DC potential drop method for evaluating material degradation
DC potential drop method for evaluating material degradation
复制标题
用于评估材料退化的直流电势降法
DOI：
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发表时间：
2004
期刊：
影响因子：
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通讯作者：
J. Koo
中科院分区：
文献类型：
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作者：
C. Seok;B. Bae;J. Koo
电厂和化工厂老化部件的剩余寿命估算是非常重要的，因为部件的机械性能会随着在高温下的使用时间而退化。由于很难从工作部件中提取样品来评估部件的力学性能，因此需要采用无损技术来评估部件的退化。在本研究中，通过630℃的等温时效热处理，制备了几种不同降解水平的试验材料。采用直流电位降法和拉伸韧性、断裂韧性等破坏性方法评价了1Cr-1Mo-0.25V钢的降解性能。在这个结果中，我们可以看到，抗拉强度和断裂韧性可以由电阻率计算，并且可以使用直流电位降法，非破坏性方法来评估材料的降解。
The remaining life estimation for the aged components in power plants as well as chemical plants are very important because mechanical properties of the components are degraded with in-service exposure time in high temperatures. Since it is difficult to take specimens from the operating components to evaluate mechanical properties of components, nondestructive techniques are needed to evaluate the degradation. In this study, test materials with several different degradation levels were prepared by isothermal aging heat treatment at 630°C. The DC potential drop method and destructive methods such as tensile and fracture toughness were used in order to evaluate the degradation of 1Cr-1Mo-0.25V steels. In this result, we can see that tensile strength and fracture toughness can be calculated from resistivity and it is possible to evaluate material degradation using DC potential drop method, non-destructive method.