Nondestructive Evaluation of Thermally Degraded 2.25Cr-1Mo Steel by Electrical Resistivity Measurement
Nondestructive Evaluation of Thermally Degraded 2.25Cr-1Mo Steel by Electrical Resistivity Measurement
复制标题
电阻率测量法对热降解2.25Cr-1Mo钢的无损评价
DOI：
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发表时间：
2003
期刊：
影响因子：
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通讯作者：
S. Kwun
中科院分区：
文献类型：
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作者：
J. Byeon;S. Kwun
采用电阻率法对2.25Cr-1 Mo钢热时效后的劣化进行了非破坏性评价。采用人工时效方法模拟2.25Cr-1 Mo钢在540 ℃长期热暴露后的组织变化。通过测量显微组织参数（基体中Mo的固溶量）、力学性能（韧脆转变温度）和电阻率，研究了这些参数之间的关系。Mo的溶解量和电阻率在老化的最初1000小时内迅速下降，然后变化不大。另一方面，韧脆转变温度（DBTT）在时效初期迅速升高，随后趋于饱和。电阻率分别与溶解钼量和DBTT呈线性相关。建议电阻率作为评价热退化2.25Cr-1 Mo钢DBTT的潜在无损评价参数。
An attempt was made to evaluate nondestructively the degradation of thermally aged 2.25Cr-1Mo steel by electrical resistivity measurement. Artificial aging was performed to simulate the microstructural changes in 2.25Cr-1Mo steel arising from long time exposure at 540 C. Microstructural parameter (amount of dissolved Mo in the matrix), mechanical property (ductile-brittle transition temperature) and electrical resistivity were measured to investigate the relationship among these parameters. Both the amount of dissolved Mo and the electrical resistivity decreased rapidly in the initial 1000 hours of aging and then changed little thereafter. On the other hand, the ductile-brittle transition temperature (DBTT) increased rapidly in the initial stage of aging and then saturated afterward. Electrical resistivity was found to have linear correlation with the amount of dissolved Mo and DBTT, respectivley. Electrical resistivity was suggested as a potential nondestructive evaluation parameter for assessing DBTT of the thermally degraded 2.25Cr-1Mo steel.