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Keywords: creep
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Journal Articles
Article Type: Research-Article
J. Pressure Vessel Technol. February 2022, 144(1): 011504.
Paper No: PVT-20-1286
Published Online: October 8, 2021
... accident. The materials used previously for SG tubes around the world have been replaced and will be replaced by Alloy 690 given its improved corrosion resistance relative to that of Alloy 600. However, studies of the high-temperature creep and creep-rupture characteristics of SG tubes made of Alloy 690...
Journal Articles
Article Type: Research-Article
J. Pressure Vessel Technol. February 2021, 143(1): 011503.
Paper No: PVT-19-1251
Published Online: August 5, 2020
...Cheng Gong; Fu-Hai Gao; Jian-Guo Gong; Fu-Zhen Xuan An accurate stress estimation for creep evaluation is essential for the long-term safe operation of components at elevated temperature. In general, the section-dependent parameter K t is defined in elastic analysis routine to account...
Journal Articles
Article Type: Research-Article
J. Pressure Vessel Technol. December 2020, 142(6): 061502.
Paper No: PVT-19-1205
Published Online: June 10, 2020
...Tian-Ye Niu; Cheng Gong; Jian-Guo Gong; Fu-Zhen Xuan Notched structures widely exist in steam turbine components in fossil power plant, e.g., the groove of the rotor, etc. Previous studies indicate that creep failures occur at the groove of the rotor or the adjacent regions. Thus, it is essential...
Journal Articles
Article Type: Research-Article
J. Pressure Vessel Technol. August 2020, 142(4): 041701.
Paper No: PVT-19-1146
Published Online: April 8, 2020
...Tian-Ye Niu; Cheng Gong; Jian-Guo Gong; Fu-Zhen Xuan; Haofeng Chen Geometrical discontinuities (such as holes and grooves) widely exist in many components, which operate at elevated temperatures. Creep assessment of the geometrical discontinuities is essential for the safe operation of the system...
Topics: Creep, Steel, Stress
Journal Articles
Article Type: Research-Article
J. Pressure Vessel Technol. December 2019, 141(6): 061406.
Paper No: PVT-18-1197
Published Online: September 20, 2019
...Lin Zhu; Xinbao Liu; Ping Fan; Jianqiu Liu; Chengfei Pan Over the range of variables (temperature and stress) normally encountered in service applications, creep behaviors of 9Cr-1Mo steel were investigated with various models, such as Wilshire model, combination of exponential form and omega (CEO...
Journal Articles
Article Type: Research-Article
J. Pressure Vessel Technol. December 2019, 141(6): 061201.
Paper No: PVT-17-1235
Published Online: August 2, 2019
... in standardized relaxation tests. Within this work, a loss in bolt pretension of up to almost 50% over a comparatively short period of experimental time was observed. By means of numerical calculations, creep deformation in the transition areas between pipe and flange plate sections was identified to be a major...
Journal Articles
Article Type: Review Articles
J. Pressure Vessel Technol. October 2019, 141(5): 050801.
Paper No: PVT-18-1256
Published Online: July 17, 2019
... on the structural strength of the notched components at elevated temperatures under creep, fatigue, and creep-fatigue loading conditions. Experimental phenomena (i.e., strengthening or weakening effects) for typical notched specimens subjected to the above three loading conditions are summarized, and the related...
Journal Articles
Article Type: Research-Article
J. Pressure Vessel Technol. April 2017, 139(2): 021206.
Paper No: PVT-16-1023
Published Online: September 28, 2016
... internally (∼1327 °C), it results in a sudden transition of boiling crisis from nucleate to film boiling. Accordingly, from a structural integrity perspective, the RPV failure mechanisms span a wide range of structural behaviors, such as melt-through, creep damage, plastic deformation as well as thermal...
Journal Articles
Article Type: Research-Article
J. Pressure Vessel Technol. December 2014, 136(6): 061404.
Paper No: PVT-12-1048
Published Online: September 15, 2014
... the stresses have been normalized against the yield stress of the material. There are four main regions of interest. Region E is elastic, where pressure plus thermal stress is always less than the yield stress. Bree stated that creep ratcheting occurs if any combination of applied loading exceeds Region E...
Journal Articles
Article Type: Research-Article
J. Pressure Vessel Technol. August 2014, 136(4): 041407.
Paper No: PVT-13-1158
Published Online: April 16, 2014
... April 16, 2014. Assoc. Editor: Marina Ruggles-Wrenn. 11 09 2013 24 01 2014 Centrifugal cast 25Cr35Ni–Nb alloy furnace tubes with different contents of S are selected to investigate effects of S addition on creep and fracture behavior. Rupture tests in air at 1100 °C and 17 MPa...
Journal Articles
Article Type: Research-Article
J. Pressure Vessel Technol. June 2014, 136(3): 031206.
Paper No: PVT-13-1023
Published Online: February 27, 2014
... o ) 2 + [ exp ( ɛ θ ) - exp ( ɛ θ ' ) ] 2 The total true strain in each direction is thought to be the sum of elastic strain, plastic strain, thermal strain and creep, i.e., (21) ɛ = ɛ e + ɛ p + ɛ t + ɛ c...
Journal Articles
Article Type: Research Papers
J. Pressure Vessel Technol. April 2012, 134(2): 021101.
Published Online: January 19, 2012
...Charles Becht, IV; Charles Becht, V A number of alloys have applications slightly into the creep range that are in cyclic service, such as process reactors. The 2007 edition of Section VIII, Division 2 (2007, ASME Boiler and Pressure Vessel Code, Section VIII, Division 2, The American Society...
Journal Articles
Article Type: Research Papers
J. Pressure Vessel Technol. April 2012, 134(2): 021201.
Published Online: January 11, 2012
...Basil A. Housari; Ali A. Alkelani; Sayed A. Nassar An improved mathematical model is proposed for predicting clamp load loss due gasket creep relaxation in bolted joints, taking into consideration gasket behavior, bolt stiffness, and joint stiffness. The gasket creep relaxation behavior...
Journal Articles
Article Type: Research Papers
J. Pressure Vessel Technol. February 2012, 134(1): 011211.
Published Online: December 7, 2011
... contact stress at gasket outer diameter in consideration of creeps of flanges, bolts and gasket coupled to the axial deformation compatibility equation. The analysis was verified against the finite element numerical simulation considering the nonlinear behavior of gasket and material creep. The analytical...
Journal Articles
Article Type: Research Papers
J. Pressure Vessel Technol. February 2012, 134(1): 011208.
Published Online: December 2, 2011
... to investigate the statistical variation for the anisotropic materials in strain rate effect problem and creep strain program by introducing additional six cubic slip systems into the conventional 12 octahedral slip systems inelastic range. 15 07 2010 29 06 2011 30 06 2011 02 12 2011 02...
Journal Articles
Article Type: Research Papers
J. Pressure Vessel Technol. December 2011, 133(6): 061402.
Published Online: October 31, 2011
...J. Ahmad; J. Purbolaksono; A. K. Kadir; M. M. Rahman This paper presents failure investigation on reheater pendent SA213-T22 tubes through visual inspections, steam-side scale and tube wall thickness measurements, metallurgical examinations, and creep analysis. The investigations were carried out...
Journal Articles
Article Type: Errata
J. Pressure Vessel Technol. October 2011, 133(5): 057001.
Published Online: August 23, 2011
...R. I. Jetter; T.-L. Sham; R. W. Swindeman 23 08 2011 23 08 2011 creep nuclear power stations pressure vessels We are grateful to Dr. Richard N. Wright of the Idaho National Laboratory for the support of this work. We thank Mr. Masanori Ando of the Japan Atomic Energy...
Journal Articles
Article Type: Research Papers
J. Pressure Vessel Technol. October 2011, 133(5): 051206.
Published Online: July 14, 2011
... considerable creep. This phenomenon is significant particularly in cases of turbine blades for power generators, which run almost continuously. Creep strains, in time, lead to deformations resulting in increase of the disk diameter, causing the clearance between blade tips and the turbine’s outer shell...
Journal Articles
Article Type: Research Papers
J. Pressure Vessel Technol. October 2011, 133(5): 051208.
Published Online: July 14, 2011
... temperature up to 950 ° C . An evaluation of creep-fatigue damage, for a prototype PHE, has been carried out from finite element analysis with the full three dimensional model of the PHE. The inlet temperature in the primary side of the PHE was 950 ° C with an internal pressure of 7 MPa, while the inlet...
Journal Articles
Article Type: Research Papers
J. Pressure Vessel Technol. October 2011, 133(5): 051203.
Published Online: July 14, 2011
... into the creep range. These proposed rules use shakedown concepts and a cycle limit as a basis for exemption from fatigue analysis. American Society of Mechanical Engineers , 2007 , ASME Boiler and Pressure Vessel Code, Section VIII, Division 2 . American Society of Mechanical Engineers , 2006 , ASME...