CAJ | 학술논문

目的：研究快速简便的金属材料疲劳裂纹扩展门槛值测定方法。方法利用原位观察技术，通过对裂纹扩展的精确捕捉获得材料裂纹扩展门槛值。结果利用原位技术测量获得的LY12CZ铝合金材料疲劳裂纹门槛值与Bucci采用升降法获得的门槛值数据相近，并且测量简便。结论利用扫描电镜原位技术可以快速获得裂纹扩展门槛值，是一项具有工程应用前景的裂纹扩展门槛值测量手段。
목적：연구쾌속간편적금속재료피로렬문확전문함치측정방법。방법이용원위관찰기술，통과대렬문확전적정학포착획득재료렬문확전문함치。결과이용원위기술측량획득적LY12CZ려합금재료피로렬문문함치여Bucci채용승강법획득적문함치수거상근，병차측량간편。결론이용소묘전경원위기술가이쾌속획득렬문확전문함치，시일항구유공정응용전경적렬문확전문함치측량수단。
Objective To achieve a method for quick and convenient determination of the crack growth threshold value of metal material. Methods By means of in situ observation techniques,the threshold crack growth threshold of material could be obtained by accurately capturing the crack propagation behaviour. Results The crack growth threshold value given by the proposed in situ method was close to the value given by Bucci using the up and down method. Conclusion The proposed in situ method for quick and convenient determination of the crack growth threshold is very promising for engineering application.