發(fā)布時間：2019-05-23 01:48

【摘要】：為使記憶合金展現(xiàn)寬溫域高阻尼特性,采用熔煉、熱鍛、軋制等手段制備原位自生的NbTi-NiTi記憶合金復合材料。借助NbTi對NiTi的約束,拓寬NiTi相變溫度區(qū)間,獲得寬溫域相變阻尼。采用LMR-1低頻力學弛豫譜測試機測試樣品內耗。完全相變測試結果表明:材料能在很寬的溫度范圍內展現(xiàn)高阻尼特性,并隨著預變形量的增加,馬氏體逆相變阻尼峰的峰溫隨之升高,峰寬也隨之增加;預變形后,樣品在第一次加熱過程中阻尼峰的峰溫較高,且峰較寬,而第二次加熱,阻尼峰溫和寬度都明顯降低;測試中材料的動態(tài)模量也伴有相同的變化。不完全相變測試結果表明:內耗曲線出現(xiàn)雙阻尼峰,而動態(tài)模量曲線出現(xiàn)階梯式升高現(xiàn)象,且內耗曲線和動態(tài)模量曲線都展現(xiàn)出溫度記憶效應。
[Abstract]:In order to make the memory alloy exhibit high damping characteristics in wide temperature range, in situ NbTi-NiTi memory alloy composites were prepared by melting, hot forging and rolling. With the help of NbTi constraint on NiTi, the phase transition temperature range of NiTi is broadened and the phase transition damping in wide temperature region is obtained. The internal friction of the sample was measured by LMR-1 low frequency mechanical relaxation spectrum tester. The results of complete transformation test show that the material can show high damping characteristics in a wide temperature range, and with the increase of predeformation, the peak temperature and peak width of the damping peak of maraging inverse transformation increase. After pre-deformation, the peak temperature of damping peak is higher and wider in the first heating process, while the temperature and width of damping peak decrease obviously in the second heating process, and the dynamic modulus of the material is also accompanied by the same change. The results of incomplete phase transition test show that the internal friction curve shows double damping peak, while the dynamic modulus curve increases step by step, and both the internal friction curve and the dynamic modulus curve show the temperature memory effect.
【作者單位】： 江西省科學院江西省銅鎢新材料重點實驗室;中國石油大學(北京)材料科學與工程學院;
【基金】：國家自然科學基金資助項目(51231008,11474362,51401240,51471187,51401096,51601001) 江西省科學院引進博士項目(2013-YYB-5);江西省科學院普惠制項目(2013-XTPH1-33)~~
【分類號】：TB331;TG139.6

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