【摘要】 利用倒扭摆仪对比研究了Fe-17.5Mn二元合金和Fe-17.5Mn-0.3Mm(富铈混合稀土)合金的阻尼性能,并借用Olympus显微镜观察分析了合金的微观组织。研究结果表明,在1000℃保温1h后水淬状态下,Fe-17.5Mn-0.3Mm合金的阻尼性能明显优于Fe-17.5Mn二元合金。在微量稀土元素的作用下,Fe-17.5Mn-0.3Mm合金中相对于Fe-17.5Mn二元合金其马氏体数量较多、板条较细薄,板条变薄且单位体积内界面面积增加,使振动的微观阻尼源增多,导致阻尼性能提高。更多还原

【Abstract】 The damping capacity of the Fe-17.5Mn and Fe-17.5Mn-0.3Mm(rare-earths) alloys was measured by reversal torsion device.The microstructure was observed with the Olympus optical microscope.The results show that the damping capacity of Fe-17.5Mn-0.3Mm is obviously higher than that of Fe-17.5Mn binary alloy after quenched at 1000℃ for 1h.Addition of 0.3% mass fraction rare-earth elements results in more and thinner martensites in the Fe-17.5Mn-0.3Mm alloy.The more areas of the γ/ε interface and ε-martensite variant boundary in unit volume bring more microstructural damping resources on vibration,thus improving the damping capacity of Fe-17.5Mn-0.3Mm.更多还原