J. Mater. Sci. Technol. ›› 1989, Vol. 5 ›› Issue (6): 421-425.
Creep Deformation and Rupture in Smooth and Notched Specimens in HK40 Steel
ZHU Shijie;ZHAO Jie;WANG Fugang;CAO Zhiben Dalian University of Technology, Liaoning, China. To whom correspondence should be addressed.
- DalianUniversityofTechnology,Liaoning,China.Towhomcorrespondenceshouldbeaddressed;DalianUniversityofTechnology,Liaoning,China;DalianUniversityofTechnology,Liaoning,China;DalianUniversityofTechnology,Liaoning,China
Creep Deformation and Rupture in Smooth and Notched Specimens in HK40 Steel
ZHU Shijie;ZHAO Jie;WANG Fugang;CAO Zhiben Dalian University of Technology, Liaoning, China. To whom correspondence should be addressed.
摘要： <正> The effects of the eutectic carbides randsecondary carbides on creep deformation andrupture in smooth bars and CT specimens havebeen studied. The results show that the resistanceof the eutectic carbides of skeleton shape tocrack growth is larger than that of the blockyshape carbides. The dendritic segregation ofsecondary carbides promotes the creep ductility.As the secondary carbide particles become coarser,the creep ductility increases and the crackgrowth rate decreases. However, if the sizeof secondary carbide is too large, the creepstrength decreases too much and therefore crackgrowth rate increases.