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Mixed-mode fracture

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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.c9001753
EISBN: 978-1-62708-241-9
... as the presence of deleterious intermetallic compounds within interdendritic regions. Macrohardness testing produced hardness values which are noticeably higher than standard hardness values for 712.0. The primary fracture surfaces indicate evidence of mixed-mode fracture, via intergranular cracking, cleaved...
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
.... It describes the general aspects of fracture modes and mechanisms. The article briefly reviews some mechanistic aspects of ductile and brittle crack propagation, including discussion on mixed-mode cracking. Factors associated with overload failures are discussed, and, where appropriate, preventive steps...
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
...Abstract Abstract Overload failures refer to the ductile or brittle fracture of a material when stresses exceed the load-bearing capacity of a material. This article reviews some mechanistic aspects of ductile and brittle crack propagation, including a discussion on mixed-mode cracking, which...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.bldgs.c0090943
EISBN: 978-1-62708-219-8
... review of the potential root cause. Weld repairs Worm gears Manganese bronze Mixed-mode fracture A very large diameter worm gear that had been in service in a dam for more than 60 years exhibited cracks and was removed. It was reported that the cast bronze gear was only rarely stressed...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001035
EISBN: 978-1-62708-214-3
... micrograph of flat fracture characterstics in the area shown in Fig. 5 , composed of cleavage with river patterns. 4000×. Surprisingly, when the rough central area of the axle fracture was examined, a mixed mode of fracture—both brittle cleavage facets and ductile dimple rupture—was found ( Fig. 7...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.matlhand.c0089338
EISBN: 978-1-62708-224-2
... Mixed-mode fracture A steel lifting eye that had fractured during service is shown in Fig. 1 . No additional service-related information was provided. The eye was reportedly manufactured from a grade 1144 steel and should exhibit a minimum tensile strength of 689 MPa (100 ksi). Fig. 1 Steel...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0006406
EISBN: 978-1-62708-217-4
... of corrosion products was seen on the fractured surface. Metallographic examination of the flange in the area of fracture initiation showed the presence of end grain exposure, which would promote SCC. Electron optical examination of the fracture clearly showed the flange was cracking by a mixed mode of stress...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.usage.c0090988
EISBN: 978-1-62708-236-5
..., and perhaps heat treatment, that may have contributed to this failure. Bursting strength Cylinder pipe Decarburization 1045 UNS G10450 Mixed-mode fracture A jack cylinder split open during simulated service testing ( Fig. 1a ). The intended internal test pressurization was reportedly analogous...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c0089663
EISBN: 978-1-62708-229-7
... Crack propagation Precipitates Steam turbines ASTM A356 grade 6 UNS J12073 Casting-related failures Mixed-mode fracture When a crack developed in a cast steel steam-turbine casing, a small section of the casing was removed by torch cutting to examine the crack completely and to determine its...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.auto.c9001173
EISBN: 978-1-62708-218-1
... EN 353 Hydrogen damage and embrittlement Mixed-mode fracture For many years ball joints used in heavy vehicle steering joints had given satisfactory service. Suddenly, some failed a few hours after being fitted but before the vehicle had gone into service. Failure occurred in the necked part...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c0049797
EISBN: 978-1-62708-235-8
... rod was thus attributed to the presence of the quench crack flaw caused by an improper machining sequence and heat treatment practice. Connecting rods Quench cracking Threads 4340 UNS G43400 Mixed-mode fracture An AISI 4340 threaded steel connecting rod was part of a connecting linkage...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.rail.c9001585
EISBN: 978-1-62708-231-0
... fracture with short-term exposure to an oxygen-rich environment. Fracture features emanated from longitudinally-aligned inclusions rich in aluminum. Inclusions Rails (railroad) Carbon-manganese steel Mixed-mode fracture The National Transportation Safety Board simultaneously investigates...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001289
EISBN: 978-1-62708-215-0
... was made. Subsurface cracks were found to be zigzag and discontinuous as well as intergranular in nature. A mixed mode of fracture involving ductile and brittle flat facets was observed. Micropores and rod-shaped manganese sulfide inclusions were also noted. The material had a hydrogen content of 22 ppm...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.marine.c9001523
EISBN: 978-1-62708-227-3
... to round the comers of the flame-cut cloverleaf lobe. This new manufacturing process solved the problem. Decks Ductile brittle transition Residual stress Transport ships ABS AH36 Mixed-mode fracture Metalworking-related failures Introduction Crack Initiation Failure Mechanism...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.marine.c9001140
EISBN: 978-1-62708-227-3
... be determined employing the “leak-before-break” design philosophy, developed using fracture mechanics, to eliminate the possibility of catastrophic ruptures. Gas cylinders Sea water Al-5Mg Mixed-mode fracture Stress-corrosion cracking Introduction Failure Analysis Characterization of Cracking...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001479
EISBN: 978-1-62708-229-7
...-mode fracture Liquid metal induced embrittlement Several ruptures took place in the front wall tubes of a water tube boiler and samples taken from typical major and minor ruptures were received for examination, together with a sample cut from a sound tube for purposes of comparison...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001421
EISBN: 978-1-62708-235-8
... Joining-related failures Mixed-mode fracture Corrosion fatigue The part concerned was the bottom flange of a vertical pipe coupled to an isolating valve in a steam supply line to a turbine, the steam pressure being 1,500 lb. per sq. in. and the temperature 780° F. Multiple cracking occurred...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c0089254
EISBN: 978-1-62708-225-9
... of low-alloy steel was suggested as recommendation. Design Locking devices Materials selection 1144 UNS G11440 Mixed-mode fracture ( Ref 1 ). A design deficiency involving improper materials selection was revealed through the analysis of a failed tapered-ring sprocket locking device...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001252
EISBN: 978-1-62708-235-8
... (fracturing) Forgings Ingots Precipitates Fe-0.39C-1.38Mn-0.325Mo Mixed-mode fracture An octagonal steel ingot weighing 13 tons made of manganese-molybdenum steel containing 0.39% C, 0.41% Si, 1.38% M n, 0.014% P, 0.009% S and 0.325% Mo, developed gaping cross-cracks on all eight sides...
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
... at the intrados of the hook would deform in a ductile manner both under slow and impact-loading conditions if in the form of an unnotched test piece, but if notched, it failed in a brittle manner under impact, though not under slow loading. Cranes Impact Fe-0.25C Mixed-mode fracture The hook...