Cao Tieshan   

Associate Professor
Supervisor of Master's Candidates

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Language:English

Paper Publications

Title of Paper:基于参数Zc预测25Cr35Ni耐热钢的蠕变行为与持久寿命

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Date of Publication:2018-06-20

Journal:机械工程材料

Volume:42

Issue:6

Page Number:26-29

ISSN No.:1000-3738

Key Words:耐热钢;Zc参数法;持久寿命预测

Abstract:在不同温度T和不同应力σ 下对25Cr35Ni耐热钢进行蠕变试验,引入参数P对不同蠕变应变下的温度和时间进行归一化处理,分析了(P,σ)数据点随蠕变应变的变化规律,引入参数Z c分析了数据的分散程度并使用蠕变应变为5.0%下的试验数据对持久寿命进行了预测.结果表明:随蠕变应变的增加,σ-P曲线趋近于断裂曲线,Z c先迅速增大后趋于稳定,(P,σ)数据点与其对应拟合曲线的偏差减小;基于Z c参数法预测得到的持久寿命与实测持久寿命接近,数据分散程度较小.

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