... on the Critical Pressure of Pipeline ,” Eng. Failure Anal. , 21 , pp. 40 – 51 . 10.1016/j.engfailanal.2011.11.011 X52 hydrostatic test yield strength spiral weld crack nozzle repair Since the early 1950s, hydraulic pressure test has been used by pipeline industry to eliminate any defects...

... of a section) from an internal frame of steam turbine serviced for about 250,000 h. Performed research has proven that through the microstructure degradation long-term service contributes to an embrittlement and decrease in yield strength and tensile strength. The heat treatment, however, contributes...

... engineering nuclear power stations pipes pressure vessels reliability safety steel yield strength design earthquake LRFD nuclear piping primary stress reliability The design by rule of Class 2 and 3 pipes in the ASME B&PV code, NC-, ND-3600 ( 1 ), is based on the allowable...

... small scale yielding, this study clearly shows that FAD curves are not influenced by negative biaxial loading at low load (up to 40% of yield strength). It was clearly confirmed that the majority of previously developed analytical FAD curves do not effectively account for notch and plasticity effects...

...P. S. Lam; R. L. Sindelar; A. J. Duncan; T. M. Adams A compendium of mechanical properties of carbon and low alloy steels following hydrogen exposure has been assembled from literature sources. The property sets include yield strength, ultimate tensile strength, uniform elongation, reduction...

... predicts the hydrogen concentration required to initiate HAC as a function of the applied stress intensity factor and yield strength of the steel. Hydrogen-induced reduction in R was found to dominate HAC in the 4140 steel, while hydrogen-induced reduction in R was combined with an increase in G for HAC...

.... The proposed design formulas are given in terms of the yield strength of the material and address the fatigue strength at the location of the maximum stress concentration factor. Introduction of these new formulas in a nonmandatory appendix of Section VIII, Division 3 is recommended after committee approval...

..., data are needed to guide the selection of materials for structural components. The objective of this study is to characterize the role of yield strength, microstructural orientation, and small concentrations of ferrite on hydrogen-assisted fracture in two austenitic stainless steels: 21Cr–6Ni–9Mn (21-6...

..., and their amplitude ranged from 0.3 mm to 1.0 mm . Tension coupon tests were conducted on the intrados, extrados, and virgin materials of the specimens. It was revealed that the extrados material exhibited an increase in yield strength due to work hardening and that the intrados material demonstrated a reduction...

... of restraint condition applied during welding, the start and end of the weld for a single bead, and increasing the number of passes. The measured residual stress distributions are normalized by the yield strength of the material and compared with distribution provided in fitness-for-purpose procedures...

... yield strength High-pressure feedwater circulating in the tubes of closed feedwater heaters may be at pressures as high as ∼ 27,500 KPa ( ∼ 4000 psig ) . The pressure depends on the type of power station and position of the heater...

... deformation behavior of thick-walled cylinders during both loading and unloading phases. Strain hardening may occur during loading, and reverse yielding may occur during unloading at a yield strength significantly reduced due to the Bauschinger effect. Three different models for the reverse hardening...

...Shyh-Jen Wang The relationship of torque versus angle of rotation stabilizes after only a few cycles so that the alternating stress will become a constant as long as the maximum shear stress is less than the shear yield strength of the material. Using this information in Findley‘s fatigue criterion...

...J. Perry; M. Perl; R. Shneck; S. Haroush The Bauschinger effect (BE) was originally defined as the phenomenon whereby plastic deformation causes a loss of yield strength restraining in the opposite direction. The Bauschinger effect factor (BEF), defined as the ratio of the yield stress on reverse...

...Hamid Jahed; Babak Ahmadi Moghadam; Mojtaba Shambooli Loading, unloading, and reloading behavior of high-strength steel AISI 4340 (with yield strength of 1080 MPa ) has been measured using the round bar specimen and method described in ( Jahad, H., and Ghanbari, G., 2003, ASME J. Pressure Vessel...

... be quantified. Experimental and actual plant data of CGR for alloy 600 in PWR primary water, which are sometimes scattered in CGR- K diagrams, are interpreted with the generalized CGR formulation, emphasizing the effects of temperature, K , yield strength and variations of K with time. It is suggested...

... products yield strength finite element analysis hardening plastic deformation walls Plastic Collapse Plastic Failure Pipeline Weld Joint Unequal Wall Integrity Assessment Pipeline construction often involves situations where two components with unequal wall thickness and different...

... characterize the influence of Y ∕ T on the failure behavior of pipeline. 27 08 2003 01 06 2005 yield strength pipelines plastic deformation work hardening corrosion fatigue mechanical stability stress-strain relations It is well known that the yield-to-tensile strength ratio...

... yield strength are of similar shape and magnitude when normalized appropriately and peak stresses are on the order of the material yield strength. The resultant linear elastic stress intensity factors for these stress distributions have been obtained using the finite element method. It has been shown...

... may be improved by a factor of between 2 and 30, depending upon tube geometry and the ratio of cyclic pressure to yield strength. Repeated overload plus heat soak cycles may also be of benefit in other engineering design scenarios. Contributed by the Pressure Vessels and Piping Division...