通过弯曲法测量、热循环训练、扫描电镜、X射线衍射等方法,研究了复合稀土对Fe Mn Si Ni C合金形状记忆效应的影响。研究结果表明,Fe Mn Si Ni C合金中加入复合稀土,能够明显细化合金的金相组织,显著提高合金的形状记忆效应,并使合金表...通过弯曲法测量、热循环训练、扫描电镜、X射线衍射等方法,研究了复合稀土对Fe Mn Si Ni C合金形状记忆效应的影响。研究结果表明,Fe Mn Si Ni C合金中加入复合稀土,能够明显细化合金的金相组织,显著提高合金的形状记忆效应,并使合金表现出微弱的双程记忆效应。试验结果还表明,第一种训练途径以及加入微量复合稀土是降低应力诱发ε马氏体稳定化行之有效的方法,X射线衍射结果表明,该训练方法有助于提高合金中ε→γ转变的ε逆转变率,对提高合金的记忆性能起积极的作用。展开更多
Effect of compound rare earth (RE) on shape memory effect (SME) of Fe-Mn-Si-Ni-C shape memory alloy was studied by bent measurement,thermal cycle training, SEM and XRD etc. The results show that metallurgic microstruc...Effect of compound rare earth (RE) on shape memory effect (SME) of Fe-Mn-Si-Ni-C shape memory alloy was studied by bent measurement,thermal cycle training, SEM and XRD etc. The results show that metallurgic microstructure is refined and SME improved evidently with the addition of compound RE. The alloy appears little two-way shape memory effect. The former training and addition of compound RE are two effective ways to restrain martensitic stability. XRD analysis also indicates that ε→γ reversible transition ratio increases by training greatly help to improve SME of the alloy.展开更多
Effect of carbon, compound RE, quenching temperature, pre-strain and recovery temperature on shape memory effect (SME) of Fe-Mn-Si-Ni-C-RE shape memory alloy was studied by bent measurement, thermal cycle training, SE...Effect of carbon, compound RE, quenching temperature, pre-strain and recovery temperature on shape memory effect (SME) of Fe-Mn-Si-Ni-C-RE shape memory alloy was studied by bent measurement, thermal cycle training, SEM etc. It was shown that the grains of alloys addition with compound RE became finer and SME increased evidently. SME of the alloy was weakening gradually as carbon content increased under small strain (3%). But in the condition of large strain (more than 6%), SME of the alloy whose carbon content range from 0.1% to 0.12% showed small decreasing range, especially of alloy with the addition of compound RE. Results were also indicated that SME was improved by increasing quenching temperature (>1000℃). The amount of thermal induced martensite increased and the relative shape recovery ratio could be increased to more than 40% after 3-4 times thermal training. The relative shape recovery ratio decreased evidently depending on rising of pre-strain. Furthermore, because speed of martensite transition was extremely great under higher tempering temperature (more than 450℃, ε → γ transition completed in 10s meanwhile the relative shape recovery ratio of the alloy increased rapidly.展开更多
Effect of chemical component on shape memory effect (SME) of Fe-Mn-Si-Ni-C-RE shape memory alloys was studied by bent measurement, thermal cycle training, SEM etc. Results of study indicate that the alloys with high M...Effect of chemical component on shape memory effect (SME) of Fe-Mn-Si-Ni-C-RE shape memory alloys was studied by bent measurement, thermal cycle training, SEM etc. Results of study indicate that the alloys with high Mn content (25%) appeare better SME, especially in lower strain. SME improves evidently when Si is higher content, especially it’s range from 3% up to 4%. But brittleness of Fe-Mn-Si-Ni-C-RE alloy increases by increasing the Si content. SME of the alloy is weakening gradually as carbon content increases under small strain (3%). But in the condition of large strain (above 6%), SME of the alloy whose carbon content ranges from 0.1 % to 0.12% shows small decreasing range, especially of alloy with the addition of compound RE.展开更多
Effect of chemical component on shape memory effect (SME) of Fe-Mn-Si-Ni-C-REshape memory alloys was studied by bent measurement, thermal cycle training, SEM etc. Results ofstudy indicate that the alloys with high Mn ...Effect of chemical component on shape memory effect (SME) of Fe-Mn-Si-Ni-C-REshape memory alloys was studied by bent measurement, thermal cycle training, SEM etc. Results ofstudy indicate that the alloys with high Mn content (25%) appeare better SME, especially in lowerstrain. SME improves evidently when Si is higher content, especially it's range from 3% up to 4%.But brittleness of Fe-Mn-Si-Ni-C-RE alloy increases by increasing the Si content. SME of the alloyis weakening gradually as carbon content increases under small strain (3%). But in the condition oflarge strain (above 6%), SME of the alloy whose carbon content ranges from 0.1 % to 0.12% showssmall decreasing range, especially of alloy with the addition of compound RE.展开更多
文摘通过弯曲法测量、热循环训练、扫描电镜、X射线衍射等方法,研究了复合稀土对Fe Mn Si Ni C合金形状记忆效应的影响。研究结果表明,Fe Mn Si Ni C合金中加入复合稀土,能够明显细化合金的金相组织,显著提高合金的形状记忆效应,并使合金表现出微弱的双程记忆效应。试验结果还表明,第一种训练途径以及加入微量复合稀土是降低应力诱发ε马氏体稳定化行之有效的方法,X射线衍射结果表明,该训练方法有助于提高合金中ε→γ转变的ε逆转变率,对提高合金的记忆性能起积极的作用。
文摘Effect of compound rare earth (RE) on shape memory effect (SME) of Fe-Mn-Si-Ni-C shape memory alloy was studied by bent measurement,thermal cycle training, SEM and XRD etc. The results show that metallurgic microstructure is refined and SME improved evidently with the addition of compound RE. The alloy appears little two-way shape memory effect. The former training and addition of compound RE are two effective ways to restrain martensitic stability. XRD analysis also indicates that ε→γ reversible transition ratio increases by training greatly help to improve SME of the alloy.
文摘Effect of carbon, compound RE, quenching temperature, pre-strain and recovery temperature on shape memory effect (SME) of Fe-Mn-Si-Ni-C-RE shape memory alloy was studied by bent measurement, thermal cycle training, SEM etc. It was shown that the grains of alloys addition with compound RE became finer and SME increased evidently. SME of the alloy was weakening gradually as carbon content increased under small strain (3%). But in the condition of large strain (more than 6%), SME of the alloy whose carbon content range from 0.1% to 0.12% showed small decreasing range, especially of alloy with the addition of compound RE. Results were also indicated that SME was improved by increasing quenching temperature (>1000℃). The amount of thermal induced martensite increased and the relative shape recovery ratio could be increased to more than 40% after 3-4 times thermal training. The relative shape recovery ratio decreased evidently depending on rising of pre-strain. Furthermore, because speed of martensite transition was extremely great under higher tempering temperature (more than 450℃, ε → γ transition completed in 10s meanwhile the relative shape recovery ratio of the alloy increased rapidly.
文摘Effect of chemical component on shape memory effect (SME) of Fe-Mn-Si-Ni-C-RE shape memory alloys was studied by bent measurement, thermal cycle training, SEM etc. Results of study indicate that the alloys with high Mn content (25%) appeare better SME, especially in lower strain. SME improves evidently when Si is higher content, especially it’s range from 3% up to 4%. But brittleness of Fe-Mn-Si-Ni-C-RE alloy increases by increasing the Si content. SME of the alloy is weakening gradually as carbon content increases under small strain (3%). But in the condition of large strain (above 6%), SME of the alloy whose carbon content ranges from 0.1 % to 0.12% shows small decreasing range, especially of alloy with the addition of compound RE.
文摘Effect of chemical component on shape memory effect (SME) of Fe-Mn-Si-Ni-C-REshape memory alloys was studied by bent measurement, thermal cycle training, SEM etc. Results ofstudy indicate that the alloys with high Mn content (25%) appeare better SME, especially in lowerstrain. SME improves evidently when Si is higher content, especially it's range from 3% up to 4%.But brittleness of Fe-Mn-Si-Ni-C-RE alloy increases by increasing the Si content. SME of the alloyis weakening gradually as carbon content increases under small strain (3%). But in the condition oflarge strain (above 6%), SME of the alloy whose carbon content ranges from 0.1 % to 0.12% showssmall decreasing range, especially of alloy with the addition of compound RE.
