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tear ridges

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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
... to separate in two. The exterior surfaces were slightly oxidized ( 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...
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 Hypotheses about Potential Metallurgical Root Causes...
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
... 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 strips ( Fig. 8 ). Fig. 8 Scanning electron micrograph of main crack...
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
... at arrow X ( Fig. 5 ), showing a fatigue thumb nail 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...
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
.... Longitudinal section. Microstructure consists 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...
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
... and extensive yellowish brown products at these initiation sites were evidence of the simultaneous action of the environment and the rotary bending stresses. However, the striations, tire tracks, or plateaus separated by tear ridges, which would indicate corrosion fatigue, could not be seen because...
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
... 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 observed farther away from the fracture...
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
... dislocation-emission (AIDE)/microvoid-coalescence (MVC) process, as proposed by the present author [ 5 , 17 ]. In most cases, 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...
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
... (zone A) was a band of long fibrils 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...
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
... at the microscale, 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...
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
... visible at the macroscale. Fractures that are initially ductile then transition to brittle (case 4) are usually associated with rising-load ductile tearing, or the initial ductility may be inferred by transverse strain at the crack tip. The size of the plastic zone may be microscale in this case. Mixed...
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
... quasi cleavage fracture and dimple rupture were observed to increase significantly out 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...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006778
EISBN: 978-1-62708-295-2
... with packet size, not prior-austenite grain size. The term quasi-cleavage is historically applied when significant dimple rupture and/or tear ridges accompany the cleavage morphology. Grains oriented favorably with respect to the axis of loading can slip and exhibit ductile behavior, whereas those...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001819
EISBN: 978-1-62708-180-1
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...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003524
EISBN: 978-1-62708-180-1
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006795
EISBN: 978-1-62708-295-2
... of surface irregularities depends on elastomer properties. At low angles of impact, ridges or waves accompanied by subsurface tears may be formed on the surface of rubbers with high rebound resilience ( Ref 86 , 87 ). The maximum erosion rate of elastomers is usually observed at angles lower than 20° ( Fig...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003560
EISBN: 978-1-62708-180-1
... impingement angles (10 to 30°), elastomers cut and tear more readily, leading to increases in wear rates. Hard, brittle materials usually perform better under these conditions. For materials intermediate in their mechanical properties, for example, some metals, the effect of impingement angle depends...
Book Chapter

Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006790
EISBN: 978-1-62708-295-2
... of grooves that do not involve direct material removal. The displaced material forms ridges adjacent to grooves, which may be removed by subsequent passage of abrasive particles. Cutting occurs when material is separated from the surface in the form of primary debris, or microchips, with little...