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材料工程  2015, Vol. 43 Issue (7): 87-92    DOI: 10.11868/j.issn.1001-4381.2015.07.015
  测试与表征 本期目录 | 过刊浏览 | 高级检索 |
θ投影法和复合模型在预测耐热钢蠕变行为的比较分析
江冯, 李萍, 程从前, 刘春慧, 赵杰
大连理工大学 材料科学与工程学院, 辽宁 大连 116024
Comparative Analysis of Creep Behavior Prediction of Heat Resistant Steel Based on Theta Projection and Composite Model
JIANG Feng, LI Ping, CHENG Cong-qian, LIU Chun-hui, ZHAO Jie
School of Materials Science and Engineering, Dalian University of Technology, Dalian 116024, Liaoning, China
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摘要 比较分析了复合模型法和θ投影法在描述P92钢蠕变行为时的差异.结果表明:两者在拟合P92钢蠕变-时间关系曲线上均有较高的精度,但在描述蠕变速率-时间曲线上,θ投影法呈现较大的误差而复合模型则有良好的关联结果.在外推蠕变速率时,θ投影法的外推结果发生较大偏折,而复合模型的预测结果更接近实际变化趋势.基于蠕变曲线外推持久寿命的结果表明:5%~50%范围内的断裂应变对寿命预测结果影响较小,两种模型预测的持久寿命值之间也相差不大.
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江冯
李萍
程从前
刘春慧
赵杰
关键词 θ投影法复合模型蠕变速率寿命预测    
Abstract:The difference of the creep curves of P92 steel was comparatively analyzed by theta projection method and composite model. The results show that both the creep-time curves of P92 steel with two methods have a higher accuracy. However, when describing the creep rate-time curves, the theta projection method exhibits big error, while, the composite model can show more accurate results; When extrapolating creep rate, the theta projection method has large deflection, while, the composite model can predict more near the actual trend. When extrapolating creep rupture life based on creep curves,the results show that the fracture strain between 5% and 50% has little effect on the life prediction. The values of endurance life extrapolated by the two models are approximately the same.
Key words&theta    projection    composite model    creep rate    life prediction
收稿日期: 2014-03-21      出版日期: 2015-07-27
中图分类号:  TG115.5  
通讯作者: 赵杰(1964-),男,博士,教授,主要从事材料的力学性能(常温、疲劳断裂、高温蠕变)、强度及可靠性、材料变形机制与组织结构关系的研究,联系地址:大连理工大学材料科学与工程学院(116024)     E-mail: jiezhao@dlut.edu.cn
引用本文:   
江冯, 李萍, 程从前, 刘春慧, 赵杰. θ投影法和复合模型在预测耐热钢蠕变行为的比较分析[J]. 材料工程, 2015, 43(7): 87-92.
JIANG Feng, LI Ping, CHENG Cong-qian, LIU Chun-hui, ZHAO Jie. Comparative Analysis of Creep Behavior Prediction of Heat Resistant Steel Based on Theta Projection and Composite Model. Journal of Materials Engineering, 2015, 43(7): 87-92.
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http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2015.07.015      或      http://jme.biam.ac.cn/CN/Y2015/V43/I7/87
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