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The Hydrogen Behavior of Surface Layers of High Strength DP Thin Sheet Steels for Automobile  

Park, Jae-Woo (Department of Materials Science and Engineering, Seoul National University of Science and Technology)
Kang, Kae-Myung (Department of Materials Science and Engineering, Seoul National University of Science and Technology)
Publication Information
Journal of the Korean Institute of Gas / v.14, no.6, 2010 , pp. 38-43 More about this Journal
Abstract
According to the lack of resources and the stringency of environmental regulations, a study of the high strength thin plate sheet steels for automobile have been become an important issue for automobile industry. However, the problem of hydrogen embrittlement of high strength sheet steels was concerned with the degradation of mechanical properties. Therefore, we studied the hydrogen behavior of surface layers of 590MPa DP sheet steels on development using by relationship the microstructure of subsurface and the distribution of micro hardnesses. Hydrogen was charged into the specimens using by the cathodic electrolytic method. The behavors of under surface layers were investigated by the observation of microstructures and the micro vickers hardness test with the amount of hydrogen charging with hydrogen charging conditions.
Keywords
hydrogen embrittlement; DP sheet steels; cathodic electrolytic method;
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