1-20 of 135 Search Results for

fatigue crack nucleation

Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
Close Modal
Sort by
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
... candy fracture, cleavage fracture, brittle fracture, high-cycle fatigue fracture, fatigue striations, hydrogen-embrittlement failure, creep crack propagation, fatigue crack nucleation, intergranular creep fracture, torsional overload fracture, stress-corrosion cracking, and grain-boundary damage of...
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
... monitoring via an inspection scheme. This article begins with a discussion on the stages of the fatigue damage process. It describes hierarchical multistage fatigue modeling and several key points regarding the physics of crack nucleation and microstructurally small crack propagation in the HCF regime. The...
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
... be defined and limited. The conventional design methods are supplemented by the fracture mechanics methods, in which cracklike flaws in the structure are anticipated and included in the design. These methods have all contributed to a better understanding of fatigue crack nucleation in regions of high...
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
... kinetics, evolution of crack-tip stress fields due to creep, oxygen ingress, and change in the microstructure. It also provides a summary of creep-fatigue modeling approaches. creep oxidation kinetics oxygen ingress microstructure creep-fatigue modeling crack-tip stress field THERE ARE...
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
... Abstract This article describes some of the mechanical/ electrochemical phenomena related to the in vivo degradation of metals used for biomedical applications. It discusses the properties and failure of these materials as they relate to stress-corrosion cracking (SCC) and corrosion fatigue (CF...
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
... slip bands intersect free surfaces (e.g., see Fig. 2 in “ Fatigue Failure in Metals ” in Fatigue and Fracture , Volume 19 of the ASM Handbook , 1996). Continued surface roughening and damage accumulation ultimately results in crack nucleation at the surface. Cyclic damage can also accumulate at...
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: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006792
EISBN: 978-1-62708-295-2
... this failure mode is understood to be subsurface stress concentrations (e.g., nonmetallic inclusions). The increased stress near these stress concentrations leads to the nucleation of fatigue cracks, which are then able to propagate during subsequent cycles. Historically, this was the cause of the vast...
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
... Abstract This article focuses on characterizing the fracture-surface appearance at the microscale and contains some discussion on both crack nucleation and propagation mechanisms that cause the fracture appearance. It begins with a discussion on microscale models and mechanisms for deformation...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005220
EISBN: 978-1-62708-187-0
... show that the fatigue properties of Al-7Si-0.4Mg alloy were controlled by its bifilm content. In fact, in 98% of all fatigue fractures closely observed by SEM in this work, bifilms were the initiators of cracks. The remaining 2% exhibited up to 100 times greater fatigue lives. These were originally...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001286
EISBN: 978-1-62708-170-2
... buckling or cracking can be time-dependent and can also depend on the moisture available in the ambient environment. This time/environment-related failure is called static fatigue ( Ref 66 ). Fractures and fracture patterns in films can be detected by the use of fluorescent tracers. Generally, residual...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005301
EISBN: 978-1-62708-187-0
... modification changes porosity formation in a casting. It describes the mechanisms responsible for silicon modification, as well as the modifications and changes in eutectic nucleation and eutectic grain structure. The article reviews the usage of strontium during process steps in foundry practices. The growth...
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
... also discussed. The article describes the fracture characteristics of stress rupture. Information on various metallurgical instabilities is also provided. The article presents a description of thermal-fatigue cracks, as distinguished from creep-rupture cracks. creep-rupture cracks creep...
Series: ASM Handbook
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0000609
EISBN: 978-1-62708-181-8
... fracture, fracture by overpressurization, inclusion effect, fatigue crack propagation, ductile fatigue striation, secondary cracking, intergranular fracture, and elevated-temperature fracture of alloy steels used in pressure vessels, steam boiler superheater tubes, and box-girder bridges. alloy steel...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006777
EISBN: 978-1-62708-295-2
... (depending on temperature and the cyclic waveform and frequency). On the microscopic level, crack nucleation in persistent slip bands and transgranular cracking during fatigue seem to be the rule, especially in smooth-section components (the zone of persistent slip bands is unlikely to be visible in...
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
... before final fast fracture occurred. See also Fig. 307 . Actual size Fig. 307 Polished and etched section through the spring in Fig. 306 , taken adjacent to the fracture. Visible is a cracklike defect that probably nucleated the fatigue crack. Decarburization (white zone) around the defect...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003225
EISBN: 978-1-62708-199-3
... component subjected to cyclic stresses of sufficient magnitude. The crack propagates under the applied stress through the material until complete fracture results. On the microscopic scale, the most important feature of the fatigue process is nucleation of one or more cracks under the influence of reversed...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003227
EISBN: 978-1-62708-199-3
... fracture of metals, including laps, seams, cold shuts, cracks, inclusions, porosity, fatigue, and stress corrosion cracking. failure analysis fractography macroscopic examination microscopic examination stress corrosion cracking surface defects visual examination EXAMINATION of a...
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
... ductile iron compact tension specimen. Note how crack ignores nodules in fatigue and grows almost exclusively through nodule-nucleated voids during ductile fracture. ∼80× (W.L. Bradley, Texas A&M University) Ductile fracture in ferritic ductile iron. Fig. 94 : SEM, 160×. Fig. 95 : Example of...
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...