Interphase-boundary structures and mechanical properties of two-phase ( / ) stainless steel bicrystals

两相（ / ）不锈钢双晶的相界结构和力学性能

• 批准号: 62550475
• 负责人: MIURA Sei
• 金额: $ 0.19万
• 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 (C)
• 财政年份: 1987
• 资助国家: 日本
• 起止时间: 1987 至 1988
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-62550475/
• 关键词: Two-phase stainless steel; Multi-phase material; Interface; Bicrystal; Kurdjumov-Sachs orientation relationship; Diffusion bonding; Mechanical property; 異相界面; Kurdjunov-Sachs関係; 異相双結晶; 拡散相変態; γ; αステンレス鋼双結晶; FCC; BCC相界面構造; 拡散誘起双晶

The morphology of two-phase ( / ) stainless steel couples, starting from Fe- 30Cr( -phase) and Fe-15Cr-15Ni( -phase) alloys produced by a solid-solid diffusion method has been investigated. Macroscopic units made of single crystals of the - and - phases (two-phase bicrystals) could be obtained. Interphase boundaries between a parent -phase and a transformed -phase have been found to be essentially planar and no special structual defects have been detected, excepting a so-called diffusion-induced twin faults grown often in the -phase due to the inevitable concentration gradient adjacent to the interphase boundary.It is found that the transformed ( _n)-phase generally inherits the crystallographic orien-tation of the original ( _o)-phase in a similar manner to "Grain growth", when the initial bonding orientation relation is arbitrary. However, if the bonding orientation relation is set to be a near Kurjumov-Sachs relation which is a well-known preferential orientation relation between precipitate and matrix in this system, nucleation of the phase transformation ( ) occurs and the resulting orientation relations become closer to the preferential one. These facts mean that the critical condition for the occurrence of the "nucleation" may be attributable to the interfacial erergy criterion on the ( / )-interphase boundary and the grain-boundary between the _o - and _n - phases.Study to reveal the relationship between structures and sliding behavior of the interphase boundary in two-phase ( / ) stainless steel bicrystals are in progress.

本文研究了用固-固扩散法制备的Fe-30 Cr（-相）和Fe-15 Cr-15 Ni（-相）两相（/）不锈钢偶的形貌。可以获得由-和-相的单晶（两相双晶）制成的宏观单元。已经发现母相和转变相之间的相间边界基本上是平面的并且没有检测到特殊的结构缺陷，除了由于在相界面附近不可避免的浓度梯度而在-相中常生长的所谓的扩散诱导孪晶缺陷外，发现转变后的（_n）-相一般继承了原始（_o）-相的晶体学取向。当初始键合取向关系是任意的时，以类似于“晶粒生长”的方式观察到“晶粒生长”相。然而，如果键合取向关系被设置为接近Kurjumov-Sachs关系，这是该系统中沉淀物和基体之间的众所周知的择优取向关系，则发生相变的成核（），并且所得取向关系变得更接近择优取向关系。这些事实意味着，（/）相界面和_o -和_n -相之间的晶界上的界面能判据可能是“形核”发生的临界条件。揭示两相（/）不锈钢双晶中相界面结构与滑动行为之间关系的研究正在进行中。

项目成果

Satoshi Hashimoto: Fundamentals of Diffusion Bonding(Proc.of the 1st Seikin International Symposium,Tokyo,Japan). 191-210 (1987)

桥本聪：扩散接合的基础（第一届精金国际研讨会论文集，日本东京）。

Satoshi Hashimoto: "A Method of Grain-Boundary Design and Control in Polycrystals" Fundamentals of Diffusion Bonding(Proc. of the 1st Seiken International Symposium, Tokyo, Japan). 191-210 (1987)

Satoshi Hashimoto：“多晶晶界设计和控制的方法”扩散键合基础（第一届 Seiken 国际研讨会论文集，日本东京）。

S. HASHIMOTO and S. MIURA, Yoichi Ishida(ed.): "Fundamentals of Diffusion Bonding. Proceedings of the First Seiken International Symposium on Interface Structure, Propeities and Diffusion Bonding, Tokyo, Japan, 2-4 december 1985" Elsevier Amsterdsm, 511 (

S. HASHIMOTO 和 S. MIURA，Yoichi Ishida（编辑）：“扩散键合基础。第一届 Seiken 国际界面结构、特性和扩散键合研讨会论文集，日本东京，1985 年 12 月 2-4 日”Elsevier Amsterdsm，

Satoshi Hashimoto: "Interphase-Boundary Structures and Mechanical Properties of Two-Phase ( / ) Stainless Steel Bicrystals"

Satoshi Hashimoto：“两相 ( / ) 不锈钢双晶的相界面结构和力学性能”

Satoshi Hashimoto: Fundamentals of Diffusion Bonding(Proc.of the 1st Seiken International Symposium,Tokyo,Japan). 191-210 (1987)

Satoshi Hashimoto：扩散键合基础（第一届 Seiken 国际研讨会论文集，日本东京）。