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Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001845
EISBN: 978-1-62708-241-9
... oxide flakes plastic blunting fractographic analysis bolt torque CuNiSi (nickel-silicon bronze alloy) UNS C64700 Introduction Experimental Setup Failure Analysis Discussion Conclusions Acknowledgments References References 1. Kusner R.E. , Kuli J.C. Jr et...
Book Chapter

Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c0090947
EISBN: 978-1-62708-225-9
... section through the fracture surface is shown in Fig. 1(b) . A secondary crack has opened substantially and blunted in the ductile core. Plastic distortion of the core grain structure at the crack tip was evident. The seat wall was not through-carburized. The near-surface microstructure was tempered...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.bldgs.c9001135
EISBN: 978-1-62708-219-8
... as much stress as its larger counterpart in a standard ferritepearlite steel. This increases the fatigue crack growth rate. In addition, there was less crack tip blunting occurring with a smaller plastic zone. This includes the opening, advance and blunting of a crack tip in the loading portion...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.pulp.c9001393
EISBN: 978-1-62708-230-3
... was blunt-ended. The two cases not only serve to illustrate the danger of applying fillet welds to seal the lap edges of riveted seams, but point to the inadvisability of employing riveted construction for vessels intended for service under conditions involving frequent pressure and thermal fluctuations...
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
... crack initiation at surface pits from corrosion, cyclic loading in a corrosive environment ( stress-corrosion fatigue ) and elastic buckling. Elastic buckling may cause parts to contact, causing seizure of a rotating system, but it may also lead to plastic buckling and ultimately to fracture...
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 Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003538
EISBN: 978-1-62708-180-1
... concepts. bending brittle fracture compression failure deformation ductile crack nucleation ductile fracture ductility fractography manufacturing imperfections metals microvoid coalescence notched specimen plastic flow root cause failure analysis single-crystal cleavage models specimen...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.bldgs.c9001715
EISBN: 978-1-62708-219-8
... in the fracture toughness specimen plastically deforms prior to crack growth. It is indicative of ductile fracture behavior at a crack tip in steel samples. The flat fracture zone, adjacent to the blunting zone and bounded by the overload region, has a projected area of approximately 5.4 mm 2 . The Helix 10...
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
... ). This stress sometimes causes transverse cracking. Source: Ref 10 Even when there is significant constraint at the notch tip, a small amount of plastic tearing can occur on the plane of maximum normal stress in conjunction with crack tip blunting ( Fig. 16 ) ( Ref 11 ). Then, depending on the degree...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.machtools.c0091853
EISBN: 978-1-62708-223-5
... plastically deform under the compressive force of the quartz. The angle that the cutting edge of the particle makes with the wear surface is often referred to as the rake angle in cutting during machining operations. The plowing mechanism of material removal is illustrated in Fig. 5 . In this case...
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
...   Contaminants  Presence of distinguishing surface features   Shear lips   Beach marks   Chevron markings   Gross plasticity   Large voids or exogenous inclusions   Secondary cracks  Direction of propagation  Fracture origin Detection of surface and subsurface defects  Magnaflux  Dye penetrant  Ultrasonics...
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
... locally around the wear groove, resulting in additional material removal by spalling. Fig. 4 Microscopic mechanisms of material removal between abrasive particles and the surface of materials. Source: Ref 6 The plowing and cutting mechanisms involve predominantly plastic deformation...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001685
EISBN: 978-1-62708-235-8
.... , “Hydrogen Isotope Concentration Enhancements at a Blunt Notch,” Scripta Metallurgica , Vol. 24 , p. 111 , 1990 . 10.1016/0956-716X(90)90576-3 10. Pressouyre G. M. , Fidelle J. P. , and Arnould-Laurent R. , “Trap Theory of Hydrogen Embrittlement: Experimental Investigations...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001605
EISBN: 978-1-62708-217-4
... mechanic concepts. As the crack propagated, striations were created on the fracture surface as a result of service-induced load changes. The size of the striations were measured to estimate crack propagation rate. Remaining lifetime estimates were also made. The dimensions of plastically stretched zones...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006825
EISBN: 978-1-62708-329-4
... of the tube. Original magnification: 12× Fig. 38 Micrograph of longitudinal section showing inner edge of the tube having waviness with a smooth surface and little or no plastic deformation of grains. Original magnification: 200× Fig. 73 (a) Close-up view of a boiler-tube fracture surface...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.marine.c9001141
EISBN: 978-1-62708-227-3
... cracks. Transgranular cracks at the end of the main crack in Fig. 9 are shown at higher magnification in Fig. 10 . These cracks cross both ferrite and pearlite grains and have blunt ends. A few, very small transgranular cracks were also seen in some of the other specimens examined. The crack surfaces...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003543
EISBN: 978-1-62708-180-1
... significant visible macroscopic plastic deformation. Applied stress and energy from an external source is required to propagate the fracture, rather than residual stresses alone. Ductile cracks blunt and stop when the stresses are dynamically reduced and insufficient energy to create further distortion...
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
... in Fig. 7(b) . A secondary crack has opened substantially and blunted in the ductile core. Plastic distortion of the core grain structure at the crack tip was evident. The seat wall was not through-carburized. The near-surface case microstructure was tempered martensite and retained austenite, along...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003542
EISBN: 978-1-62708-180-1
... surface (at the top in Fig. 11 ) and tensile stress on the inside surface (at the bottom in Fig. 11 ). Blunt objects, such as spheres, also can produce contact damage, as shown in Fig. 23 . The elliptical lines on the left side of the photograph are contact cracks on the original surface...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001459
EISBN: 978-1-62708-234-1
... testing of full-size components. The most important characteristic of a fatigue failure, and one that greatly puzzled the early engineers, is that some component, e.g., a bolt or shaft, made from a ductile material such as mild steel, fractures without revealing any indications of prior plastic...