A comparison of three weld consumables for P92 under creep

Tanner, David; Chalk, K.; Sun, Wei; Shipway, P.H.; Hyde, T H

doi:10.1179/096034012x13493686385559

Cited by 1 publication

(2 citation statements)

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“…Due to lack of available experimental data in the literature for creep crack incubation times for 0.1mm of growth, the comparison [2,43] was made for only 0.2mm. It is noteworthy that creep crack incubation time reduced when larger loads were applied which for both the un-aged and aged consistent with previously represented data [2,43]. However, as shown for the 0.2mm incubation in Fig.…”

Section: 3creep Crack Incubationmentioning

confidence: 99%

“…where is the Monkman-Grant constant and is material property, normally equal to unity. It can be argued that the mechanism of creep deformation and fracture are essentially the same at that specific test condition, if the material obeys this relationship [43]. By plotting minimum creep strain rate against the rupture time for both un-aged and aged P92 steel, Monkman-Grant parameters can be derived, as shown in Fig.…”

Section: Monkman-grant Analysismentioning

confidence: 99%

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Influence of thermal ageing on the creep behaviour of a P92 martensitic steel

Khayatzadeh

Flewitt

Smith

et al. 2017

Materials Science and Engineering: A

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It is well established that thermal ageing reduces the life of engineering components operating at elevated temperature. However, there is still not an accurate approach to estimate the change in the service life as a result of thermal ageing of the material. In this study, the effect of accelerated thermal ageing, for a thousand hours prior to creep testing at a temperature of 650 ℃ for a martensitic P92 steel has been compared to un-aged steels. The effect of thermal ageing on a primary-secondary stress dependent creep model has been explored, by conducting a set of uniaxial creep experiments on both un-aged and aged P92 steel. It was observed that thermal ageing enhanced the creep deformation for a narrow range of stresses, and systematically reduced the creep rupture life. These applied for conditions by up to a quarter of the original life. Results from creep crack growth tests for similarly aged material reduced incubation time and accelerated the crack growth rate. However, creep stress relaxation tests revealed no evidence of the influence of thermal ageing on rate of relaxation

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