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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 17    Special 1    November 2007

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Effect of heating-rate on failure temperature of pre-loaded brass H62
CHEN Bin(陈  斌), PENG Xiang-he(彭向和), FAN Jing-hong(范镜泓), SUN Shi-tao(孙士涛)

College of Resource and Environment Science, Chongqing University, Chongqing 400044, China

Abstract: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.

 

Key words: brass H62; pre-loaded stress; heating rate; failure temperature; local thermal inconsistency

ISSN 1672-7029
CN 43-1423/U

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