Analysis of creep lifetime of a ASME Grade 91 welded pipe

Besson, Jacques; Leclercq, S.; Gaffard, Vincent; Gourgues-Lorenzon, Anne-Françoise

doi:10.1016/j.engfracmech.2008.12.007

Cited by 18 publications

(9 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In order to describe the creep behaviours of metals and alloys, many researchers have tried to establish constitutive models, such as continuum damage equation and Andrade's equation [11][12][13][14][15][16][17]. For example Authors [11] performed a review on the development and the use of internal state variable theory based on the Coleman and Gurtin thermodynamics formulations for dislocations, creep, and continuum damage mechanics.…”

Section: Introductionmentioning

confidence: 99%

Constituve Modelling for Creep of Drawn Copper Wire

Boumerzoug¹,

Gareh²

2014

Acta Metall Slovaca

View full text Add to dashboard Cite

The high-temperature creep behaviour of drawn copper wire was studied by different constant stresses 98,108 and 118 MPa and under the temperatures of 250, 290 and 340°C. This study deals with the creep based prediction modelling of an industrial copper wire. The proposed unified creep damage constitutive equations were determined using experimental data achieved for materials at applied stress. The comparison of experimental and predicted effective creep strain curves is carried out for all applied stresses applied on the drawn copper wire. The evaluated stress exponent n = 9.21, 10 and 14 and the activation energy Q = 22.25, 31.75 and 50.75 indicated that the creep deformation of the drawn copper wire is controlled by the dislocation creep. The evaluated of the mean relative error from 5.18 % to 10.11 confirmed the creep strain predicted by the proposed model well agree with experimental data.

show abstract

Section: Introductionmentioning

confidence: 99%

Constituve Modelling for Creep of Drawn Copper Wire

Boumerzoug¹,

Gareh²

2014

Acta Metall Slovaca

View full text Add to dashboard Cite

show abstract

“…Recently, with the stress exponent n (n ≈ 4 or 5 for high stress region) increasing, the power law relationship between the minimum creep strain rate and stress will be suitable [11]. For ASME Grade 91 weldments, the transition stress between high stress and low stress level is about 70MPa at 625OC [12].…”

Section: Stress Level Regionmentioning

confidence: 99%

Analyzing the Characteristics of the Cavity Nucleation, Growth and Coalescence Mechanism of 9Cr-1Mo-VNb Steel (P91) Steel

et al. 2013

AMR

View full text Add to dashboard Cite

Abstract. Creep damage is one of the serious problems for the high temperature industries and computational approach (such as continuum damage mechanics) has been developed and used, complementary to the experimental approach, to assist safe operation. However, there are no ready creep damage constitutive equations to be used for predicting the lifetime for this type of alloy, particularly for low stress. This paper presents an analysis of the cavity nucleation, growth and coalescence mechanism of 9Cr-1Mo-VNb steel (P91 type) under high and low stress levels and multi-axial stress state.

show abstract

“…Involvement of environment corrosion, time-dependent creep, and the complex interactions between them makes precise lifetime prediction quite difficult. [24][25][26][27] However, this method has not been adopted in the investigation of welded joint's cyclic behaviour. [11][12][13][14][15] It is worth mentioning that Zhu 12 18 have done some systematic investigations, which are of high value to understand the microstructure evolution during LCF and CFI loadings.…”

Section: Introductionmentioning

confidence: 99%

“…A similar approach was used for magnesium welded joints by Karakas et al 22,23 Additionally, creep damage of ferritic steel welded joints has been investigated a lot by using this method. [24][25][26][27] However, this method has not been adopted in the investigation of welded joint's cyclic behaviour.…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical characterization of low cycle fatigue and creep fatigue behaviour of P92 steel welded joint

Wang

Zhang

Gong

et al. 2017

Fatigue Fract Eng Mat Struct

View full text Add to dashboard Cite

Low cycle fatigue (LCF) and creep fatigue interaction (CFI) behaviour of P92 steel welded joint were investigated experimentally and numerically. Strain‐controlled LCF tests at different strain amplitudes and CFI tests at different peak strain holding time were conducted. Evolutions of cyclic stress response, mean stress, and creep strain during cycling were described, in which the influence of strain amplitude and holding time were investigated. A specific heat treatment process was proposed to get the homogenous simulated material of fine grain region and coarse grain region in the heat affected zone. Material parameters of parent material, fine grain heat affected zone, coarse grain heat affected zone, and weld metal in the unified viscoplasticity model were then determined and validated. To predict the LCF and CFI behaviour of welded joint, 3‐dimensional unified viscoplasticity model with a modified isotropic variable was compiled into ABAQUS UMAT. The comparison between the predicted and experimental result under LCF and CFI loadings showed that the simulation results were reasonable and agreed with the experimental data well.

show abstract

Analysis of creep lifetime of a ASME Grade 91 welded pipe

Cited by 18 publications

References 44 publications

Constituve Modelling for Creep of Drawn Copper Wire

Constituve Modelling for Creep of Drawn Copper Wire

Analyzing the Characteristics of the Cavity Nucleation, Growth and Coalescence Mechanism of 9Cr-1Mo-VNb Steel (P91) Steel

Experimental and numerical characterization of low cycle fatigue and creep fatigue behaviour of P92 steel welded joint

Contact Info

Product

Resources

About