采用θ投影法和自行建立的复合修正模型对10Cr9MoW2VNbBN钢的蠕变曲线进行了预测,并与600℃和650℃时的蠕变试验数据进行了对比.结果表明:θ投影法能较好地描述蠕变应变与时间的关系,但对蠕变速率与时间的关系不能客观描述;自行建立的复合修正模型能够更客观地描述试验钢真实的蠕变行为;但基于复合修正模型的蠕变曲线结合断裂应变进行持久寿命外推时,其外推值高于真实值.
参考文献
| [1] | EVANS R;PARKER I;WILSHIRE B.An extrapolative procedure for long term creep-strain and creep life prediction[A].Swansea:Pineridge Press,1982:135-184. |
| [2] | 孙海生,徐彤,关凯书.Omega蠕变寿命评估方法及应用[J].压力容器,2012(09):19-23. |
| [3] | GRAHAM A;WALLES K F A .Relationships between long and short-time creep and tensile properties of a commercial alloy[J].Journal of the Iron and Steel Institute of Japan(in Japanese),1955,179:105-120. |
| [4] | EVANS R W;WILSHIRE B.Creep of metals and alloys[M].London:Institute of Metals,1985 |
| [5] | SAMUEL E I;CHOUDHARY B K;RAO K B S .Influence of temperature and strain rate on tensile work hardening behavior of type 316 LN austenitic stainless steel[J].Scripta Materialia,2002,46:507-512. |
| [6] | 陈国良;郭宏;孙继跃 .耐热钢12Cr1MoV蠕变性能的描述和外推[J].北京科技大学学报,1997,19(2):19-22. |
| [7] | 蔡庆木,刘月明,黄昌清,楼俊,田维坚.火电厂高温压力管道寿命预测模型的可靠性及进展[J].机械工程材料,2012(12):5-9. |
| [8] | Rolf Sandstrom .Basic model for primary and secondary creep in copper[J].Acta materialia,2012(1):314-322. |
| [9] | National Institude for Materials Science.NIMS creep data sheet[M].Tsukuba-shi,Ibaraki,Japan,2002 |
| [10] | KIMURA K;SAWADA K;KUBO K et al.Influence of stress on degradation and life prediction of high strength ferritic steels[J].ASME Pressure Vessel and Piping Division Conference Proceedings,2004,476:11-18. |
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