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creep-rupture failure

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Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.fdmht.t52060021
EISBN: 978-1-62708-343-0
...Abstract Abstract This chapter focuses on creep-rupture failure, or more precisely, the time required for such a failure to occur at a given stress and temperature. It begins with a review of creep-rupture phenomena and the various ways creep-rupture data are presented and analyzed...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.fibtca.t52430149
EISBN: 978-1-62708-253-2
...× Fig. 6.42 Structures at a glance: (a) normal pearlitic, 200×; (b) spheroidized, 100×; (c) graphitized, 100× Fig. 6.34 (a) Microstructure of fracture edge with grains of ferrite and creep crack along with oriented creep cavities, 400×; (b) normal ferrite-pearlite structure away from failure...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1989
DOI: 10.31399/asm.tb.dmlahtc.t60490183
EISBN: 978-1-62708-340-9
... The strength of a boiler tube depends on the level of stress as well as on temperature when the tube-metal temperatures are in the creep range. Because an increase in either stress or temperature can reduce the time to rupture, attention must be given to both factors during investigation of a failure...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.mmfi.t69540047
EISBN: 978-1-62708-309-6
... with creep and stress rupture, stress corrosion, and hydrogen embrittlement. brittle fracture ductile fracture ductility residual stress stress-strain curve THE THREE TYPES OF IDEAL SUBSTANCES (as discussed in Chapter 1 ) are the Hooke solid, the St. Venant solid, and the Newtonian liquid...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 November 2013
DOI: 10.31399/asm.tb.uhcf3.t53630237
EISBN: 978-1-62708-270-9
... occur at elevated temperatures (with the obvious exception of low-temperature brittle fracture). Elevated-temperature problems are real concerns in industrial applications. The principal types of elevated-temperature failure mechanisms discussed in this chapter are creep, stress rupture, overheating...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1989
DOI: 10.31399/asm.tb.dmlahtc.t60490329
EISBN: 978-1-62708-340-9
... °F) and pressures of 27.6 MPa (4000 psi) ( Ref 2 and 3 ). Component-failure scenarios consider not only the conditions for steady operation but also those that apply during start-stop transients. The mechanical behavior considered includes such properties as fracture toughness, resistance to creep...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1989
DOI: 10.31399/asm.tb.dmlahtc.t60490265
EISBN: 978-1-62708-340-9
... been found, however, in the bore of any class of rotor. Rim Cracking The first reported rim failure occurred in the first reheat disk in an IP turbine. This failure occurred by creep-rupture due to the low ductility of the steel. This form of cracking was also identified in IP rotors at two...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1989
DOI: 10.31399/asm.tb.dmlahtc.9781627083409
EISBN: 978-1-62708-340-9
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.fdmht.t52060083
EISBN: 978-1-62708-343-0
... difference (for a constant CP strain) is a little over a factor of 3×. Since the ductility for materials tending toward intercrystalline failure is also lower than those displaying transcrystalline failure in creep rupture, it can be seen that for the same strain range, the difference in fatigue life...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.stg2.t61280339
EISBN: 978-1-62708-267-9
.... With a specific criterion of 1000 h creep-rupture failure at 21.8 ksi (150 MPa), wrought and cast alloys (with PC, CGDS, and SCDS indicated) are compared. In general, this plot conforms to Fig. 15.2 and 15.3 . Fig. 15.4 Temperature-strength capability of selected nickel-base superalloys as a function...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1989
DOI: 10.31399/asm.tb.dmlahtc.t60490383
EISBN: 978-1-62708-340-9
... failures when the test temperature is 600 °C (1110 °F). Creep-rupture test results of Haneda et al are somewhat at variance with the conclusions of Townsend inasmuch as no significant reduction of rupture strength for the weldment was noted at 600 °C (1110 °F) for P91 steel (see Fig. 8.15 ) ( Ref 54...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1989
DOI: 10.31399/asm.tb.dmlahtc.t60490415
EISBN: 978-1-62708-340-9
... in area, % 2 2 0 (a) 50% increase. Estimated uncertainty factors in life prediction Table 9.4. Estimated uncertainty factors in life prediction Cause of uncertainty Factor of uncertainty (a) Creep-rupture life Thermal-fatigue life Factor Basis of estimate...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610415
EISBN: 978-1-62708-303-4
...) and (c) Stress-rupture voids near the fracture. Source: Ref 6 Fig. 17 High-temperature failure modes. Source: Ref 7 Fig. 18 Intergranular failure in nickel-base alloy. Inconel 751, stress rupture at 1350 °F, 55 ksi, 125 h. Source: Ref 8 Fig. 19 Creep cavitation...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2008
DOI: 10.31399/asm.tb.emea.t52240265
EISBN: 978-1-62708-251-8
... Against Creep Acknowledgments References References 1. Creep and Stress-Rupture Failures , Failure Analysis and Prevention , Vol 11 , ASM Handbook , ASM International , 2002 2. Monkman F.C. and Grant N.J. , Proceedings ASTM 56 , American Society for Testing...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1989
DOI: 10.31399/asm.tb.dmlahtc.t60490059
EISBN: 978-1-62708-340-9
... correlation between time to failure and creep-crack-growth rate for gas-turbine disk alloys ( Ref 8 ). Fig. 3.24. Creep-crack-growth behavior of ferritic steel base metal ( Ref 149 ). Fig. 3.27. Effect of temperature on crack-growth rate for a 1Cr-½Mo steel ( Ref 151 ). Fig. 3.28...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.fibtca.t52430409
EISBN: 978-1-62708-253-2
... to exposure to high temperature under stress within the creep range. There is a minimum value of thickness below which a tube will experience stress-rupture failure if subjected to continued service at a given stress level. Therefore, maximum allowable reduction in tube wall thickness can be used...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.stg2.t61280323
EISBN: 978-1-62708-267-9
.... 14.16 Blade root failure, owing to low ductility of polycrystalline cast MAR-M-200 nickel-base superalloy Example 5: Fracture in Creep Owing to Low Ductility Figure 14.16 shows the attachment section of a turbine blade that failed, owing to insufficient rupture ductility during creep...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.stg2.t61280211
EISBN: 978-1-62708-267-9
..., % 7 3 Stress rupture 1800 °F/29,000 psi (982 °C/200 MPa) Life, h 35 30 Elongation, % 7 5 Creep rupture 1400 °F/94,000 psi (760 °C/648 MPa) Life, h 75 25 Prior creep (a) , % 2.5 1.3 (a) Prior creep: % creep not more than 2 h prior to failure Tensile properties...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.fdmht.t52060001
EISBN: 978-1-62708-343-0
... , the creep rate accelerates, and the curve becomes concave upward, and rupture (failure) is imminent at C 3. This stage of creep deformation is referred to as third-stage or tertiary creep. Curve 4 : This curve represents an extreme case. There is a very little steady-state (secondary) creep regime...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.fdmht.t52060173
EISBN: 978-1-62708-343-0
... creep 0.34 Material constants for fatigue strain vs. cycles to failure C 0.014 d 0.186 Material constants for simple constitutive law A c 1.33 × 10 23 s −1 Δ H c 536.4 kJ/mol E 253,900 − 107.8 T (MPa) K = K sat (current study only) 886.1 − 0.376 T...