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| Fatigue properties of hot-rolled medium manganese steel treated by ART-annealing |
| ZHOU Feng-luan1,2,3, WANG Cun-yu1, CAO Wen-quan1, DONG Han1,4 |
1. Institute of Special Steels, Central Iron and Steel Research Institute, Beijing 100081, China;
2. Testing Center, NCS Testing Technology Co.,Ltd., Beijing 100081, China;
3. Department of Technology, AVIC Touchstone Testing Innovation Cooperation, Langfang 065300, Hebei, China;
4. School of Material Science and Engineering, Shanghai University, Shanghai 200444, China |
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Abstract In order to study the effect of cyclic loading on the microstructure and mechanical properties of austenitic steel,the fatigue properties of manganese steel in reverse phase transformation were studied. The microstructure was characterized by SEM,EBSD,XRD,etc.,and uniaxial tensile test was used to characterized the mechanical properties before and after fatigue. The research results show that under the test condition of stress ratio R=-1,the median fatigue limit of reverse phase transformation manganese steel is 378 MPa,and the ratio of fatigue limit to tensile strength σ-1/Rm=0.48. Medium manganese steel is ultrafine grain size characteristics are conducive to hindering secondary fatigue crack growth,and the transformation behavior of metastable austenite is greatly affected by the stress amplitude. Under the stress level of the median fatigue limit,metastable austenite and uniaxial tensile properties are subject to cyclic loading has little effect.
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Received: 03 April 2020
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2020, Vol. 55 
