Showing papers in "International Journal of Pressure Vessels and Piping in 2008"

TL;DR: In this article, the authors have demonstrated that long-term microstructure stability in 9-12% Cr steels under technical loading conditions is equivalent to precipitate stability and that high Cr contents of 10% and above in the steels accelerate Z-phase precipitation, which may completely dissolve fine V and Nb containing MX nitrides.

TL;DR: In this paper, the capabilities of newly emerging destructive (i.e., the contour method) and non-destructive residual stress measurement techniques for evaluating ferritic and austenitic pressure vessel components are contrasted against more well-established methods.

TL;DR: In this article, the reliability of pipelines with corrosion defects subjected to internal pressure using the first-order reliability method (FORM) is defined based on the results of a series of small-scale experiments and three-dimensional nonlinear finite element analysis of the burst pressure of intact and corroded pipelines.

TL;DR: In this paper, the authors discussed the nature of residual stresses in welded structures in terms of their magnitude, directionality, spatial distribution, range and variability, and the effects of the following factors on the residual stresses: material properties, material manufacture, structural geometry, fabrication procedure, welding procedure, post-weld treatments and service conditions.

TL;DR: In this paper, the authors present information on properties, behaviour and workability with a focus on elevated temperature properties and allowable stresses, oxidation and maximum service temperature and weldability procedures and recommendations.

TL;DR: In this paper, a relatively new method has been developed to stop external corrosion and structurally reinforce steel pipes by external wrapping of damaged sections using fibre reinforced polymer (FRP) materials Several different defect geometries representing corrosion patches on steel pipe were characterized using finite-element analysis.

TL;DR: In this paper, microstructures of dissimilar metal welds composed of low alloy steel, Inconel 82/182 weld, and stainless steel were prepared by gas tungsten arc welding and shielded metal arc welding techniques.

TL;DR: In this paper, a constitutive model integrating anisotropic behavior and ductile damage for a X100 pipeline steel was developed based on a set of experiments on various smooth, notched and cracked specimens and on a careful fractographic examination of the damage mechanisms.

TL;DR: In this article, the Gurson-Tvergaard-needleman (GTN) model was used to investigate ductile tearing and the sensitivity of the model parameters has been examined from literature data.

TL;DR: In this paper, the effect of welding sequence on welding deformations in pipe-pipe joints of AISI stainless-steel type was investigated using three-dimensional thermo-mechanical analysis.

TL;DR: In this paper, a series of creep-fatigue tests for three types of high-chromium steels used in fossil power plants and the applicability of life prediction methods has been studied.

TL;DR: In this article, an implicit method of characteristics is proposed to alleviate the shortcomings and limitations of the mostly used conventional Method of Characteristics (MOC), which allows for any arbitrary combination of devices in the pipeline system.

TL;DR: In this paper, the oxidation characteristics of Alloy 617, a candidate structural material for the key components in the very high-temperature gas-cooled reactor (VHTR), were investigated.

TL;DR: In this paper, the reliability of non-destructive test (NDT) techniques for inspection of pipeline welds employed in the petroleum industry was evaluated, and the results showed the superiority of automatic ultrasonic tests for defect detection compared with the manual ultrasonic and radiographic tests.

TL;DR: In this paper, an analytical method was developed to obtain the solution for the two-dimensional ( r, θ ) steady state thermal and mechanical stresses in a hollow thick sphere made of functionally graded material.

TL;DR: In this paper, the deformation and damage processes were related through Monkman Grant relationship and modified Monkman grant relationship, and the results were compared with the properties of 20% cold worked type 316 stainless steel (316 SS) clad tubes.

TL;DR: In this article, low-cycle fatigue tests with continuous cycling and creep-fatigue tests with 10min hold times at tensile maximum strain were conducted at 600 °C in air for Type 316L and Type 316lN stainless steels containing nitrogen contents of 004% and 010% respectively.

TL;DR: In this article, a mixed layerwise theory and differential quadrature (DQ) method was proposed for three-dimensional free vibration analysis of arbitrary laminated circular cylindrical shells.

TL;DR: In this paper, the applicability and effectiveness of a range of model equations to represent the accumulation of creep strain in various engineering alloys was reviewed during the course of the EU-funded Advanced-Creep Thematic Network, ECCC-WG1.

TL;DR: In this paper, the effects of cyclic loading on the hydrogen concentration near the crack tip of a metal were discussed. And the results showed that the fatigue lives of the components in a hydrogen system depend not only on the number of loading cycles but also on the loading frequency.

TL;DR: In this paper, a traction-based stress separation procedure is presented to provide a consistent characterization of stresses from various sources based on their length scale. But the analysis and treatment of secondary stresses associated with welding and thermal loading in the context of fracture mechanics is not addressed.

TL;DR: In this article, the authors used light optical, scanning electron and transmission electron microscopy to detect micro-structural modification in specimens exposed to high temperature and found that the major microstructural features were identified to be the presence of inter-and/or intragranular particles ((Cr,Mo,Fe) 23 C 6 and other types of carbides, δ -Ni 3 Mo and γ ′-Ni 3 (Al,Ti)) that clearly played an important role in the mechanical behaviour of the alloy.

TL;DR: Theoretical and numerical methods are used for stress-strain analysis of rotating discs with non-uniform thickness and density in this paper, where an elastic-linear hardening material is assumed.

TL;DR: In this paper, normal creep curves are recorded over tensile stress ranges giving creep lives up to about 1000h or more for 0.5Cr-0.5Mo−0.25V bainitic steel, 316L austenitic steel and 14% Cr ferritic steel, Incoloy MA957.

TL;DR: In this article, the overall fracture energy of X70 steel is measured experimentally on an instrumented Charpy rig and the measured energy is divided into fracture initiation and propagation parts using load-displacement data.

TL;DR: In this paper, the failure pressure of pipe with wall thinning was investigated by using three-dimensional elastic-plastic finite element analyses (FEA) with careful modeling of the pipe and flaw geometry in addition to a proper stress-strain relation of the material, FEA could estimate the precise burst pressure obtained by the tests.

TL;DR: In this article, a new approach to analysis of stress rupture data allows rationalization, extrapolation and interpretation of multi-batch creep life measurements reported for ferritic 1Cr-0.5Mo tube steel.

TL;DR: In this paper, a finite element analysis of the brazed residual stresses and creep for a counterflow stainless-steel plate-fin structure is presented, which provides a reference for strength design.

TL;DR: In this paper, two powerful analytical methods, namely homotopy perturbation method (HPM) and Adomian's decomposition method (ADM), are introduced to obtain distributions of stresses and displacements in rotating annular elastic disks with uniform and variable thicknesses and densities.