Effect of Mn content on microstructure, tensile and impact properties of SA508Gr.4N steel for reactor pressure vessel
作者： Xi-kou He , Zhi-qiang Yang , Zhen Wang , Shi-bin Qiao , Zheng-dong Liu
DOI: 10.1007/S42243-020-00393-1
关键词: Grain boundary 、 Hardenability 、 Materials science 、 Microstructure 、 Diffractometer 、 Toughness 、 Composite material 、 Scanning electron microscope 、 Ultimate tensile strength 、 Transmission electron microscopy
摘要: The effect of manganese (Mn) on the microstructure, tensile and impact properties SA508Gr.4N steel has been experimentally investigated. influence Mn content substructure was investigated using scanning electron microscope, back-scattered diffractometer transmission microscope. It found that increased had a beneficial both strength toughness. Examination microstructure revealed smaller size block larger number high-angle grain boundaries with higher content. change ultimate toughness increasing attributed to hardenability, crack propagation path by refining.
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