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Mixed-mode fracture

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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 major...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.power.c9001515
EISBN: 978-1-62708-229-7
... to full-power operation and ensured a low probability of a similar occurrence for all CANDU reactors. Fracture mechanics Laminations Nuclear reactor components Pressure tubes Zr-2.5Nb UNS R60901 Hydrogen damage and embrittlement Mixed-mode fracture Metalworking-related failures...
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
... 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 is shown...
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
... further 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...
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
... G11440 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...
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
... 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 used...
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
... 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 of the...
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
... 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 Selected References • Becker W.T. and...
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
... 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. The...
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
... 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 origin. The...
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
... 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 References 1. Irwin G.R. , “Materials for...
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
...) 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 in the forging press...
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
...-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 in the bore of...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001731
EISBN: 978-1-62708-217-4
... UNS G43400 Hydrogen damage and embrittlement Stress-corrosion cracking Mixed-mode fracture Quenched and tempered steels heat treated to ultimate tensile strengths above 260,000 psi have been used in a number of applications in the aircraft and missile field. The success of these ultrahigh...
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
... 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 to typical...
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
..., the material being drawn out to a feather edge at the time of rupture. Other ruptures in the same and other tubes were of a more brittle type, this being associated with penetration of material by molten copper derived from scale. Boiler tubes Copper Scale (corrosion) Steel tube Mixed-mode...
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
... problems. The temperature in much of the piston was high enough to cause softening by overaging, lowering strength. Automotive engines Overheating Pistons Softening 357 UNS A03570 Thermal fatigue fracture Mixed-mode fracture High-temperature corrosion and oxidation The sustained high...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001707
EISBN: 978-1-62708-217-4
... cleavage like features. The cracking was followed by fatigue in one case and catastrophic failure in the other. Hydrogen embrittlement was identified as the most likely mechanism of failure. Aircraft components Cylinders Ejector pistons Landing gear PH 13-8Mo UNS S13800 Mixed-mode fracture...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.marine.c9001591
EISBN: 978-1-62708-227-3
... Passenger ships Ship plate Steel making Carbon steel Mixed-mode fracture One evening in early 1907, Lord William James Pirrie, managing director and controlling chairman, Harland and Wolff, Shipbuilders, Belfast, Northern Ireland, entertained at dinner J. Bruce Ismay, chairman, Oceanic Steam...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.marine.c9001720
EISBN: 978-1-62708-227-3
... available. These samples will be important to confirm findings to this time and determine the remaining thickness of the hull plate and, indirectly, the integrity of the fuel oil tanks. Fuel tanks Hulls (structures) Metallography Plate metal Warships Carbon steel plate Mixed-mode fracture...