Fracture of high temperature advanced materials.

高温先进材料的断裂。

• 批准号: 04044146
• 负责人: YOKOBORI Takeo
• 金额: $ 5.38万
• 依托单位: Teikyo University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for international Scientific Research
• 财政年份: 1992
• 资助国家: 日本
• 起止时间: 1992 至 1993
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-04044146/
• 关键词: Nonlinearily coupled micro and macro mechanics and comparative studies for high temperature fracture; Q^* parameter; Simple evaluation method for high temperature creep fracture life by master curve; Evaluation method for creep damage at high temperatu

Based on nonlinearily coupled microscopic (solid state physical) and macroscopic (continuum mechanical) concept and the idea of comparative studies for strength, new results have been obstained on the criterion for high temperature creep fracture. The main results among them are as follows :(1)Development of new criterion for predicting high temperature creep crack initiation, growth and fracture life from high temperature ductile to high temperature brittle materials such as superalloys, and ceramics with chemical bonding of different types. This enables to discriminate the behavior in terms of materials parameters, such as ductility. It includes Monkman-Grant formula as a special case.(2)The establishment of simple evaluation method for predicting high temperature creep life by master curve unifiedly from smooth specimen throughout to notched and cracked specimen. This method is named as alpha parameter method.

基于非线性耦合的微观（固态物理）和宏观（连续介质力学）概念和强度对比研究的思想，高温蠕变断裂判据取得了新的成果。主要成果如下：(1)建立了预测高温合金、不同类型化学键陶瓷等高温韧性至高温脆性材料的高温蠕变裂纹萌生、扩展和断裂寿命的新判据。这使得能够根据材料参数（例如延展性）来区分行为。其中包括Monkman-Grant公式作为特例。(2)建立了从光滑试件到缺口、裂纹试件统一通过主曲线预测高温蠕变寿命的简易评价方法。这种方法被称为alpha参数法。

项目成果

Y.Combres: "Surface Precipitation after Cathodic Charging of Hydrogen and Heat Treatment in Air for the TiAl Intermetallic Compounds" Scripta Metallurgica et Materilia. 27. 509-514 (1992)

Y.Combres：“TiAl 金属间化合物在空气中阴极充电和热处理后的表面沉淀”Scripta Metallurgica et Materilia。

H.Tsuda: "Effect of Interfacial Properties on Fracture Toughness in Fiber-Reinforced Ceramic Composites" Journal of the Ceramic Society of Japan,. 100. 998-1006 (1992)

H.Tsuda：“界面性质对纤维增强陶瓷复合材料断裂韧性的影响”日本陶瓷学会杂志，。

横堀武夫: "無線系先端材料強度の向上と評価に対する材料強度学としての体系化の基盤" 日本材料強度学会誌. 26. 34-47 (1992)

Takeo Yokobori：“作为材料强度科学的系统化基础，用于改进和评估无线系统先进材料的强度”，日本材料强度学会杂志，26. 34-47 (1992)。

A.Toshimitsu Yokobori,Jr. and T.Yokobori: "A New Concept on High Temperature Creep Crack Initiation, Growth and Creep Fracture Life." Proc. 5th Int. Conf. Creep and Fracture of Engng. Matls. 81-97 (1993)

横堀俊光

R.W.Evans: "Prediction of long-term creep and creep fracture data for a 1 crMoV rotor steel" Proc.5th Int.Conf.Creep & Fracture of Engineering Materials and Structures. 633-642 (1993)

R.W.Evans：“1 crMoV 转子钢的长期蠕变和蠕变断裂数据的预测”Proc.5th Int.Conf.Creep