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transit fatigue

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Image
Published: 01 March 2006
Fig. 3.24 Correlation of transition fatigue life N T with a modified form of the proposal by Landgraf ( Ref 3.25 ) for the materials listed in Table 3.1 More
Image
Published: 01 September 2008
Fig. 1 Fatigue source located in the transition zone between case and core More
Image
Published: 01 October 2011
Fig. 16.23 Transition from stage I to stage II fatigue with change in direction of fracture path More
Image
Published: 01 November 2012
Fig. 29 Transition from stage I to stage II fatigue. (a) Highly enlarged schematic cross-sectional sketch. The edge of the metal is at left. When tensile forces repeatedly act on the surface, the microstructural changes of stage I cause a submicroscopic crack to form. With each repetitive More
Image
Published: 01 August 2005
Fig. 3.18 Transition from stage I to stage II fatigue. (a) Change in fracture path from stage I (top of photo) to stage II (bottom). (b) Transition from stage I to stage II of a fatigue fracture in a coarse-grain specimen of aluminum alloy 2024-T3. Source: Ref 3.13 More
Image
Published: 01 August 2005
Fig. 4.10 Fatigue crack surface in a sheet (or plate), showing the transition from a tensile mode to a shear mode More
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2006
DOI: 10.31399/asm.tb.fdsm.t69870045
EISBN: 978-1-62708-344-7
... relation for transition life vs. Brinell hardness for steels. Source: Ref 3.25 Fig. 3.24 Correlation of transition fatigue life N T with a modified form of the proposal by Landgraf ( Ref 3.25 ) for the materials listed in Table 3.1 Fig. 3.25 Use of the cyclic stress-strain curve...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270165
EISBN: 978-1-62708-301-0
... Abstract Two filtration components installed on a developmental aircraft cracked during pressure impulse testing. Both parts were made from an aluminum alloy, solutionized and aged, and cracked due to fatigue. In both cases, the crack initiated at a transition region on an inner surface...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270118
EISBN: 978-1-62708-301-0
... Abstract A first-stage compressor blade failed prematurely in an aircraft engine, fracturing at the midpoint of the root transition region. An examination of the fracture surface revealed beach marks, striations, and pitting, indicating that the blade failed by fatigue due to a crack initiated...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1995
DOI: 10.31399/asm.tb.sch6.t68200083
EISBN: 978-1-62708-354-6
... that designers may gain by designing components as castings to achieve low stress concentrations economically. brittle fracture corrosion design considerations ductile to brittle transition fatigue resistance high cycle fatigue low cycle fatigue steel castings stress concentration factors...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2006
DOI: 10.31399/asm.tb.fdsm.t69870179
EISBN: 978-1-62708-344-7
... range of methods. It also explains how small nuances in loading can introduce tensile or compressive stress in the hysteresis loops causing variations in fatigue life as large as 50:1 depending on where the transition in fatigue behavior occurs. References References 8.1 Young W.C...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270128
EISBN: 978-1-62708-301-0
... Abstract This chapter discusses the failure of a first-stage compressor blade in an aircraft engine and explains how investigators determined that it was caused by fatigue, with a crack originating from corrosion pits that developed in the root transition region on the convex side...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2006
DOI: 10.31399/asm.tb.fdsm.t69870123
EISBN: 978-1-62708-344-7
... different mission lives would result, depending on how the transition from the large to the small strain cycles occurs. Knowing the details of the cyclic stress-strain response following each transition is thus very important in assessing the cumulative fatigue damage done under nonuniform loading histories...
Image
Published: 01 October 2005
Fig. CH31.3 (a) SEM fractograph showing low-cycle fatigue striations in zone 2. (b) SEM fractograph showing the transition from fatigue to intercrystalline fracture. Arrows indicate the transition. More
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2005
DOI: 10.31399/asm.tb.faesmch.t51270138
EISBN: 978-1-62708-301-0
... (a) SEM fractograph showing low-cycle fatigue striations in zone 2. (b) SEM fractograph showing the transition from fatigue to intercrystalline fracture. Arrows indicate the transition. Fig. CH31.4 SEM fractograph of region 3 showing intercrystalline mode of fracture Discussion...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 July 2009
DOI: 10.31399/asm.tb.bcp.t52230209
EISBN: 978-1-62708-298-3
... Abstract This chapter describes the effect of processing variables on the mechanical properties of beryllium, including tensile and yield strength, fracture toughness, creep and fatigue strength, ductile-to-brittle transition, and notch sensitivity. It also discusses the effects of chemical...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780314
EISBN: 978-1-62708-281-5
... Abstract This article describes the mechanisms of moisture-induced damage in polymeric materials, covering the characteristics of important structural plastics; the effects of moisture on glass transition temperature, modulus, creep, and stress relaxation of plastic materials; and moisture...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610147
EISBN: 978-1-62708-303-4
... a sustained-load creep test rather than a fatigue test. For carbon and low-alloy steels, S - N curves typically have a fairly straight slanting portion at low cycles, changing into a straight horizontal line at higher cycles, with a sharp transition between the two. Fig. 5 Influence of stress ratio...
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
..., 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 test...
Image
Published: 01 September 2008
Fig. 27 Surface fracture spring. The dotted arrow shows the fatigue crack nucleus, and the dashed arrow shows the fatigue-to-brittle fracture transition. The solid arrow shows the surface analyzed by scanning electron microscopy. Original magnification: 6├Ś More