【摘要】 研究了热机械循环训练对不同淬火态Fe-18Mn-5Si-8Cr-4Ni记忆合金形状记忆效应的影响。结果表明:当热机械循环训练工艺为4.33%变形加923K中间退火时,合金在淬火温度分别为1023K和1123K时的形状回复率都随循环次数的增加而增加。在淬火温度分别为923K和1323K时,合金的形状回复率随循环次数的增加达到最大值后将随次数的增加而下降(923K淬火达到最大值的次数为3次,1323K淬火时为2次)。但是当在1123K淬火时,训练后合金的形状回复率最高,达到88%;在1323K淬火时,训练的效果最显著,最大值比训练前提高了68%;淬火温度为923K时,热机械循环训练的效果最不显著,最大值仅比训练前提高了11%。更多还原

【Abstract】 The effect of thermal-mechanical cycle on shape memory effect of Fe-18Mn-5Si-8Cr-4Ni shape memory alloy has b een studied.The results show that the shape recovery ratio at quench ing temperature 1023K or 1123K increases as the cycle number increa ses,when the technique of thermal-mechanical cycle is 4.33% deformatio n and 923K middle annealing.The shape recovery ratio at 923K or 1323 K also increases with increasing the cycle number,when the number is lower than 3 and 2,respectively.A maximum value can be attained at 3 and 2 respectively. With the further increase in the cycle numbe r,the shape recovery ratio will decrease.However,a maximum shape recover y ratio,88%,can be attained through the thermal-mechanical cycle,when the quenching temperature is 1123K; when the temperature is 1323K,the e ffect of the cycle on shape recovery ratio is the greatest,the maximu m value after the cycle is higher 68% than the value before the cy cle;when the quenching temperature is 923K,the effect of the cycle on shape recovery ratio is the lowest, the maximum value after thermal- mechanical cycle is higher only 11% than the value before the cycle.更多还原