(PS170)ΔKth Characteristics of small crack in steel with controlled interstitial carbon content

摘要

The ΔKth value of notch or cracked specimen is an important design parameter below which specimen will not become fracture. Therefore, increasing the ΔKth value through perspective of material science, such as strain aging effect, always attracts much attention. However, most research about strain aging usually consider the degree of strain aging over a wide range of temperature rather than over amount of interstitial atoms. Hence, in this paper, the influence of interstitial carbon content on ΔKth value of short crack will be investigated.