Structure and High-temperature Strength of Refractory-Metal Eutectic Composites

难熔金属共晶复合材料的结构和高温强度

• 批准号: 63044107
• 负责人: GOTO Shoji
• 金额: $ 3.2万
• 依托单位: Kyushu University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Overseas Scientific Survey.
• 财政年份: 1988
• 资助国家: 日本
• 起止时间: 1988 至 1989
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-63044107/
• 关键词: Metal Matrix Composite; Creep; Interface; Aspect Ratio; Rule of Mixtures; High Temperature

The deformation mechanisms that can occur in advanced metal matrix composites, such as eutectic composites, consisting of phases with quite different melting points and deformation characteristics are studied. The implications of different deformation modes in the fibers and matrix for the creep behaviour of the composite are considered with particular reference to the microstructural characteristids of the composite. A model describing the time-dependent deformation of a composite consisting of elastic fibers entrained in a metal matrix deforming by power-law creep is developed. The theory uses the formalism of continuum damage mechanics to account for the end effects associated with short fibers and the effects of interfaces with rheological behaviours that differ from either fiber or matrix. The model identifies the important microstructural and property characteristics of the constituent phases that can significantly influence the creep behaviour. The model defines a interface factor B which indicates the effectiveness of stress transfer between matrix and fiber. The important parameters in determining creep performance are B, fiber aspect ratio and fiber volume fraction.

研究了由熔点和变形特性完全不同的相组成的先进金属基复合材料，如共晶复合材料中可能发生的变形机制。纤维和基体中不同的变形模式对复合材料蠕变行为的影响被认为是与复合材料的微观结构characteristids特别参考。建立了一个描述弹性纤维夹在金属基体中的复合材料随时间变化的变形模型，该复合材料按幂律蠕变变形。该理论使用的形式主义的连续损伤力学来解释与短纤维和界面的流变行为，不同于纤维或基质的影响与端部效应。该模型确定了重要的微观结构和性能特征的组成相，可以显着影响蠕变行为。该模型定义了一个界面因子B，它表示基体和纤维之间的应力传递的有效性。确定蠕变性能的重要参数是B、纤维长径比和纤维体积分数。

项目成果

Ying-Hwa Yeh: "High-Temperature Creep Behavior of a Dispersion- and Solution- Hardened Al-3.1 at% Mg-1.3 vol% Be Alloy -Absence of Threshold Stress-" J. Japan Inst. Metals. 53. 296-302 (1989)

英华%20Yeh:%20"高温%20蠕变%20行为%20的%20a%20分散-%20和%20固溶-%20硬化%20Al-3.1%20at%%20Mg-1.3%20vol%%20Be%20合金%20

Hideharu NAKASHIMA: "Combined Effect of Solution and Dispersion Hardenings at High Temperature" Materials Transactions,JIM. 31. 35-45 (1989)

Hideharu NAKASHIMA：“高温下固溶和弥散硬化的综合效应”Materials Transactions，JIM。

後藤正治: "AlーCuAl_2ラメラ-共晶複合材料の高温降伏強度におよぼすコロニ-境界の効果" 日本金属学会誌. 52. 762-770 (1988)

Masaharu Goto：“团界对 Al-CuAl_2 层状共晶复合材料高温屈服强度的影响”日本金属学会杂志 52. 762-770 (1988)。

Shoji GOTO: "Effect of Colony Boundary on the High-temperature Strengh of Al-CuAl_2 Lamellar-eutectic Composits" Proc. 8th Int. Conf. on the Strength of Metals and Alloys. 983-988 (1988)

Shoji GOTO：“团界对 Al-CuAl_2 层状共晶复合材料高温强度的影响”Proc。

Shoji GOTO: "Effect of Colony Boundaries on Yield Strength of Al-CuAl_2 Lamellar-Eutectic Composites at High Temperatures" Materials Transactions,JIM. 30. 383-393 (1989)

Shoji GOTO：“高温下集落边界对 Al-CuAl_2 层状共晶复合材料屈服强度的影响”Materials Transactions，JIM。