase of annealing temperature, the micro-hardness presents an upward trend. During the compression tests, the alloy samples exhibit only elastic deformation, and with the increase of annealing temperature, both compressive strength and relative strain of the alloy decrease gradually.