FURTHER INVESTIGATION OF EFFECTS OF ATOMIC HYDROGEN AND FLAKES ON MECHANICAL PROPERTIES OF WHEEL STEEL
Xuechong Ren
北京科技大学材料科学与工程学院
Cite this article:
Xuechong Ren. FURTHER INVESTIGATION OF EFFECTS OF ATOMIC HYDROGEN AND FLAKES ON MECHANICAL PROPERTIES OF WHEEL STEEL. Acta Metall Sin, 2007, 42(1): 53-58 .
Abstract The effects of hydrogen and flakes on impact toughness and fatigue properties of a wheel steel have been investigated. The results show that atomic hydrogen has no effect on impact toughness when the diffusible hydrogen concentration is low (C0≤0.7×10-6). The flakes decrease and fluctuate impact toughness. Atomic hydrogen has no effect on fatigue properties when the diffusible hydrogen concentration is low (C0≤0.7×10-6). But atomic hydrogen can promote the initiation of fatigue cracks and increase the fatigue crack growth rate when the hydrogen concentration is high enough (C0≥2.5×10-6). The flakes increase and undulate the fatigue crack growth rate.
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