| METALS AND METAL MATRIX COMPOSITES |
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| Experimental and Numerical Study on Mechanical Response Behavior of H13 Steel Under Thermo-Mechanical Loading |
| XU Guocai1,2, LI Junwan1,2, ZUO Pengpeng1,2, WU Xiaochun1,2
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1 School of Materials Science and Engineering, Shanghai University, Shanghai 200072, China;
2 State Key Laboratory of Advanced Special Steel, Shanghai 200072, China |
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Abstract In-phase (IP) and out-of-phase (OP) thermo-mechanical fatigue (TMF) behavior of H13 steel were studied in the range of 200—600 ℃, under the symmetrical tension and compression mechanical strain control by the MTS thermo-mechanical fatigue test system and an electromagnetic-thermo-mechanical coupled finite element model. In addition, based on experimental and simulation data, the life prediction of H13 steel was carried out in combination with life prediction models. The results show that the maximum tensile and compressive stresses decrease conti-nuously with the number of cycle increases in the quasi-stable thermo-mechanical cycle. The inelastic strain occurring in the high temperature half cycle of the thermo-mechanical cycle is greater than that in the low temperature half cycle. Taking the simulated data of IP-TMF with the mechanical strain of 0.7% as an example, the maximum stress values at the maximum tensile and compressive mechanical strains are 598 MPa and -1 148 MPa respectively. Under the mechanical strain of 0.7%, the measured IP and OP thermo-mechanical fatigue life (cycle) of H13 steel are 287 and 266 respectively, while under the mechanical strain of 0.9% they has lifes of 207 and 189, respectively. According to the experimental and simulation data, combined with ostergren model, the predicted fatigue life is obtained and compared with the measured one.
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Published: 25 April 2020
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| Fund:This work was financially supported by National Key Research and Development Program of China(2016YFB0300400, 2016YFB0300404). |
About author:: Guocai Xuis engaged in the research on thermal mechanical fatigue performance of hot-working die steel in the mold steel research group of the School of Materials. Participated in the “13th Five-Year” National Key R&D Program “High-performance Tool Steel and Application” sub-project “Organization Evolution Law and Failure Mechanism in the Process of Die Steel Ser-vice”, and completed a number of topics, and published papers.
Junwan Lireceived his Ph.D. degree in Department of Mechanics and Engineering Science from Fudan University in 2010. He is currently an associate professor in School of Materials Science and Engineering of Shanghai University. He primarily engaged in the numerical research of material processing for advanced tool and die steel, the service behavior of metal materials, and the multi-scale numerical simulation of mechanical behavior of metallic materials. Especially, he has rich experience in the microstructure evolution and design calculation of materials.
He has participated in the National Key research and development program of China, the National Natural Science Foundation of China and the technical research projects supported by enterprises more than 30 items. He has granted 2 patents and published more than 50 papers on academic journals at home and abroad in which more than 35 and 40 were indexed by SCI and EI, respectively. |
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2020, Vol. 34 
