Interphase Boundary Structure and Transformation Mechanism of Phase Transformations in Solids

固体相变的相间边界结构和转变机制

• 批准号: 06452312
• 负责人: MAKI Tadashi
• 金额: $ 3.71万
• 依托单位: KYOTO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1994
• 资助国家: 日本
• 起止时间: 1994 至 1995
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-06452312/
• 关键词: diffusional transformation; martensitie transformation; precipitation; ledge mechanism; interphose boundary structure; crystallography; lattice correspondance; ベイナイト変態; 異面構造

The atomic structure of the interphase boundaries enclosing the products of diffusional transformations (precipitation) and martensitic transformations was examined by means of conventional and high-resolution transmission electron microscopy. The interphase boundaries enclosing the precipitates plate and the martensite plate are both semi-coherent. Thus, in each type of phase transformations, an atomic site correspondence is maintained. In diffusional transformations (precipitation) , the nucleation and migration of growth ledges, which are controlled by diffusion of substitutional solute atoms, result in the vitual displacement of transformation dislocations. It also accompanies the climb of sessile misfit dislocations and the glide of glissile accommodation dislocations simultaneously. Thus, the migration of the precipitate/matrix boundary is a non-conservative process. On the other hand, theinterphase boundary between the martensite and the matrix is fully glissile and, thus, can move conservatively.

通过传统和高分辨率透射电子显微镜检查了包围扩散转变（沉淀）和马氏体转变产物的相间边界的原子结构。包围析出物板和马氏体板的相间边界都是半共格的。因此，在每种类型的相变中，都保持原子位点对应。在扩散转变（沉淀）中，由替代溶质原子的扩散控制的生长凸缘的成核和迁移导致转变位错的实际位移。它还同时伴随着固着失配位错的攀爬和滑动调节位错的滑动。因此，沉淀物/基体边界的迁移是一个非保守过程。另一方面，马氏体和基体之间的相界面是完全滑动的，因此可以保守地移动。

项目成果

T.Furuhara: "Atomic Structure of interphase borndary enclosing bcc precipitate formed in fcc matrix in a Ni-Cr alloy" Metallurgical and Materials Transactions A. 26A(印刷中). (1995)

T.Furuhara：“Ni-Cr 合金中 fcc 基体中形成的相间 bcc 沉淀物的原子结构”Metallurgical and Materials Transactions A. 26A（出版中）。

K.Tsuzaki: "Some Aspects of Bainite Transformations in Fe-based Alloys" Proceedings of the International Conference on Martensitic Transformations (ICOMAT-95). (in press).

K.Tsuzaki：“铁基合金中贝氏体转变的一些方面”马氏体转变国际会议记录 (ICOMAT-95)。

T.Furuhara: "Atomic Structure of Interphase Boundary of an alpha Precipitate Plate in a beta Ti-Cr Alloy" Philosophical Magazine Letters. Vol.72. 175-183 (1995)

T.Furuhara：“β Ti-Cr 合金中 α 沉淀板的相间边界的原子结构”哲学杂志快报。

T.Furuhara: "Atomic Structure of Interphase Boundary Enclosing Bcc Precipitate Formed in Fcc Matrix of a Ni-Cr Alloy" Metallurgical and Materials Transactions A. Vol.26A. 1971-1978 (1995)

T.Furuhara：“Ni-Cr 合金的 Fcc 基体中形成的包围 Bcc 沉淀物的相间边界的原子结构”冶金与材料学报 A. Vol.26A。

T. Furuhara: "Surface Relief Effect and Atomic Site Correspondence in the Grain Boundary α Precipitation in a β Ti-Cr Alloy" Scripta Materialia. 34. 381-386 (1996)

T. Furuhara：“β Ti-Cr 合金中晶界 α 沉淀的表面起伏效应和原子位点对应”Scripta Materialia。34. 381-386 (1996)