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.

基于非线性耦合的显微镜（固态物理）和宏观机械概念以及强度比较研究的概念，因此在高温蠕变骨折的标准上，新结果却障碍。其中的主要结果如下：（1）开发新标准，用于预测从高温延展到高温脆性材料（例如Superalloys）以及具有不同类型化学键合的陶瓷的高温裂纹启动，生长和断裂寿命。这使得可以从材料参数（例如延展性）方面区分行为。 （2）建立简单评估方法，以通过主曲线从平滑样品到凹口和破裂的样品来预测高温蠕变寿命，以建立简单的评估方法。此方法称为alpha参数方法。

项目成果

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

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

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)。

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，。

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。