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low-cycle fatigue

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Series: ASM Handbook
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0000614
EISBN: 978-1-62708-181-8
... Abstract This article is an atlas of fractographs that helps in understanding the causes and mechanisms of fracture of maraging steels and in identifying and interpreting the morphology of fracture surfaces. The fractographs illustrate the tensile-test fracture, low-cycle fatigue fracture...
Series: ASM Handbook
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0000625
EISBN: 978-1-62708-181-8
... the ductile fracture, interlaminar failure, transgranular cleavage and fracture, tension-overload fracture, longitudinal and transverse cracking, fiber splitting, stress rupture, and low-cycle fatigue of these composites. ductile to brittle transition fractograph metal-matrix composites...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006776
EISBN: 978-1-62708-295-2
... engineering components or structures are or can be subjected to cyclic loads during their lifetime. Fatigue may be categorized as low-cycle fatigue or high-cycle fatigue. Low-cycle fatigue occurs after a relatively low number of cycles, whereas high-cycle fatigue occurs after a relatively high number of...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006781
EISBN: 978-1-62708-295-2
.../reverse thrust/ground idle excursions as (varying) elevated-temperature low-cycle fatigue events. One may then view the cruise portion of the flight as elevated-temperature high-cycle fatigue events (fatigue creep). Each of these excursions is affected in some way by the ambient temperature (time of day...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006779
EISBN: 978-1-62708-295-2
... design concepts Design philosophy Design concept Material characteristics Safe-life, infinite-life Nominal stress or local stress concept S - N curve, S a = f ( N F ) Fatigue diagram, S a = f ( S m ) Safe-life, finite-life Local strain concept Low-cycle fatigue curve...
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
... (HCF) or plastic strain-based criteria for low-cycle fatigue (LCF) have been applied based on transfer of results from tests on relatively small-scale unnotched laboratory specimens to structural components ( Ref 1 ) to estimate crack initiation life. Similarly, test results for crack propagation in...
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
..., thermomechanical fatigue; NDE, nondestructive evaluation; LCF, low-cycle fatigue; HCF, high-cycle fatigue. Source: Ref 2 In the past, some limited elevated-temperature hold-time studies have been performed in vacuum to investigate the relative contribution of the environment and creep deformation to the...
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
... loading of an engineering component. In the low-cycle fatigue (LCF) regime, the durability of a smooth material subjected to cyclic mechanical loading can be expressed in terms of the Coffin-Manson equation ( Ref 49 ): (Eq 8) Δ ε p = ε f ′ ( N f ) − c where Δε p is the...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006792
EISBN: 978-1-62708-295-2
... review of the microstructural changes in contact fatigue of steel is available in the literature ( Ref 94 ). Fig. 11 Micrograph white etching bands in bearing steel. LABs, low-angle bands; HABs, high-angle bands. Source: Ref 33 Fig. 12 Micrograph showing a butterfly on a plane...
Series: ASM Handbook
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0000613
EISBN: 978-1-62708-181-8
... Abstract This article is an atlas of fractographs that helps in understanding the causes and mechanisms of fracture of tool steels and in identifying and interpreting the morphology of fracture surfaces. The fractographs illustrate the low-cycle and high-cycle fatigue fractures, tension...
Series: ASM Handbook
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0000612
EISBN: 978-1-62708-181-8
... fracture, low-cycle and high-cycle fatigue fracture, fracture surface, brittle intergranular fracture, hydrogen embrittlement, and intergranular stress-corrosion cracking of stainless steel components of these steels. The components include high-pressure compressor parts, springs, deflector yokes of...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006780
EISBN: 978-1-62708-295-2
... Abstract The principal types of elevated-temperature mechanical failure are creep and stress rupture, stress relaxation, low- and high-cycle fatigue, thermal fatigue, tension overload, and combinations of these, as modified by environment. This article briefly reviews the applied aspects of...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005261
EISBN: 978-1-62708-187-0
... Abstract This article provides an overview of conventional low-pressure casting and describes types of furnaces, tooling, and cores. It discusses the casting cycle steps, advantages, mechanical properties, and considerations of counterpressure casting. The article describes the vacuum riserless...
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
... developed due to low-cycle bending fatigue patient mobility. SEM, 235× (R.J. Gray, Consultant) Failure of AISI type 316L Jewett nail (hip implant) due to improper installation. Fig. 680 : Fractured implant after removal from body. The threaded tip of an impactor-extractor tool is inserted by the...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003225
EISBN: 978-1-62708-199-3
... proper strength, surface finish, assembly, and operation Prior damage by mechanical or corrosion modes could have initiated cracking Alignment, vibration, balance High cycle, low stress: large fatigue zone; low cycle, high stress: small fatigue zone Attack morphology and alloy type must...
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
...-contaminated region it followed the scale network, delineating prior-austenite grain boundaries. Under repeated impacts, the fracture advanced further by low-cycle fatigue until part failure occurred by cleavage. Fig. 146 : “Rock candy” portion of fracture surface where fracture followed scale network...
Series: ASM Handbook
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0000607
EISBN: 978-1-62708-181-8
...×. Fig. 280 : Same as Fig. 279 , but at higher magnification. SEM, 100× (J.H. Maker, Associated Spring, Barnes Group Inc.) Low-cycle fatigue fracture of AISI 1074 strip. Failure initiated at defects that were probably formed during hot rolling of the band. Binocular examination of defects revealed...
Series: ASM Handbook
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0000608
EISBN: 978-1-62708-181-8
... Services Ltd.) Fig. 356 Tire tracks on fatigue fracture surface of AISI 4140 quenched and tempered at 700 °C (1290 °F). This feature is unique to fatigue fractures and is frequently observed in cases where crack propagation rate was high and few or no striations formed (as in low-cycle fatigue...
Series: ASM Handbook
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0000616
EISBN: 978-1-62708-181-8
.... TEM thin foil, 11,400× (J.K. Tien and L. Fritzmeir, Columbia University) Effect of thermal cycling on fatigue fracture of single-crystal PWA 1480 with NiCoCrAlY applied by the low-pressure plasma spray process. Fig. 857 : Fracture surface of coated sample tested at 1050 °C (1920 °F) in isothermal...
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
... fourfold enlargement makes visible the fine dimples surrounding the particle sites. Note that the surfaces of the secondary grain-boundary cracks are remarkably smooth. SEM, 4000× Fig. 1021 Cone-shaped fracture surface produced by low-cycle fatigue in aluminum alloy 7075-T6 (same mechanical...