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利用透射电镜和高分辨电镜系统地研究了Ｔｉ36Ｎｉ49Ｈｆ15合金的显微组织与相结构、热致马氏体形貌、亚结构、马氏体变体间的组织结构和界面结构结果表明，固溶处理Ｔｉ(３６)Ｎｉ(４９)Ｈｆ(１５)合金的室温组织由马氏体基体和呈球状与多边形状的（ＴｉｘＨｆ(１－ｘ)）２Ｎｉ第二相粒子组成．马氏体相为单斜Ｂ１９’结构，点阵常数为：α＝０．２４５４ｎｍ，ｂ＝０４０８７ｎｍ，ｃ＝０．４７９１ｎｍ；）β＝９９．３２°．Ｔｉ(３６)Ｎｉ(４９)Ｈｆ(１５)合金的热形成马氏体变体间构成典型的自协作组态观察到的有矛头状、嵌镶块状和楔状三种形态马氏体变体其亚结构为（００１）复合李晶．矛头状和嵌镶块状马氏体变体之间互成（０１１）Ⅰ型、＜０１１＞Ⅱ型孪晶关系，在这些变体内部还存在与其呈（１１１）Ⅰ型孪晶关系的楔状小变体．（０１１）Ⅰ型孪品界面比较平直、共格性好、界面两侧原子相对（０１１）面呈镜面对称；＜０１１＞Ⅱ型孪晶界面呈现缓慢弯曲的特征；（１１１）Ⅰ型孪晶界面呈波浪形结构
The microstructure and phase structure of Ti36Ni49Hf15 alloy were investigated systematically by TEM and high resolution electron microscopy. The microstructures and interfacial structure of the thermally induced martensite, substructure and martensite were studied. The results show that the solution treatment The room-temperature microstructure of the Ti (36) Ni (49) Hf (15) alloy consists of a martensite matrix and second phase particles (TixHf (1-x)) 2Ni in spherical and polygonal shapes. The martensite phase is a monoclinic B19 ’structure with lattice constants of: α = 0.2454 nm, b = 04087 nm, c = 0.4791 nm;) β = 99.32 °. Thermal formation of Ti (36) Ni (49) Hf (15) alloys constitute three typical morphological martensitic morphologies of lanceoped, mosaic lumps and wedges The substructure is (001) composite Li Jing. (011) Ⅰ and <011> Ⅱ types of twinning between spearhead and mosaic massive martensite, and the wedge-shaped Small variant. The (011) I-type twin has a relatively flat interface with good coexistence. The (011) plane on both sides of the interface is mirror symmetrical. The <011> II twin interface presents a slowly curved feature. Crystal interface was wavy structure