摘要
用静电音频内耗仪测量了 Fe- 30 .3Mn- 6 .1Si,Fe- 2 9.0 5 Mn- 6 .2 7Si- RE,Fe- 2 6 .4Mn- 6 .0 2 Si- 5 .2 Cr形状记忆合金在 15 0～ 6 0 0 K温度范围的内耗及模量变化 ,确定了三种合金的 TN 温度及 MS温度 ,通过计算 ε→ γ相变内耗峰的面积 ,研究了奈尔温度 TN 对 γ→ ε马氏体相变的影响 .结果表明 :合金成分显著地影响 TN 温度 ,其中 RE和 Cr均降低 TN 温度 .随着 TN 温度的降低 ,MS- TN 温度差增大 ,TN 温度对马氏体相变的抑制作用降低 ,使马氏体形成量增加 ,进而使 ε→ γ相变峰的面积即逆相变量增大 .
Internal friction and elastic modulus of three shape memory alloys, Fe 30 30Mn 6 10Si, Fe 29.05Mn 6.27Si 0.024RE, Fe 26.40Mn 6.02Si 5.20Cr, were measured as a function of temperature from 150 to 600 K using an electrostatic audio frequency internal friction instrument. The Neel temperature T N and M S temperature of these alloys were determined. By calculating the area covering of the internal friction peak of the ε→γ transformation, effects of the Neel temperature T N on the γ→ε martensitic transformation were investigated. The results show that alloy compositions evidently affect the T N temperature, and rare earth elements and Cr reduce the T N temperature. With the decrease of the T N temperature and the increase of M S-T N , the repressive effect of the T N temperature on the γ→ε martensitic transformation decreases, and the amount of the martensitic ε phase and the area of the internal friction peak of the ε→γ transformation increase.
出处
《上海大学学报（自然科学版）》
CAS
CSCD
2000年第3期189-193,共5页
Journal of Shanghai University:Natural Science Edition
基金
国家自然科学基金资助项目! (编号 :5 96710 2 3 )
关键词
FE-MN-SI基合金
奈尔温度
相变
形状记忆合金
Fe Mn Si based alloy
Neel temperature (T N)
martensitic transformation
internal friction
