複合組織鋼의 衝擊에너지에 미치는 母相粒徑에 영향

Effect of Ferrite Grain Size on Impact Energy of Dual Phase Steel

In this investigation, the effect of microstructural factors on the impact energy was studied, using dual phase steels with soft phase of ferrite encapsulated by hard phase of martensite. It was found that the effect of the ferrite grain size on the impact energy decreases as the strength ratio increases, these results are due to the micro-brittlefracture facet by the difficulty of cleavage crack formation in the ferrite grain.