Corrosion Fatigue Crack Growth Rate for Petroleum Refining Pressure Vessel Materials (2.25Cr-1Mo Steel)

Taketomi, Shinya; Yokobori, A. T.; Takei, K.; Wada, Yasuhiko; Tanaka, Yasuhiko; Iwadate, Tadao

doi:10.5006/1.3278512

Cited by 2 publications

(5 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These results show the effect of stress wave form on anodic dissolution was not so remarkable for materials with lower value of τ 0 * (ductile materials), however this effect becomes remarkable with increase in the resistant stress of dislocation motion, τ 0 * which corresponds to the yield stress. It is promoted under Slow-Fast stress wave condition which is in good agreement with experimental results (41) .…”

Section: Considerationssupporting

confidence: 79%

The Effect of the Interaction between Dislocations and Hydrogen Around a Crack Tip on Hydrogen Embrittlement Under Cyclic Loading Condition

Taketomi

Yokobori

Takagi

2007

JMMP

View full text Add to dashboard Cite

For steels with lower yield stress, transgranular facet like fracture sometimes occurs under corrosive conditions. The occurrence mechanism of the transgranular facet like fracture has been analytically clarified under constant stress rate condition based on the concept of mechanical interaction between dislocations and hydrogen. In this paper, the analyses of the mechanical interaction between dislocations and hydrogen around a crack tip under cyclic loading condition were conducted to clarify the effect of stress wave forms on the feasibility of hydrogen embrittlement. This analysis showed the typical pile-up of dislocations occurs at the site of hydrogen similar as that under monotonous applied loading condition. Concerning the concentration of dislocations at the site of hydrogen atom, the dislocation pile-up intensity factor amplitude ∆A and power coefficient value of the singularity of dislocation density n were defined. ∆A under fatigue condition was found to concern the feasibility of the occurrence of facet like fracture due to dislocation pile-up caused by the interaction between dislocations and hydrogen. Furthermore, the condition of Fast-Slow stress wave form was found to promote the facet like transgranular fracture as compared with that of Slow-Fast stress wave form.

show abstract

Section: Considerationssupporting

confidence: 79%

The Effect of the Interaction between Dislocations and Hydrogen Around a Crack Tip on Hydrogen Embrittlement Under Cyclic Loading Condition

Taketomi

Yokobori

Takagi

2007

JMMP

View full text Add to dashboard Cite

show abstract

“…Experiments of corrosion fatigue crack growth rate were conducted under 3.5% NaCl aq and at the temperature 4 • C [20]. The characteristics of crack growth rate were shown in Fig.…”

Section: The Comparison Of the Results Of Analyses With Experimental mentioning

confidence: 99%

“…The characteristics of crack growth rate were shown in Fig. 11 [20]. The vertical axis is crack growth rate and the horizontal axis is stress intensity factor amplitude.…”

Section: The Comparison Of the Results Of Analyses With Experimental mentioning

confidence: 99%

“…The vertical axis is crack growth rate and the horizontal axis is stress intensity factor amplitude. The plateau characteristic which is the characteristic of hydrogen embrittlement dominant crack growth rate appeared [20].…”

Section: The Comparison Of the Results Of Analyses With Experimental mentioning

confidence: 99%

“…The environmental acceleration factor D * is given by Eq. (10) [20,21]. where da/dN | CF is crack growth rate under corrosion fatigue condition and da/dN | air is crack growth rate under atmospheric condition.…”

Section: The Comparison Of the Results Of Analyses With Experimental mentioning

confidence: 99%

See 2 more Smart Citations

Hydrogen concentration behavior around a crack tip under the constant wind rate condition simulated to a moving crack with constant rate

Ohmi

Yokobori²

2010

Strength, Fracture and Complexity

View full text Add to dashboard Cite

Clarification of the hydrogen diffusion behavior in the metal is important for prevention of hydrogen embrittlement fracture. Previously, some numerical analysis has been performed about hydrogen diffusion behavior under local stress fields by using Finite Element Method or finite difference method. On the other hand, the fatigue crack growth in air, that is, in inert atmosphere, has original speed. However, there is few analysis of hydrogen diffusion behavior including original fatigue crack growth speed. In this research, the effect of crack growth rate on hydrogen diffusion behavior around a crack tip under fatigue condition was clarified based on the numerical analysis and these analyses were conducted under various yield stress. The crack growth speed was modeled by giving uniform flow velocity to the hydrogen distribution in the whole analytical area. The upwind difference method was used for uniform flow velocity. The analytic results were compared between upwind difference and central difference.

show abstract

Corrosion Fatigue Crack Growth Rate for Petroleum Refining Pressure Vessel Materials (2.25Cr-1Mo Steel)

Cited by 2 publications

References 4 publications

The Effect of the Interaction between Dislocations and Hydrogen Around a Crack Tip on Hydrogen Embrittlement Under Cyclic Loading Condition

The Effect of the Interaction between Dislocations and Hydrogen Around a Crack Tip on Hydrogen Embrittlement Under Cyclic Loading Condition

Hydrogen concentration behavior around a crack tip under the constant wind rate condition simulated to a moving crack with constant rate

Contact Info

Product

Resources

About