【摘要】 采用倒扭摆内耗测试仪研究了Si对Fe-Cr-Al减振合金阻尼性能的影响结果表明：在Fe—Cr—Al中添加少量Si（质量分数约为1％）或以Si代替Al并经1273K及以下温度退火后，合金的阻尼性能（对数衰减率）优于Fe—Cr—Al，但经1273K以上温度退火后，阻尼性能不及Fe—Cr—Al；以少量Si代替Fe—Cr—Al中少量Al并经1373K以上温度退火空冷后，合金的阻尼性能比Fe—Cr—Al提高近70％，其机制仍是由磁畴壁的不可逆移动引起的磁机械滞后所决定.更多还原

【Abstract】 The effect of silicon on the damping capacity of Fe-Cr-Al alloy has beeninvestigated with the inverted torsion pendulum teclmiques. The results indicate that, smallamount silicon (app. 1% mass fraction) addition to Fe-Cr-Al or substitution of silicon foraluminum in Fe-Cr-Al alloy can make the damping capacity of the alloys higher than that ofFe-Cr-Al alloy when annealed below 1273 K; substituting silicon for small amount aluminum inFe-Cr-Al, the damping capacity of the alloy is much higher than that of Fe-Cr-Al alloy whenannealed above 1373 K followed by air cooling. The curves of logajrithmic decrement versus strainamplitude reveal the damping of the alloys resulting mainly from magonetomechanical hystereses.更多还原