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creep deformation

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.fdmht.t52060001
EISBN: 978-1-62708-343-0
...Abstract Abstract This chapter familiarizes readers with the mechanisms involved in creep and how they are related to fatigue behavior. It explains that what we observe as creep deformation is the gradual displacement of atoms in the direction of an applied stress aided by diffusion...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610415
EISBN: 978-1-62708-303-4
... stand used for creep and stress-rupture testing. Source: Ref 2 Fig. 2 Stages of creep deformation. (a) Strain curve for the three stages of creep under constant-load testing (curve A) and constant-stress testing (curve B). (b) Relationship of strain rate, or creep rate, and time during...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2011
DOI: 10.31399/asm.tb.mnm2.t53060049
EISBN: 978-1-62708-261-7
... introduces the concepts of mechanical properties and the various underlying metallurgical mechanisms that can be used to alter the strength of materials. The mechanical properties discussed include elasticity, plasticity, creep deformation, fatigue, toughness, and hardness. The strengthening mechanisms...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.mmfi.t69540281
EISBN: 978-1-62708-309-6
.... Elastic-plastic or fully plastic analysis such as the J -integral approach is used when large-scale yielding occurs. For crack growth at high temperature, under constant load, the material near the crack tip may undergo viscoelastic deformation, or creep. The crack-tip stress field, which takes the basic...
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
.... It explains how to deal with time dependent deformation in design, how to estimate cumulative damage under changing conditions, and how to assess the effect of multiaxial stress based on uniaxial test data. It also includes information on rupture ductility, creep fracture, and creep-crack growth...
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
... strength is usually the limiting design factor. However, at high temperatures, permanent deformation can occur over a period of time at stresses well below the yield strength. This time-dependent deformation is known as creep and occurs at temperatures greater than approximately 0.3 to 0.5 of the absolute...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2011
DOI: 10.31399/asm.tb.mnm2.t53060385
EISBN: 978-1-62708-261-7
... Faces of Wear 16.2 Temperature-Induced Failures 16.3 Brittle versus Ductile Failure 16.4 Fatigue Intergranular Fracture Transgranular Fracture Fracture of Components Preventive Measures Thermally Induced Fatigue Creep Deformation and Stress Rupture Oxidation Failure...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780185
EISBN: 978-1-62708-281-5
... in plastics Creep curves generally exhibit three distinct phases. First-stage creep deformation is characterized by a rapid deformation rate that decreases slowly to a constant value. The four-parameter model was proposed to describe long-term creep. In this model, the first-stage creep deformation...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2007
DOI: 10.31399/asm.tb.htcma.t52080379
EISBN: 978-1-62708-304-1
... under no external strain (or stress) at 600 °C (1110 °F) for 2000 h in CO-32H 2 -4CO 2 -0.2H 2 S, showing uniform corrosion with no preferential corrosion penetration. Source: Ref 7 Fig. 14.14 Fe-12Cr-3Al-3Ti showing preferential corrosion penetration for the specimen under creep deformation...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1995
DOI: 10.31399/asm.tb.sch6.t68200083
EISBN: 978-1-62708-354-6
.... Castings can be efficiently designed for the proper section stiffness and resistance to buckling. At high temperatures, time-dependent deformation can occur at stresses below the short-time tensile yield strength. This creep deformation may cause failure by excessive deformation. Stress rupture or time...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.mmfi.t69540047
EISBN: 978-1-62708-309-6
...Abstract Abstract This chapter examines the phenomena of deformation and fracture in metals, providing readers with an understanding of why it occurs and how it can be prevented. It begins with a detailed review of tension and compression stress-strain curves, explaining how they are produced...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.sap.t53000001
EISBN: 978-1-62708-313-3
... stresses that make creep resistance a key consideration in materials selection. One of the most common phenomena observed is the “bowing” of the airfoil due to creep deformation. Typical alloys selected for the vane assembly are Waspaloy, X-40, alloy 713, MAR-M 302, B-1900, and columnar-grained MAR-M 200...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.fdmht.t52060111
EISBN: 978-1-62708-343-0
... in the vicinity of R is such that the plastic flow developed on compression is equal to the tensile plastic flow plus the tensile creep flow during PQ . Thus, from the earlier considerations, the Δε CP deformation is equal to the tensile creep deformation 0.000975, and the remainder of the inelastic...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2005
DOI: 10.31399/asm.tb.mmfi.9781627083096
EISBN: 978-1-62708-309-6
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.tb.ems.t53730023
EISBN: 978-1-62708-283-9
..., elasticity, plastic deformation, ductility, hardness, creep, fatigue, and fracture. It also describes the primary components of a Charpy impact tester and the role they serve. creep ductility elasticity fatigue fracture failure hardness impact test plastic deformation strain stress tension...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.stg2.t61280339
EISBN: 978-1-62708-267-9
... of the lattice parameters and elastic moduli, and the sign (tension or compression), various rodlike or platelike γ′ morphologies can develop during creep deformation. Most SCDS cast alloys have an <001> orientation. The result of this orientation is that γ′ plates (rafts) form perpendicular to a tensile...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2011
DOI: 10.31399/asm.tb.jub.t53290137
EISBN: 978-1-62708-306-5
... of the material, then work hardening is no longer a consideration. With time at temperature, creep mechanisms now control the rate of asperity deformation, and the area of contact or bond continues to grow. As the area of contract grows, the stress acting on the surface asperities decreases. Consequently, creep...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1989
DOI: 10.31399/asm.tb.dmlahtc.t60490183
EISBN: 978-1-62708-340-9
... Boiler-tube failures can result from high-temperature creep of the superheater and reheater tube steel. Metal degradation and permanent deformation will occur with time depending on the actual temperature and stress levels. If temperatures and stresses exceed designselection values, the tube steel...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.fibtca.t52430325
EISBN: 978-1-62708-253-2
... and there was no deformation in the contours. The rupture surface looked brittle in nature. Bulging was noticed at the rupture location. The inner surface of the tube was smooth with a thin adherent magnetite scale that was grayish black in color. Creep-fatigue interaction is a complex process of damage involving creep...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.fdmht.t52060043
EISBN: 978-1-62708-343-0
... is allowed to occur along EAB . The cycle BCDE is then repeated until cyclic failure occurs. In this idealized loop, the tensile inelastic strain is creep ( EAB ), while the compressive inelasticity is plasticity ( BCD ). Simple Conceptual Deformation Models If creep deformation is represented...