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利用拉伸试验机分析了Fe-13Cr-2.5Mo阻尼合金的拉伸性能,用倒扭摆仪测试了该合金的阻尼性能,利用Fe3O4磁流体在光学显微镜下观察到Fe-13Cr-2.5Mo阻尼合金的磁畴及在磁场下磁畴结构的变化。实验表明,合金在900℃×1h退火,拉伸性能最好,抗拉强度为467MPa,伸长率达23%;在1100℃×0.5h退火,合金的阻尼性能最高,对数衰减率达0.16,但在该温度下随保温时间的延长,阻尼性能急剧下降。经过对合金加磁前后磁畴结构的观察发现,磁畴结构中楔形畴的产生是导致阻尼性能下降的重要原因。
The tensile properties of Fe-13Cr-2.5Mo damping alloy were analyzed by tensile testing machine. The damping properties of Fe-13Cr-2.5Mo damping alloy were tested by inverted torsion pendulum. Fe-13Cr-2.5Mo damping alloy was observed under light microscope with Fe3O4 magnetic fluid. Of the magnetic domain and the change of the magnetic domain structure under the magnetic field. Experiments show that the alloy annealed at 900 ℃ × 1h, the tensile properties of the best, the tensile strength of 467MPa, elongation of 23%; annealed at 1100 ℃ × 0.5h, the highest damping properties of the alloy, the logarithmic decrement of 0.16 , But at this temperature with the holding time extension, a sharp decline in damping performance. Through the observation of the magnetic domain structure before and after the addition of the alloy, it is found that the wedge-shaped domain in the magnetic domain structure is an important reason for the decrease of the damping performance.