张明,张欣,刘庆锁.Ni-Mn-Ga-V高温形状记忆合金研究[J].稀有金属材料与工程,2019,48(9):2794~2798.[Ming Zhang,Xin Zhang,Qingsuo Liu.Study of Ni-Mn-Ga-V high-temperature shape memory alloys[J].Rare Metal Materials and Engineering,2019,48(9):2794~2798.]
Ni-Mn-Ga-V高温形状记忆合金研究
投稿时间:2018-03-06??修订日期:2018-04-03
中文关键词:??高温形状记忆合金??Ni-Mn-Ga合金??形状记忆效应??马氏体相变
基金项目:
中文摘要:
??????本文采用光学显微镜、X射线衍射仪、扫描电子显微镜、透射电子显微镜以及压缩力学试验机系统的研究了钒元素对(Ni56Mn25Ga19)100-xVx (x = 0, 1, 3) (at.%)高温形状记忆合金性能的影响。结果表明,由于钒取代方法的不同,我们所研究合金的组织结构和某些性能与已报到的Ni56Mn25Ga19-xVx合金差异较大。未掺杂钒元素时,试验合金由单相非调制四方结构马氏体构成,当钒含量为1at.%和3at.%时,合金由四方结构马氏体和竹叶状γ相构成。随着钒含量的增加,γ相的数量增多,但其尺寸和形状保持不变。钒掺杂改善合金的力学性能和形状记忆效应。 (Ni56Mn25Ga19)99V1合金变形10%后加热,可以得到6.7%的可逆应变。
Study of Ni-Mn-Ga-V high-temperature shape memory alloys
英文关键词:High-temperature shape memory alloys??Ni-Mn-Ga alloys??Shape memory effect??Martensitic transformation
英文摘要:
??????In this paper, the effect of V elememt addition on the properties of a (Ni56Mn25Ga19)100-xVx (x = 0, 1, 3) (at.%) high-temperature shape memory alloys was investigated by optical microscopy, X-ray diffraction, scanning electron microscopy, transmission electron microscopy and compression test. The results show that the microstructure and some properties of our alloys are very different from that of the reported Ni56Mn25Ga19-xVx alloy due to the V substitution method difference. Single phase of non-modulated martensite with tetragonal structure is observed for the undoped alloy, and dual-phase structure which is consisted of tetragonal martensite and bamboo leaf shaped γ phase is present for x=1 and 3. With increasing V content, the amount of γ phase increases, while the size and shape of γ phase keep unchanged. V addition enhances the mechanical properties and shape memory effect. The reversible strain of 6.7% is obtained in the (Ni56Mn25Ga19)99V1 alloy under pre-strain of 10% after heating.
作者单位E-mail
张明?天津理工大学 材料科学与工程学院?1509601834@qq.com?
张欣?天津理工大学 材料科学与工程学院?zhangxin3510110@126.com?
刘庆锁?天津理工大学 材料科学与工程学院??
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