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研究在93WNiFe合金中添加相同质量分数、不同粉末粒度的LaNi3合金粉末,LaNi3粉末粒度对合金准静态拉伸与动态压缩力学行为的影响。实验结果表明,稀土元素La在合金中主要以氧化物形式存在,氧化物尺寸随LaNi3粉末粒度的减小而减小;准静态拉伸条件下,随LaNi3粉末粒度由46.4μm减小至1.6μm,合金屈服和抗拉强度分别由612和927 MPa提高至630和945 MPa,延伸率则由27.5%下降至23.5%,延伸率变化幅度(约17%)明显大于强度变化幅度(约3%);动态压缩条件下(应变率约4500 s-1),随LaNi3粉末粒度由46.4μm减小至1.6μm,合金流动应力整体呈上升趋势,最大流动应力由1753 MPa提高至1810 MPa。
The effects of LaNi3 powder and LaNi3 powder particle size on the quasi-static tensile and dynamic compressive behaviors of 93WNiFe alloy with the same mass fraction and different particle sizes were investigated. The experimental results show that the rare earth element La exists mainly in the form of oxide in the alloy and the oxide size decreases with the decrease of the particle size of LaNi3 powder. With the quasi-static stretching, the particle size of LaNi3 decreases from 46.4μm to 1.6μm , The yield strength and tensile strength of the alloy increased from 612 and 927 MPa to 630 and 945 MPa respectively, while the elongation decreased from 27.5% to 23.5%. The elongation variation range (about 17%) was significantly greater than the strength change range (about 3%). The dynamic stress-strain ratio (about 4500 s-1) decreases with increasing LaNi3 particle size from 46.4 μm to 1.6 μm. The overall flow stress increases with the increase of the maximum flow stress from 1753 MPa to 1810 MPa.