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tear ridges

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Published: 01 January 2002
Fig. 28 Fatigue-fracture surface of broken commercially pure titanium bone plate with mixed fracture morphology. (a) Fracture surface shows fatigue striations, terraces, and tearing ridges, depending on the local crystallographic orientation. 250×. (b) Higher magnification view of the area More
Image
Published: 01 June 2019
Fig. 8 Scanning electron micrograph of main crack surface (zone 1 in Fig. 3 ) showing patches of fatigue striations separated by shear steps or tear ridges. More
Image
Published: 01 December 1992
Fig. 11 SEM micrographs of the center radial crack fracture surface at arrow H in Fig. 10 , showing tear ridges due to mode III crack propagation. (a) 1300×. (b) 5000×. More
Image
Published: 01 December 2019
Fig. 4 SEM of brittle intergranular fracture surface, exhibiting smooth areas with tear ridges, produced by sub-critical crack growth for a high strength D6aC steel (tempered at 400 °C to 51HRC) in liquid mercury at 20 °C [ 5 ] More
Image
Published: 15 January 2021
Fig. 56 Transgranular cleavage fracture showing hairline indications (fine tear ridges) at A, together with tongues at B, shallow dimples at C, and secondary cracks at D. Fracture shown was produced in a specimen of 4315 steel by stress-corrosion cracking in a 3.5% NaCl solution. Transmission More
Image
Published: 01 December 1993
Fig. 9 (a) Higher magnification of region B in Fig. 7 . Cleavage with some river patterns, tear ridges, and microvoid coalescence visible. Fracture is predominantly cleavage. One region of microvoid coalescence is circled (b) Higher magnification of region F in Fig. 7 .Fracture features More
Image
Published: 01 December 2019
Fig. 32 SEM of fracture surface of notched, fatigue-pre-cracked nickel single crystal cracked first in liquid mercury and then (after completely evaporating the mercury) in hydrogen gas (101 kPa) at 20 °C showing essentially identical appearance (tear ridges, slip lines, and isolated dimples More
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001134
EISBN: 978-1-62708-214-3
... ( Fig. 1 ). All fracture surfaces appeared clean, gray, and normal to the axis. The fracture at the weldjoint appeared more fibrous ( Fig. 2 ) than the other fracture, which displayed tear ridges ( Fig. 3 ). Fig. 1 As-received chain link. 2×. Fig. 2 Fracture surface through weld joint...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001028
EISBN: 978-1-62708-214-3
... followed by ductile tearing produced during crack opening. (a) 41×. (b) Large dimple containing a TiCN inclusion. 1449×. Fig. 11 SEM micrographs of the center radial crack fracture surface at arrow H in Fig. 10 , showing tear ridges due to mode III crack propagation. (a) 1300×. (b) 5000...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001838
EISBN: 978-1-62708-241-9
.... pipe hot cracking grain boundary segregation stainless steel tear ridges melt bridging microfractography induction heating frequency X6CrNiMoTi17-12-2 (titanium-stabilized austenitic stainless steel) UNS S31635 Introduction Large austenitic stainless steel piping used for manifolds...
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 Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001272
EISBN: 978-1-62708-215-0
... of pearlite and primary ferrite. Note coarse pearlite and divorced cementite. (b) Higher magnification of Fig. 8 . Fig. 9 (a) Higher magnification of region B in Fig. 7 . Cleavage with some river patterns, tear ridges, and microvoid coalescence visible. Fracture is predominantly cleavage. One...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001370
EISBN: 978-1-62708-215-0
.... However, the striations, tire tracks, or plateaus separated by tear ridges, which would indicate corrosion fatigue, could not be seen because of the corrosion of the fracture surface. Evidence at the periphery of the fracture surface, such as ratchet marks, corrugated periphery, and, more importantly...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001084
EISBN: 978-1-62708-214-3
... , indicated by the arrow labeled Y The fracture appears to emanate locally from this defect, as evidenced by the directionality of tear ridges in Fig. 3(a) and (b) as well as by the indication of subtle beach marks ( Fig. 3 b, arrows). Fig. 3(c) shows evidence of fine fatigue striations that were...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001275
EISBN: 978-1-62708-215-0
... and large voids ( Fig. 3 ) which extended from the inside surface of the pipe across approximately one third of its thickness. There was a gradual transition into a second region (zone B) of shorter fibrils and smaller voids with pronounced ridges of long tears interspersed among them ( Fig. 4 ). The ridges...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001812
EISBN: 978-1-62708-241-9
..., fracture surfaces appear flat and largely featureless except for isolated tear ridges in some cases ( Fig. 4 ) and there are no obvious signs of slip around crack tips, consistent with an adsorption-induced decohesion process. However, dimples can be so small and shallow that they are not resolved...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003538
EISBN: 978-1-62708-180-1
..., there is evidence of plastic deformation and failure by microvoid coalescence (MVC) ductile tearing. However, exceptions to this fracture progression mode have been reported. One is formation of a specimen-scale shear band (sometimes associated with void sheet formation at the microscale). One set of circumstances...
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
..., there is evidence of plastic deformation and failure by microvoid coalescence (MVC) ductile tearing. However, exceptions to this fracture progression mode have been reported. One is formation of a specimen-scale shear band (sometimes associated with void sheet formation at the microscale). One set of circumstances...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001762
EISBN: 978-1-62708-241-9
... of this area. Fig. 22 A point type origin can be seen in this fracture. A ridge between the case and core fractures is accentuated by a shadow line Fig. 23 A single point origin is marked by the arrows Extensive secondary cracking was observed on the rough turned OD surface at the crack...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.conag.c9001471
EISBN: 978-1-62708-221-1
... is depicted in Figure 2 ; both showed a bright crystalline appearance together with a system of ridges, which commonly radiate from the point of origin, and examination revealed that the starting point of the fracture was a small preexisting crack located at the right of the illustration. Fig. 2...