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cyclic fatigue

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Series: ASM Handbook
Volume: 22A
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.hb.v22a.a0005405
EISBN: 978-1-62708-196-2
... this article. The advent of microstructure-sensitive micromechanics modeling of cyclic plastic deformation and fatigue processes in the last decade that employ emerging tools in computational materials science and mechanics has opened new horizons for fatigue modeling. Specifically...
Series: ASM Handbook
Volume: 22A
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.hb.v22a.a0005411
EISBN: 978-1-62708-196-2
... NUMEROUS APPLICATIONS in the modern engineering world that involve the use of metals under conditions of cyclic loading in operating conditions that can cause creep and/or environmental interactions with time-independent, mechanical fatigue processes. The interrelationships between the various damage...
Series: ASM Handbook
Volume: 22A
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.hb.v22a.a0005419
EISBN: 978-1-62708-196-2
... widespread implementation, especially in the aerospace community where failure of a structural component is often catastrophic. Typically, structures are designed for the cyclic loading that they will see in service, and this constitutes the safe life fatigue design philosophy. This assumes that all...
Series: ASM Handbook
Volume: 23
Publisher: ASM International
Published: 01 June 2012
DOI: 10.31399/asm.hb.v23.a0005654
EISBN: 978-1-62708-198-6
... phenomena are discussed in this section. Fatigue failures have been studied by materials scientists for many decades. In a macroscopic sense, even a normally ductile material fails in a manner that is basically brittle under the action of fatigue loading. Fatigue failures involve repeated dynamic cyclic...
Series: ASM Handbook
Volume: 23
Publisher: ASM International
Published: 01 June 2012
DOI: 10.31399/asm.hb.v23.a0005653
EISBN: 978-1-62708-198-6
... Abstract This article reviews the corrosion interactions between biomedical alloys, in particular iron-base, titanium-base, and cobalt-base alloys, in complex geometries and in applications where there are significant cyclic stresses and potential for wear and fretting motion. It discusses the...
Series: ASM Handbook
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0000610
EISBN: 978-1-62708-181-8
... type 316L sliding lag screw in compression hip screw (see Fig. 670 ). Failure occurred in forward notch of last of six thread roots. First five threads were embedded in the femoral head. Last root was in line with or close to the femoral neck fracture, where it would have been subjected to cyclic...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003225
EISBN: 978-1-62708-199-3
... present on the fracture surface, pointing toward the origin of the crack, especially in brittle fractures in flat, platelike components. Fatigue fractures result from cyclic loading, and appear brittle and generally smooth on a macroscopic scale. They are characterized by incremental propagation of...
Series: ASM Handbook
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0000605
EISBN: 978-1-62708-181-8
... (2.5 in.); wall thickness, 3 mm (0.12 in.). Boiler operating pressure, 1.4 kPa (200 psi). Cyclic stresses at the tube bend were produced by thermal expansion and contraction of the entire tube. Mechanical vibration also may have played a role in crack initiation. Corrosion products formed within cracks...
Series: ASM Handbook
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0000621
EISBN: 978-1-62708-181-8
... excessively high cyclic stresses. Source of the high stress was traced to an error in the computer-aided design (CAD) software. Fig. 996 : Fracture surface with drain hole at bottom center. Note beach marks. “O” and corresponding arrows indicate fatigue origins. 2.5×. The as-received cylinder head is shown...
Book Chapter

Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003241
EISBN: 978-1-62708-199-3
... Abstract This article reviews the various types of mechanical testing methods, including hardness testing; tension testing; compression testing; dynamic fracture testing; fracture toughness testing; fatigue life testing; fatigue crack growth testing; and creep, stress-rupture, and stress...
Series: ASM Handbook
Volume: 23
Publisher: ASM International
Published: 01 June 2012
DOI: 10.31399/asm.hb.v23.a0005658
EISBN: 978-1-62708-198-6
... °F) and the other with M s = 70 °C (160 °F), representing typical stress-controlled fatigue. The reported stress is the total cyclic stress (σ max − σ min ), or two times the amplitude. Tests were fully reversed, with R = a; min /σ max = −1. Data from Ref 21 Fig. 16 Four fully...
Series: ASM Handbook
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0001831
EISBN: 978-1-62708-181-8
... crack front and an elastic shock wave in the material ( Ref 9 ). Fig. 15 Wallner lines (arrow) on the surface of a fractured WC-Co specimen. TEM formvar replica. Etched with 5% HCl. (S.B. Luyckx, University of the Witwatersrand) A fracture that is the result of repetitive or cyclic...
Series: ASM Handbook
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0000631
EISBN: 978-1-62708-181-8
..., NASA Marshall Space Flight Center) Fatigue failure of L-shaped electronic flat pack leads due to cyclic, eccentric loading during ultrasonic cleaning. The 0.13-mm (5-mil) thick Alloy 42 (42Ni-58Fe) leads were nickel electroplated, soldered (Cu-Ag alloy) to tungsten, and then gold plated. Fig. 1330...
Series: ASM Handbook
Volume: 23
Publisher: ASM International
Published: 01 June 2012
DOI: 10.31399/asm.hb.v23.a0005657
EISBN: 978-1-62708-198-6
... to which the device was subjected. Fatigue is the accumulation of repeated loading-induced damage that results in the initiation and propagation of cracks. Cyclic loading at levels below the yield strength of a metal can and does result in fatigue failures. Fatigue failures appear brittle...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003224
EISBN: 978-1-62708-199-3
.... Fatigue can be considered to involve the following steps: Cyclic deformation that causes internal damage in the form of dislocation debris Formation of a crack after sufficient damage has been caused by the cyclic loading Propagation of the crack to a size where it becomes unstable for the...
Series: ASM Handbook
Volume: 4E
Publisher: ASM International
Published: 01 June 2016
DOI: 10.31399/asm.hb.v04e.a0006269
EISBN: 978-1-62708-169-6
... Fig. 16 Hardness profiles in WT3-1 α + β (Ti-6Al-2Cr-Mo-Fe) titanium alloy after various isothermal and cyclic nitriding. Source: Ref 31 This section discusses the wear and fatigue properties and corrosion resistance of nitrided titanium alloys, the interaction with hydrogen, and the effect...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003227
EISBN: 978-1-62708-199-3
... by repetitive cyclic loading. The cracks may start at any one of several surface or subsurface discontinuities. Usually, the repetitive nature of the load cycles is reflected in a stepwise growth of the fatigue crack, producing the parallel microscopic marks known as fatigue striations. These can be...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005342
EISBN: 978-1-62708-187-0
... arrest lines. Beach marks are visually evident on most fatigue fractures in cast components and are shown in Fig. 11 . The visual, thumbnail, or curved lines that radiate from the origin region are caused by variations in the cyclic stresses and the crack propagation rate. These marks are not always...
Series: ASM Handbook
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0001834
EISBN: 978-1-62708-181-8
... illustrations. The article also describes microscopic and macroscopic features of the different fracture mechanisms with illustrations with emphasis on visual and light microscopy examination. The types of fractures considered include ductile fractures, tensile-test fractures, brittle fractures, fatigue...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003226
EISBN: 978-1-62708-199-3
...° to the tensile axis. (b) Fracture surface of a 4340 steel tensile specimen showing fibrous zone (A), radial zone (B), and shear lip (C). 3× The formation of cracks under conditions of repeated or cyclic stress has been denoted as fatigue cracking. Zones of crack propagation on fatigue...