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crack initiation

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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
... during their lifetime. This article focuses on fractography of fatigue. It provides an abbreviated summary of fatigue processes and mechanisms: fatigue crack initiation, fatigue crack propagation, and final fracture,. Characteristic fatigue fracture features that can be discerned visually or under low...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006775
EISBN: 978-1-62708-295-2
... initiation and propagation), while other methods consider either a submicroscopic or microscopic description of structure to provide criteria to predict crack propagation and fracture based on microscopic processes. For example, dislocation theory has been used to develop models for the formation of crack...
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
... article provides a description of the microstructure-sensitive modeling to model fatigue of several classes of advanced engineering alloys. It describes the various modeling and design processes designed against fatigue crack initiation. The article concludes with a discussion on the challenges in...
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
..., impact fracture, fatigue fracture surface, reversed torsional fatigue fracture, transgranular cleavage fracture, rotating bending fatigue, tension-overload fracture, torsion-overload fracture, slip band crack, crack growth and crack initiation, crack nucleation, microstructure, hydrogen embrittlement...
Series: ASM Handbook
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0000622
EISBN: 978-1-62708-181-8
... corrosion-fatigue crack initiation and propagation of these alloys. aluminum alloys aluminum powder corrosion-fatigue fatigue crack initiation fatigue crack propagation fractograph Fig. 1096 Fracture along prior powder particle boundaries in cold-rolled Al-4.2Mg-2.1Li. The experimental P...
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
... roll was made of ACI CF-8M (∼AISI type 316) and measured 8.8 m (29 ft) long and 1.2 m (49 in.) in diameter with a 65-mm (2.5-in.) wall thickness. Cracking initiated near the outside diameter of the roll, 2.7 m (9 ft) from the driven end, and extended roughly circumferentially 320° around the roll. An...
Series: ASM Handbook
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0000604
EISBN: 978-1-62708-181-8
... sequence, localized plastic deformation, and microcrack initiation and propagation of these irons. crack initiation crack propagation fractography malleable iron microcracking white cast iron Fracture sequence (increasing strain) illustrating localized plastic deformation and microcrack...
Series: ASM Handbook
Volume: 22A
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.hb.v22a.a0005458
EISBN: 978-1-62708-196-2
... wetting and essentially defect-free interfaces, whereas different sites may contain unsealed nanovoids that can grow in size. Based on the experimental observations, initial void growth thus appears to occur along particle-matrix interfaces in a manner similar to crack propagation, with only slight...
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
..., fibrous fracture, crack-initiation zone, microvoid coalescence, fatigue-crack surface, hydrogen embrittlement, and fatigue striations of these steels. fatigue fracture fractograph maraging steel shrinkage cavities tensile-test fracture Fig. 798 Surface of a fracture in a tensile-test...
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
... Abstract Fatigue failures may occur in components subjected to fluctuating (time-dependent) loading as a result of progressive localized permanent damage described by the stages of crack initiation, cyclic crack propagation, and subsequent final fracture after a given number of load...
Series: ASM Handbook
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0000601
EISBN: 978-1-62708-181-8
... fracture; cleavage fracture; notch-impact fracture; oxide inclusions and blowholes; ductile rupture; impact fracture and tensile-test fracture surfaces; fatigue striations; and crack initiation and propagation of pure irons. cleavage fracture ductile fracture fractograph grain boundaries impact...
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
... loading is known as a fatigue fracture. A fatigue fracture generally occurs in three stages: it initiates during Stage I, propagates for most of its length during Stage II, and proceeds to catastrophic fracture during Stage III. Fatigue crack initiation and growth during Stage I occurs principally by...
Series: ASM Handbook
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0000603
EISBN: 978-1-62708-181-8
...; and microcrack initiation and propagation. brittle fracture cleavage fracture fatigue cracks fatigue fracture ferritic ductile iron fractographs microcracking pearlitic ductile iron Brittle cleavage fracture of ductile iron spur gear (ASTM A536, grade 100-70-03) due to improper heat...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006785