Numerical modeling of high temperature fracture of metallic composites

3rd International Meeting for Researchers in Materials and Plasma Technology; 1st Symposium on Nanoscience and Nanotechnology

物理学;材料科学

Cendales, E.D.^1 ; García, A.^1

Fundación Universitaria Los Libertadores, Bogotá, Colombia^1

关键词: Bulk metallic glass;    High temperature;    Increasing temperatures;    Mechanical behavior;    Mechanical properties of materials;    Melt temperature;    Metal composite materials;    Metallic composites;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/687/1/012061/pdf
DOI  :  10.1088/1742-6596/687/1/012061

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Mechanical properties of materials are strongly affected by increasing temperature, showing behaviors that could cause failure as creep. This article provides a brief theoretical description about fracture of materials, deepening on creep and intergranular creep. Some parameters as creep strain, strain rate, time to failure and displacement of the crack tip of a metallic glass selected at high temperature were studied. This paper shows a computer numerical model that permits establish mechanical behavior of a metal composite material Zr52.5Cu18Ni14.5Al10Ti5, bulk metallic glass. In the presence of cracking when the material is subjected to temperatures exceeding 30% of the melt temperature of material. The results obtained by computer simulation show correlation with the results about the behavior of the material viewed through the creep test. From the results we conclude that the mechanical properties of the material generally do not undergo major changes at high temperatures. However, at temperatures greater than 650C, the effect of the application of stress during creep entails failures in this kind of material.