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The influence of non-metallic inclusion on the fracture behaviors of 25Mn-5Cr-1Ni austenitic steel |
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| Authors: | I. Maekawa Y. Tanabe J.H. Lee S. Nishida |
| Affiliation: | Department of Mechanical Engineering II, Tohoku University, Sendai, Japan Shin-nippon Steel Co., Central Research Group, Yawata, Kitakyushu, Japan |
| Abstract: | The influence of inclusion on fatigue life, threshold stress intensity factor, elasticplastic fracture toughness and Charpy absorbed energy of high manganese steel were studied for the temperature range of 298 ˜ 77 K. For this purpose, two series of steel, which contain different inclusion quantities, were used. Specimens are prepared to be S-L or S-T orientation with regard to the rolling direction. Experimental results showed that reduction in above strengths depend on both quantity and the orientation of inclusion. Crack growth behavior was discussed by taking into account the linkage of a main crack with a micro crack formed at the inclusion tip. |
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