粒界上に液相粒子を含むバイおよびトライ・クリスタルの高温変形挙動

晶界上含有液相颗粒的双晶和三晶的高温变形行为

• 批准号: 08242215
• 负责人: 尾中 晋
• 金额: $ 1.02万
• 依托单位: Kyoto University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research on Priority Areas
• 财政年份: 1996
• 资助国家: 日本
• 起止时间: 1996 至 无数据
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-08242215/
• 关键词: 高温変形; 粒界破壊; 液相粒子; 双結晶; 三重結晶; 分散強化

多結晶中の液相粒子が大きな量の粒界すべりを起こすための付随調整機構として重要であるという指摘がなされているが,液相粒子が結晶の塑性変形に及ぼす影響や粒界上の液相粒子が粒界でのすべりや破壊におよぼす影響には不明の点が数多く存在する.そこで本研究では液相粒子を含む銅単結晶,銅双結晶(バイクリスタル)そして銅多結晶についての実験的,理論的検討を行ない,結晶粒内や結晶粒界上の液相粒子が結晶の塑性変形や結晶粒界のすべりにおよぼす影響について多方向からの考察をした.また,粒界上に液相粒子を含む三重結晶(トライクリスタル)の高温変形挙動を調査する準備として,銅基固溶体合金三重結晶の高温変形挙動におよぼす粒界三重点の影響についても考察を加えた.得られた結果をまとめると以下のようになる.1.B_2O_3粒子が銅母相単結晶の高温変形挙動に及ぼす影響(1)液相B_2O_3粒子は,固相SiO_2粒子と同じく母相の高温強化に有効である.(2)固相SiO_2粒子は,液相B_2O_3粒子と同じく高温域では材料に加工硬化をもたらす原因とはならない.2.粒界上のB_2O_3粒子が銅多結晶と双結晶の高温変形挙動に及ぼす影響(1)粒界上の液相B_2O_3粒子は,銅多結晶の脆性的な粒界破壊の原因になる.(2)粒界上の液相B_2O_3粒子は,粒界上の固相GeO_2粒子に比較して銅多結晶の粒界破壊をより促進する.3.粒界三重線が三重結合の粒界破壊におよぼす影響.三重線は中間的な温度域では粒界破壊を抑制するものの,高温域では粒界き裂の優先発生箇所になる.

A large amount of liquid phase particles in a multi-crystal grain boundary are produced by adjusting the mechanism of the grain boundary. The liquid phase particles affect the plastic deformation of the crystal. In this paper, we investigate the plastic deformation of liquid phase particles containing Cu single crystal, Cu double crystal and Cu multiple crystal, and investigate the influence of liquid phase particles on crystal grain boundary and crystal grain boundary on multi-directional deformation. Preparation for investigation of high temperature deformation behavior of ternary crystals in copper-based solid solution alloys 1. The influence of B_2O_3 particles on the high temperature deformation of copper parent phase crystals (1) The influence of B_2O_3 particles on the high temperature strengthening of copper parent phase crystals (2) The influence of B_2O_3 particles on the high temperature deformation of copper parent phase crystals (3) The influence of B_2O_3 particles on the high temperature strengthening of copper parent phase crystals (4) The influence of B_2O_3 particles on the high temperature deformation of copper parent phase crystals (3) The influence of B_2O_3 particles on the high temperature strengthening of copper parent phase crystals (4) The influence of B_2O_3 particles on the high temperature deformation of copper parent phase crystals (3) The influence of B_2O_3 particles on the high temperature strengthening of copper parent phase crystals (4) The influence of B_2O_3 particles on the high temperature deformation of copper parent phase crystals (3) The influence of B_2O_3 particles on the high temperature strengthening of copper parent phase crystals (4) The influence of B_2O_3 particles on the high temperature strengthening of copper parent (2)2. B_2O_3 particles on grain boundaries influence the deformation behavior of copper polycrystalline and twin crystals at high temperature.(1) B_2O_3 particles on grain boundaries influence the brittle grain boundaries of copper polycrystalline. (2)The liquid-phase B_2O_3 particles on the grain boundary and the solid-phase GeO_2 particles on the grain boundary promote the grain boundary breakdown of copper polycrystals. The triple line is located in the middle of the temperature range, and the temperature range is located in the middle of the temperature range.

项目成果

S.Onaka: "Shape Change of Liquid B_2O_3 Particles in Copper Single Crystals Deformed at High Temperatures" Philosophical Magazine A. 74. 531-541 (1996)

S.Onaka：“高温变形铜单晶中液态 B_2O_3 颗粒的形状变化”哲学杂志 A. 74. 531-541 (1996)