Modeling Intergranular Fracture at Elevated Temperature

• Main Author: Mohd Syahmi Bin Mohd Yusof, Mohd Syahmi
• Format: Final Year Project
• Language: English
• Published: Universiti Teknologi Petronas 2010
• Subjects: TJ Mechanical engineering and machinery
• Online Access: http://utpedia.utp.edu.my/1486/1/Mohd_Syahmi_Bin_Mohd_Yusof.pdf; http://utpedia.utp.edu.my/1486/

This project presumes modeling intergranular fracture at elevated temperature. The main task is to replicate the journal article by Rishi Raj and M. F. Ashby [1]. The model will be simulated for other materials and applications which relate to intergranular fracture at elevated temperature. By having this model, the time to rupture of material at elevated temperature can be estimated. There are several types of creep deformation leading to material failure. This project focused only on a type of creep failure which is due to nucleation, growth and coalescence of voids. The work involves two main phases which are replicating the nucleation and growth of voids in single phase materials such as copper and then, expanding the work to more complicated material systems. The model of fixed number of nuclei is done using default data of copper and replicated with other materials containing iron and metal carbides. The model and the results using other metals are shown in the results and discussions section. Some problems were encountered during modeling of rupture time for continuous nucleation. The results were not as expected when compared to the results presented in the Raj and Ashby’s paper. The main reason is that some of the data used in the paper were not provided. The model for rupture time for fixed number of nuclei and the baseline for the model for continuous nucleation have been successfully created