Correlation between pore structure and compression behavior of porous sintered Cu-Ni-Cr alloy at elevated temperatures:An experimental and numerical study
The correlation between pore structure and compression behavior in porous Cu alloys with 51%-62 % porosity was examined at elevated temperature.Scanning electron microscopy and numerical simulation were used to examine and to analyze the details of the microstructure and deformation surface.Compression tests were utilized to evaluate the mechanical properties in temperatures ranging from 550 to 650 ℃.The compression strength, elastic modulus, yield stress all increased with a decrease in porosity.Two-dimensional microstructure-based finite element modeling showed that the pore size and pore structure were the main factors affecting the compression properties of porous Cu alloys.The enhanced compression behavior of the denser alloys could be attributed to smaller pore size and porosity which resulted in more homogeneous deformation and decreased strain localization in the material.Otherwise, the shape of a pore has a severe influence on the structure stability properties of the material, i.e.every increase of pore size corresponds to a decrease of structure stability.
porous Cu-Ni-Cr alloy pore structure elevated temperature compression behavior
Wei Li Jian Chen Yanjie Ren Wei Qiu Jianjun He Jianlin Chen
School of Energy and Power Engineering, Changsha University of Science and Technology, Changsha, Hunan 410004, China
国内会议
西安
英文
77-84
2013-10-25（万方平台首次上网日期，不代表论文的发表时间）