摘要
The response and failure of brass H62 specimens subjected to different levels of pre-loaded stresses and heating rates were investigated using a Gleeble-1500 thermal-mechanical material testing system. The metallographs of the tested material were also observed and analyzed. It is found that the increase of either pre-loaded stress or heating-rate decreases the failure temperature. Metallographic analysis shows that high heating-rate may cause stronger local thermal inconsistency(LTI) and remarkably increase the microdefects in the material,which may markedly degrade the macroscopic mechanical properties of the material.
The response and failure of brass H62 specimens subjected to different levels of pre-loaded stresses and heating rates were investigated using a Gleeble-1500 thermal-mechanical material testing system. The metallographs of the tested material were also observed and analyzed. It is found that the increase of either pre-loaded stress or heating-rate decreases the failure temperature. Metallographic analysis shows that high heating-rate may cause stronger local thermal inconsistency （LTI） and remarkably increase the microdefects in the material, which may markedly degrade the macroscopic mechanical properties of the material.
出处
《中国有色金属学会会刊：英文版》
CSCD
2007年第A01期228-231,共4页
Transactions of Nonferrous Metals Society of China
基金
Projects (10572157, 10272119) supported by the National Natural Science Foundation of China
关键词
黄铜
加热铝
金属材料
微观结构
brass H62
pre-loaded stress
heating rate
failure temperature
local thermal inconsistency
