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LIU Xinyue, CAO Tieshan, LI Huifang, CHENG Congqian, MENG Xianming, ZHAO Jie. Prediction for Creep Behavior and Creep Rupture Life of 25Cr35Ni Heat Resistant Steel on Basis of Parameter Zc[J]. Materials and Mechanical Engineering, 2018, 42(6): 26-29. DOI: 10.11973/jxgccl201806005
Citation: LIU Xinyue, CAO Tieshan, LI Huifang, CHENG Congqian, MENG Xianming, ZHAO Jie. Prediction for Creep Behavior and Creep Rupture Life of 25Cr35Ni Heat Resistant Steel on Basis of Parameter Zc[J]. Materials and Mechanical Engineering, 2018, 42(6): 26-29. DOI: 10.11973/jxgccl201806005

Prediction for Creep Behavior and Creep Rupture Life of 25Cr35Ni Heat Resistant Steel on Basis of Parameter Zc

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  • Received Date: April 13, 2017
  • Revised Date: May 09, 2018
  • Creep tests were conducted on 25Cr35Ni heat-resistant steel at different temperatures T and different stresses σ. The temperature and time at different creep strains were normalized by introducing parameter P. The variation of (P,σ) data point with creep strain was analyzed. Parameter Zc was proposed to analyze the dispersion degree of data and to predict the creep rupture life with experimental data at creep strain of 5.0%. The results show that with increasing creep strain, the σ-P curve became close to the fracture curve; the value of Zc increased rapidly and then became stable; the deviation between (P,σ) data point and the corresponding fitting curve decreased. The predicted rupture lives on basis of Zc parameter method were close to the experimental rupture lives; the dispersion degree was relatively small.
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