Engineering Commons^™

Determination Of Yield Behaviour Of Boron Alloy Steel At High Temperature, J Tungtrongpairoj, V Uthaisangsuk, W Bleck

Journal of Metals, Materials and Minerals

The hot tensile test is a basic material testing method for investigation of the mechanical properties of steel at high temperature conditions. In industrial hot sheet forming processes such as hot stamping and hot gas metal forming, the influences of temperature and strain rate on microstructure and material behaviour play a significant role. In this work, sheet samples of steel grade 22MnB5 were examined using a hot deformation simulator. Different temperatures between 900 and 1200°C, which are above Ac3, and strain rates between 0.001 and 0.1 s-1 were considered. During the tensile test, a laser speckle extensometer (LSE) was deployed …