Small-scale creep crack growth

Liu, C.D.; Yan, Han; Yan, Maode; Chaturvedi, M.C.

doi:10.1016/0013-7944(92)90183-f

Cited by 9 publications

(2 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…From these three assumptions, it has been deduced that the creep crack growth in Alloy 7 18 at 923K can be represented by the effective driving force, Ge, as (18). (3) where Ge = (K2 -K2th)/E and Kth is the threshold stress intensity factor for creep crack growth, Dgb is the diffusion coefficient in the grain boundary material, d is the grain size and rl is a material constant associated with the material surface energy.…”

Section: Creep Crack Growth Mechanismmentioning

confidence: 99%

“…Since the stress intensity factor results from linear elastic fracture mechanics, there is always doubt as to whether it can be used to describe creep crack growth, although the stress intensity factor is much better than other parameters for correlating with creep crack growth rates of some materials (17). In a previous study (18), the condition under which the stress intensity factor can be used as a parameter for creep crack growth was analyzed. It was found that the stress intensity factor would be a single parameter to characterize creep crack growth.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Creep Crack Growth Behaviour of Alloy 718

Liu¹,

Yan²,

Yan³

et al. 1991

Superalloys 718, 625 and Various Derivatives (1991)

Self Cite

View full text Add to dashboard Cite

The creep crack growth behaviour of Alloy 718 at 923K has been investigated. It is found that its creep crack growth is controlled by stress intensity factor regardless of load level, loading change and crack growing history. The metallographic analysis indicates that the creep crack growth mechanism of this alloy at 923K comprises three stages. Based on this mechanism, a creep crack growth model has been developed where crack growth rates relate with the effective driving force in sinh function. In addition, the effect of microstructure on the creep crack growth behaviour of Alloy 718 has been studied. The results reveal that the crack growth rates strongly depend on the grain size and the carbide structure. These phenomena have been explained by the diffusion and tearing process in the creep crack growth mechanism.

show abstract

Section: Creep Crack Growth Mechanismmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%