Description of creep and creep fatigue crack growth in 1% and 9% Cr steels

Maile, Karl; Schellenberg, G.; Granacher, J.; Tramer, M.

doi:10.1080/09603409.1998.11689591

Cited by 4 publications

(5 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In order to evaluate the creep crack initiation at cracklike defects, the C*-parameter concept [29] can be used if creep is the dominating process ahead the crack front. The parameter C* is a path independent integral based on energy balance considerations.…”

Section: Creep Crack Initiation and Damage Developmentmentioning

confidence: 99%

“…The effectiveness of the parameter C* was demonstrated for an IP-turbine rotor with an internal defect [29]. It is assumed that this rotor contains an elliptical defect (c = 15.63 mm, a = 6.25 mm).…”

Section: Creep Crack Initiation and Damage Developmentmentioning

confidence: 99%

“…Discretization of a segment in the centre of an IP-turbine rotor with an assumed internal defect, 1CrMoNiV steel [29].…”

Section: Figure 10mentioning

confidence: 99%

See 2 more Smart Citations

The use of advanced-creep data for new plant development and design, and for the exploitation of new materials

Berger¹,

Schwienherr²,

Scholz³

2004

Mat. at High Temp.

View full text Add to dashboard Cite

Advanced design methods contribute to the effective long term operation of high temperature components and guarantee low technical risk and high economical advantages. Along with the generation of advanced creep data, modelling and scatterband analyses are necessary to generate design curves and lower bound properties inclusive. Besides, in order to develop life prediction methods variable creep experiments lead to properties for single-stage and multi-stage loading. Further, the knowledge of multiaxial creep behaviour is of high future interest. The development of methods to transfer uniaxial material properties to multi-axial loading situations is a current challange. Different methods are established in order to describe creep crack initiation as well as crack propagation. A knowledge of the influence of creep processes on tolerance to pre-existing defects promotes the long term usability of components.

show abstract

Section: Creep Crack Initiation and Damage Developmentmentioning

confidence: 99%

Section: Creep Crack Initiation and Damage Developmentmentioning

confidence: 99%

See 1 more Smart Citation

The use of advanced-creep data for new plant development and design, and for the exploitation of new materials

Berger¹,

Schwienherr²,

Scholz³

2004

Mat. at High Temp.

View full text Add to dashboard Cite

show abstract

“…In assessing structural integrity of high-temperature power-plant components, it is essential to understand crack initiation and growth behaviour under creep and creep-fatigue loadings. High-temperature crack initiation and growth behaviours of a Grade 91 steel under constant load have been investigated by many researchers [1][2][3][4][5][6][7][8][9][10]. It is known that the creep crack initiation time and growth rate can be correlated with the time-dependent fracture mechanicsC * -integral [11][12][13][14][15][16][17][18].…”

mentioning

confidence: 99%

“…Under creep-fatigue cyclic loading condition, the interaction of creep and fatigue is involved in the crack initiation and growth. Creep-fatigue crack growth tests have been extensively performed [3,[19][20][21][22][23][24][25][26][27][28][29], but most of the tests were conducted under tension-tension creep-fatigue loading condition [3,[21][22][23][24][25][26][27]29]. On the other hand, creep-fatigue crack growth tests under tension-compression creep-fatigue loading are limited [19][20]28].…”

mentioning

confidence: 99%

Effect of Creep-Fatigue Loading Condition on Crack Tip Fields of Grade 91 Steel at Crack Initiation and Growth

Jung

Kim

Takahashi

2020

Preprint

View full text Add to dashboard Cite

In this paper, the effect of creep-fatigue loading condition on crack tip deformation and stress fields of Grade 91 steel at 600 o C at crack initiation and growth is studied. By using finite element debond analysis method, creep-fatigue crack growth tests using C(T) specimens under various load ratios and hold times are simulated, and the effect of creep-fatigue load ratio and hold time on the plastic zone, creep zone, crack opening profile, equivalent stress, crack-opening stress and triaxiality at crack initiation and growth is presented. It is found

show abstract

Influence of Extra Coarse Grains on the Creep Properties of 9 Percent CrMoV (P91) Steel Weldment

Sandström

Seitisleam

2004

Journal of Engineering Materials and Technology

View full text Add to dashboard Cite

With modern welding methods, satisfactory microstructures in 9%CrMoV (P91) steel can be obtained with a modest variation in hardness and prior austenite grain size. However, there is always a risk that significant deviations in the properties can be obtained, if the welding parameters are not optimized. In the present paper the role of extra coarse grains in the heat affected zone (HAZ) has been studied. Creep tests were carried out at 600°C for parent metal, weld metal, cross weld, simulated extra coarse grained HAZ, and simulated intercritical HAZ of a 9%CrMoV (P91) steel. The parent metal, the cross welds, the weld metal, and the simulated intercritical HAZ had about the same rupture strength except at long rupture times, where the values for the cross welds were considerably lower. In the cross welds, rupture took place in the intercritical HAZ at longer times (Type IV cracking). The simulated extra coarse grains gave considerably longer rupture times, lower strain rate and lower creep ductility than the parent metal and the weld metal. The creep strain behavior was successfully analyzed using the Omega model where the log creep strain rate is linear in the creep strain.

show abstract

Description of creep and creep fatigue crack growth in 1% and 9% Cr steels

Cited by 4 publications

References 3 publications

The use of advanced-creep data for new plant development and design, and for the exploitation of new materials

The use of advanced-creep data for new plant development and design, and for the exploitation of new materials

Effect of Creep-Fatigue Loading Condition on Crack Tip Fields of Grade 91 Steel at Crack Initiation and Growth

Influence of Extra Coarse Grains on the Creep Properties of 9 Percent CrMoV (P91) Steel Weldment

Contact Info

Product

Resources

About