欧阳晟,杨延清

• 1:西北工业大学材料学院

摘要(Abstract)：

通过透射电镜观察了Ni_(54)Mn_(25)Ga_(21)磁性形状记忆合金中A-D马氏体变体对的晶体学特征。结果表明:微米级的单个马氏体变体由纳米级的粗、细两种片层组成,这两种片层呈(1 1 2)复合型孪晶关系。变体对之间任意两片层的取向关系随着细片层所占变体的体积分数变化而改变,粗-粗(或细-细)片层对的取向关系接近于相同,粗-细片层对的取向关系接近于(1 1 2)孪晶关系。此外,沿着片层的<11 0>方向观察,变体间界面位于竖立位置,界面弯曲。界面处片层之间存在一定交叉,交叉的区域在10 nm以内。

关键词(KeyWords)： Ni-Mn-Ga合金;纳米孪晶;A-D变体对;取向关系

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51071125,51271147,51201134,51201135)

作者(Author): 欧阳晟,杨延清

DOI: 10.13289/j.issn.1009-6264.2017-0160

参考文献(References)：

• [1]Soderberg O,Ge Y,Sozinov A,et al.Recent breakthrough development of the magnetic shape memory effect in Ni-Mn-Ga alloys[J].Smart Materials and Structures,2005,14:S223-S235.
• [2]Ullakko K,Huang J K,Kantner C,et al.Large magnetic-field-induced strains in Ni2Mn Ga single crystals[J].Applied Physics Letters,1996,69(13):1966-1968.
• [3]Allenstein U,Selle S,Tadsen M,et al.Coupling of metals and biominerals:characterizing the interface between ferromagnetic shape-memory alloys and hydroxyapatite[J].ACS Applied Materials&Interfaces,2015,7(28):15331-15338.
• [4]Pons J,Chernenko V A,Santamarta R,et al.Crystal structure of martensitic phases in Ni-Mn-Ga shape memory alloys[J].Acta Materialia,2000,48(12):3027-3038.
• [5]Li Z B,Yang B,Zhang Y D,et al.Crystallographic insights into the inter-martensitic transformation in Ni-Mn-Ga alloys[J].Acta Materialia,2014,74:9-17.
• [6]Li Z B,Zhang Y D,Esling C,et al.Evidence for a monoclinic incommensurate superstructure inmodulated martensite[J].Acta Materialia,2012,60:6982-6990.
• [7]Miyazaki S,Otsuka K.Development of shape memory alloys[J].ISIJ International,1989,29(5):353-377.
• [8]Schroeder T A,Wayman C M.The formation of martensite and the mechanism of the shape memory effect in single crystals of Cu-Zn alloys[J].Acta Metallurgica,1977,25:1375-1391.
• [9]Han M,Bennett J C,Gharghouri M A,et al.Microstructure characterization of the non-modulated martensite in Ni-Mn-Ga alloy[J].Materials Characterization,2008,59:764-768.
• [10]Bilby B A,Crocker A G.The theory of the crystallohraphy of deformation twinning[J].Proceedings of the Royal Society of London Series A,1965,288(1413):240-255.
• [11]Zhang J X,Zheng Y F,Huang B M,et al.Characteristics of the A/D type twin boundary in 18R martensite in a Cu-Zn-Al alloy[J].Materials Science and Engineering A,1998,251:150-156.
• [12]Ge Y,Jiang H,Sozinov A,et al.Crystal structure and macrotwin interface of five-layered martensitein Ni-Mn-Ga magnetic shape memory alloy[J].Materials Science and Engineering A,2006,440:961-964.
• [13]Szczerba M J,Chulist R.Detwinning of a non-modulated Ni-Mn-Ga martensite:from self-accommodated microstructure to single crystal[J].Acta Materialia,2015,85:67-73.
• [14]Christian J W,Mahajan S.Deformation twinning[J].Progress in Materials Science,1995,39(1):1-157.
• [15]Zhu Y T,Liao X Z,Wu X L.Deformation twinning in nanocrystalline materials[J].Journal of Materials Engineering and Performance,2005,14(4):467-472.

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