CAJ | 학술논문

介绍了直流电压降（DCPD）方法测量材料裂纹扩展的原理，并采用DCPD方法测量了反应堆典型结构材料在空气中的疲劳裂纹扩展速率（CGR），分析了载荷、频率和载荷比（R＝ Kmax/Kmin ，K为应力强度因子）对疲劳裂纹扩展速率的影响。实验结果表明，材料的硬度与疲劳裂纹扩展速率有密切关系，即材料硬度越高，裂纹扩展速率越高。
개소료직류전압강（DCPD）방법측량재료렬문확전적원리，병채용DCPD방법측량료반응퇴전형결구재료재공기중적피로렬문확전속솔（CGR），분석료재하、빈솔화재하비（R＝ Kmax/Kmin ，K위응력강도인자）대피로렬문확전속솔적영향。실험결과표명，재료적경도여피로렬문확전속솔유밀절관계，즉재료경도월고，렬문확전속솔월고。
The principles and details of direct current potential drop (DCPD) in monito-ring the crack growth of reactor structural materials was introduced in this paper .Based on this method ,the fatigue crack grow th rate (CGR) of typical structural materials in nuclear power systems was measured .The effects of applied load ,load ratio and loading frequency on the fatigue crack grow th rate of reactor structural materials were dis-cussed .The result shows that the fatigue crack growth rate of reactor structural materi-als depends on the hardness of materials ,and the harder the material is ,the higher the rate of crack grow th is .