... pressure creep tests were conducted on P91 steel longitudinal welded tubes to characterize the evolution of creep damage with time and to evaluate a life prediction method. Interrupted creep tests were performed for damage observation in addition to rupture tests. Three dimensional finite element creep...

... creep creep testing fatigue cracks fatigue testing welding An assessment of creep-fatigue crack initiation and growth is of key importance for the evaluation of a high temperature structural integrity of a reactor structure such as the liquid metal reactor KALIMER (Korea advanced liquid...

... the processes and mechanisms of Type IV creep damage using Mod.9Cr–1Mo (ASME Grade 91) steel weldments. Long-term creep tests for base metal, simulated fine-grained HAZ, and welded joints were conducted at 550 ° C , 600 ° C , and 650 ° C . Furthermore, creep tests of thick welded joint specimens were...

...S. Peravali; T. H. Hyde; K. A. Cliffe; S. B. Leen Past studies from creep tests on uniaxial specimens and Bridgman notch specimens, for a P91 weld metal, showed that anisotropic behavior (more specifically transverse isotropy) occurs in the weld metal, both in terms of creep (steady-state) strain...

.... Positive nonlinear rate sensitivity was observed in monotonic loading. Creep response was found to be significantly influenced by prior stress rate. The effect of loading history on creep was studied in stepwise creep tests, where specimens were subjected to a constant stress rate loading followed...

... similar to those used for creep testing). At 500 – 600 ° C , 2.25 Cr - 1 Mo steels showed a superior oxidation resistance than 1.25 Cr - 0.5 Mo steels. However, at 700 ° C , the oxidation resistance of 1.25 Cr - 0.5 Mo and 2.25 Cr - 1 Mo steels was similar. Multilayer oxide formation was observed to occur...

... when acquiring data under field conditions. For the precise creep damage prediction, it will be necessary to have a database from the real boiler piping as well as for creep test specimens. The parameter fluctuation becomes small after the middle stage of the creep damage process. It is considered...

... the background for the rules. Basis for weld factors (see Table 1 ) Low carbon welds with higher carbon base material (see Table 1 ) 19 07 2005 10 10 2005 code standards creep fracture creep testing weld strength creep ASME B31.3 weldment creep rupture...

... 2004 stress analysis failure analysis pipelines creep elastoplasticity finite element analysis creep testing geometry pressure vessels Assessment of failure strength for a pipe with local wall thinning is an issue in many pipeline industries, such as gas industries and nuclear...

... displacements and updated pressure are taken into account, while at lower temperatures coupling between damage and deformation is necessary. Examples based on some RUPTHER creep test predictions are given. OECD-NEA-TM12, 1993, “ TMI-2 Vessel Investigation Project ,” Appendix A, OCDE-NEA TMI V(93)EG01 report...

.... , Ukai , S. , and Onose , S. , 1999 , “ Post Irradiation Creep Rupture Properties of FBR Grade 316 S.S. ,” J. Nucl. Mater. , 271&272 , pp. 173 – 178 . Gilbert , E. R. , and Harding , N. E. , 1969 , “ Comparison of In-Reactor Creep and Postirradiation Creep Tests of Structural...

...Levi O. Bueno; Luiz Marino The oxide-scale growth and metal loss kinetics during oxidation in air of 2 1/4 Cr-1 Mo steel were studied at 600, 700, and 800°C for times up to 1000 h, with cylindrical specimens similar to creep test pieces. The scale thickness (x) was observed to exhibit a gradually...

..., 2000; revised manuscript received October 23, 2000. Editor: S.Y. Zamrik. boilers pressure vessels creep testing fatigue testing steel alloy steel molybdenum alloys chromium alloys elasticity plasticity tensile strength Creep cavity and crack initiation incidents in boiler...

... July 2000 pressure vessels fracture mechanical engineering computing mechanical testing creep testing strain measurement With the availability today of powerful personal computers and the easier access to inelastic finite element programs, pressure component designers now have...

... . Manuscript received by the PVP Division, April 8, 1998; revised manuscript received July 6, 2000. Technical Editor: S. Y. Zamrik. 08 April 1998 06 July 2000 creep creep testing pressure vessels Creep Larson-Miller Parameter Data Analysis Life Distribution Least-Squares Method...

... for the specimen. Typically, these enabled the creation of specimens of 1/2 in. by 50 to 75 percent of full wall dimension. The resulting cross section was sufficiently large to give an adequate sample cross section for reproducible creep testing. Replicate tests of three or more specimens typically gave...

... ENGINEERS . Manuscript received by the PVP Division, August 15, 1999; revised manuscript received October 19, 1999. Technical Editor: S. Y. Zamrik. 01 August 1999 15 August 1999 19 October 1999 thermal stresses stress relaxation turbines high-temperature effects creep testing...

... creep testing high-temperature techniques finite element analysis stress relaxation notch testing heat treatment In many components operating at high temperatures, there are inevitably geometrical discontinuities. These discontinuities have a strong effect on the material fatigue life due...

... . Hyde , T. , and Sun , W. , 1997 , “ Stress Singularities at the Free Surface of an Axisymmetric Two-Material Creep Test Specimen ,” J. Strain Anal. , 32 , No. 2 , pp. 107 – 117 . Sandstrom , R. , and Tu , S. , 1994 , “ The Effect of Multiaxiality on the Evaluation of Weldment...

... . Manuscript received by the PVP Division, August 20, 1997; revised manuscript received October 11, 1999. Associate Technical Editor: M. B. Ruggles. 27 July 1997 20 August 1997 11 October 1999 pressure vessels high-temperature effects creep testing supports austenitic stainless...