NiTi-Nb原位复合材料的准线性超弹性变形 |
姜江, 郝世杰, 姜大强, 郭方敏, 任洋, 崔立山 |
Quasi-Linear Superelasticity Deformation in an In Situ NiTi-Nb Composite |
JIANG Jiang, HAO Shijie, JIANG Daqiang, GUO Fangmin, REN Yang, CUI Lishan |
图9 样品预变形示意图,预变形后样品内部应力分布示意图,B2-NiTi母相在每次加载前的衍射峰半高宽值和残余应变,及预变形后再次加载过程中马氏体相变从界面向NiTi芯部推进示意图 |
Fig.9 State evolution diagrams of samples during the tensile loading after a pre-deformation (a) schematic of the pre-deformation process (NW—nanowire) (b) schematic of stress distribution inside the specimen after pre-deformation (σ—stress) (c) full width half maximum (FWHM) values and residual tensile lattice strains of B2-NiTi at the beginning of each loading process, where the increase of FWHM indicates that the stress distribution in B2-NiTi becomes more unequal, and the increase of residual tensile lattice strain indicates the increasing of coupling tensile stress in B2-NiTi (d) schematic of martensitic transformation process which starts near the NiTi/Nb interface and then gradually moves to the core of B2-NiTi when loading a pre-deformed specimen |
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