1-20 of 88 Search Results for

thermal fatigue striations

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
Image
Published: 01 December 1992
Fig. 10 Scanning electron micrograph showing ductile transgranular thermal fatigue striations on initiation zone. More
Image
Published: 01 December 2019
Fig. 11 Detailed view of the fracture surface on the inner region of the boiler tube, showing thermal fatigue striations More
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001791
EISBN: 978-1-62708-241-9
... of the fracture surface on the inner region of the boiler tube, showing thermal fatigue striations Abstract A pipe in the lateral wall of a boiler powering an aircraft carrier flat-top boat failed during a test at sea. The pipe was made from ASTM 192 steel, an adequate material for the application...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001056
EISBN: 978-1-62708-214-3
... an important role in the propagation of cracks in the failed pipes. Fig. 10 Scanning electron micrograph showing ductile transgranular thermal fatigue striations on initiation zone. Discussion A very rough surface finish clearly had a deleterious effect on material fatigue strength in terms...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001110
EISBN: 978-1-62708-214-3
... surface were examined. Both fractographic and metallographic features revealed that the failure was by thermal fatigue caused by the presence of biaxial thermal stresses on the inner surface of the tube. It was recommended that the steam and air be thoroughly mixed prior to entering the tube to decrease...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001346
EISBN: 978-1-62708-215-0
... Abstract Alloy UNS N08800 (Alloy 800) tubes of the steam superheating coils of two hydrocracker charge heaters in a refinery failed prematurely in service. Failure analysis of the tubes indicated that the failures could be attributed to thermal fatigue as a result of temperature fluctuations...
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
... of fatigue in metals. The dictionary defines striations as a series of parallel grooves or lines. In this article, the narrower, commonly used definition of fatigue striation is used: a striation is a microscopic groove or furrow that delineates a local fatigue crack front after a single cycle of loading...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001709
EISBN: 978-1-62708-229-7
... by thermal fatigue. In order to help in identification of the failure mechanism, mature crack surface has been examined using scanning electron microscope. The most noticeable feature of this crack surface is the existence of plateaus or patches of fatigue striations separated by tear ridges or shear...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003539
EISBN: 978-1-62708-180-1
... to light microscopes, markedly increasing the useful magnification range. Compared to transmission electron microscopes, SEM permits examination of relatively large samples and produces images with a 3D character. Striations Striations are a classic microscopic feature of fatigue in metals...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001558
EISBN: 978-1-62708-217-4
... mm (Fig. 4); F1, the following band of fatigue, which is 0.165 mm across, with striations of 1–4 µm spacing (Fig. 5); C2, the second cleavage band which is 0.533 mm across (Fig. 6); and F2, the final fatigue band which is .152 µm across, with striations of 5–10 µm spacing (Fig. 7). These four zones...
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
... the characteristics of fatigue fractures followed by a discussion on the effects of loading and stress distribution, and material condition on the microstructure of the material. In addition, general prevention and characteristics of corrosion fatigue, contact fatigue, and thermal fatigue are also presented...
Book Chapter

Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003544
EISBN: 978-1-62708-180-1
...-life criterion gas porosity heat treatment inclusions infinite-life criterion internal bursts macropitting micropitting reversed bending rolling-contact fatigue rotational bending strengthening stress distribution subcase fatigue thermal fatigue torsional loading FATIGUE damage...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001849
EISBN: 978-1-62708-241-9
... or heat checks (known also as thermal cracks or firecracks) Fig. 5 Scanning electron micrographs showing ( a ) an overview of the fracture surface depicting the boundary between fatigue and overload zone (sample 1), ( b ) a detail of the fatigue area; note the smeared areas and poorly visible...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001129
EISBN: 978-1-62708-214-3
... , 6 , 7 ). Fig. 5 Coarse fatigue striations on area B.∼1.8×. Fig. 6 SEM micrograph of area B, illustrating fatigue striations shown in Fig. 5 . 40×. Fig. 7 SEM micrograph of ductile tearing in area A. 335×. Metallography Microstructural Analysis Cross sections...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.marine.c9001657
EISBN: 978-1-62708-227-3
... was damaged, examination in the SEM revealed several areas of well-defined fatigue striations and microscopic crack growth bands, Figure 4 . A specific fatigue crack nucleation site could not be readily identified, but the orientation of the crack growth bands and striations in area A, Figure 3 , suggested...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.auto.c9001543
EISBN: 978-1-62708-218-1
..., at 15,000×, characteristic striations, indicating that the crack was caused by fatigue. Since the crack was due to mechanical fatigue, no doubt aggravated by thermal fatigue, the piston would have failed catastrophically in service. Fig. 4 Striations on the fracture face of the undercrown crack...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006774
EISBN: 978-1-62708-295-2
... at the microscale, interpretations of larger fracture patterns can be completed even when microscopic evidence is obliterated. One example is fatigue crack propagation analysis where striations (microscopic signatures of crack propagation) may have been damaged due to postfracture exposure. In such a case...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003537
EISBN: 978-1-62708-180-1
... montonic versus fatigue fracture and ductile versus brittle fractures (on either a macroscale or microscale): Monotonic versus fatigue fracture: Beach marks and striations indicate fatigue, but their absence does not confirm fracture from monotonic loads. Fracture surfaces from fatigue do...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006769
EISBN: 978-1-62708-295-2
... surface exists, depth of field may be the most important parameter. In this case, depth of field may be enhanced by having a long working distance, low magnification, and a small objective aperture. If one desires to image very fine features, such as fatigue striations, and high resolution is required...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001799
EISBN: 978-1-62708-241-9
... such as striations were not found. To resolve the discrepancy, investigators created and tested uniaxial fatigue samples, and the microfeatures were nearly identical to those found on the failed shaft. The root cause of failure was determined to be fatigue, and it was concluded that cracks on the pinion shaft...