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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.c9001094
EISBN: 978-1-62708-214-3
...Abstract Abstract Cadmium-coated type 410 martensitic stainless steel 1 4 -14 self-drilling tapping screws fractured during retorquing tests within a few weeks after installation. The screws were used to assemble structural steel frames for granite panels that formed the outer skin...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001103
EISBN: 978-1-62708-214-3
...Abstract Abstract An aluminum bronze propeller tap bolt from a twin-screw vessel fractured just below the bolt head. Liquid penetrant testing revealed a large network of cracks that extended radially from sites in and just below the bolthead. Metallographic analysis indicated that the tap bolt...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c0048620
EISBN: 978-1-62708-225-9
...Abstract Abstract Two nuts were used to secure the water-supply pipes to the threaded connections on hot-water and cold-water taps. The nut used on the cold-water tap fractured about one week after installation. Examination of the fracture surfaces of the coldwater nut did not reveal any...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0006409
EISBN: 978-1-62708-217-4
... threads showed an incomplete thread form resulting from improper tapping. It was concluded that the pitostatic system connectors failed by SCC. The stress was caused by forcing the improperly threaded female nut over its fully threaded male counterpart to effect a seal. The one connector tested...
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
...-porosity defect was observed adjoining a tapped hole. A second, much larger cavity was also detected. Investigation (visual inspection and 7500x SEM fractographs) supported the conclusions that failure occurred through a zone of structural weakness that was caused by internal casting defects and a tapped...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.auto.c9001556
EISBN: 978-1-62708-218-1
...Abstract Abstract A few Cr-Mo steel piston rods from different production batches were found identically cracked in the eye end near the radius after chrome plating and baking treatment. Two of them cracked in the plating stage itself instantly broke on slight tapping. Cracking initiated from...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.usage.c9001427
EISBN: 978-1-62708-236-5
... approximately in line with the crankpin center line. The fracture was of the fatigue type, slowly developing cracks having started from opposite sides of each tapped hole and crept across the section. Microstructure of the crankshaft indicated the material was a plain carbon steel, the carbon content being...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001699
EISBN: 978-1-62708-234-1
... the Cooling Tower and a tap fixture. Table 1 Water Quality Test Results from the Cooling Tower and a tap fixture. Parameter Cooling Tower Sample Sample from Tap @ Column B15/E4 Bicarbonate (ppm) 166 127 Carbonate (ppm) <20 <20 Alkalinity as CaCO 3 166 127 (ppm...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.matlhand.c9001428
EISBN: 978-1-62708-224-2
... in. below the collar and the remaining threads ground off to allow it to enter the 5 8 in. tapping hole drilled into the extension collar. The two components were then welded together by a single circumferential run of weld metal; the residual depth of weld metal after dressing ranged from 1...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0001812
EISBN: 978-1-62708-180-1
... A threaded fastener may be either a male or a female threaded cylinder—both of which are necessary as a two-element device for applying force, primarily to clamp two members together. Bolts, screws, and studs are male threaded cylinders; nuts or tapped holes are female threaded cylinders. For this discussion...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001358
EISBN: 978-1-62708-215-0
... leak out after only a few minutes. All areas displaying cracks were documented. Ring Testing Ring testing was also conducted on the diaphragms, not only to determine the condition of the vane-to-shroud welds, but also to help locate cracks in the vanes themselves. Each vane was lightly tapped...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001098
EISBN: 978-1-62708-214-3
... and the tapped hole. Typically, lubricated threads require a smaller preload. A very effective lubricant may result in overloading of the screws, while a less effective lubricant may result in a loose joint, if the same preload is used. The original equipment manufacturer of the forced draft fan hydraulic...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.bldgs.c9001653
EISBN: 978-1-62708-219-8
... in tap water was measured for both components. The gate was found to be −0.038V while the spindle was more anodic, i.e., more likely to corrode, at −0.075V. The potential between the spindle and the gate at 3-cm spacing was found to be 0.0522V with the spindle being anodic. From this we concluded...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0091644
EISBN: 978-1-62708-217-4
... the presence of elements typically found in tap water. Chemical analysis of the bolt material showed the composition to be within specification limits for PH13-8Mo stainless steel. Rockwell C hardness measurements taken on the bolt produced values ranging from 47 to 48 HRC, which would correspond...
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
...) Analysis by Bethlehem-Lukens Plate Division The open hearth furnace was tapped into a ladle after the steel was melted and refined. The low silicon and high oxygen content indicates that there may have been only limited deoxidation as the tapping occurred. The steel was teemed into ingot molds...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.chem.c0089633
EISBN: 978-1-62708-220-4
... The vertical portion of the crack passed through a tapped 8 mm (0.3 in.) diameter lubrication-fitting hole that was centered on the parting line of the casting ( Fig. 1a .) The direction of the crack changed abruptly to nearly horizontal at an internal shoulder approximately 100 mm (4 in.) below...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c0047745
EISBN: 978-1-62708-235-8
... in storage, the assembly had withstood a 1035-kPa (150-psi) pressure test using tap water. All surfaces were to have been passivated according to MIL-S-5002 before assembly, but no other cleaning techniques were stipulated. Investigation Conclusions Recommendations The failed braze had joined...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.usage.c9001415
EISBN: 978-1-62708-236-5
... and extended parallel to the plane of the web across practically the whole of the section before complete rupture occurred. Fig. 1 The sprayed metal on the fractured pin was found to have very poor adhesion and could easily be detached by tapping a chisel inserted between it and the pin. Portions...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c9001492
EISBN: 978-1-62708-235-8
... and forth bending of the lead, exposing the copper to oxidize, causing lead separation. During electrical testing of a hybrid package it was found that the output signals changed when the package was gently tapped. The lid was cut from three sides and opened, and spalled plating was found causing...
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
...-fatigue arises from the simultaneous action of corrosion and fluctuations of tensile stress. The corrodent need only be very mild—ordinary tap water will suffice—and the fluctuations in tensile stress need not be of a very high order; it is the simultaneous action of corrosion and fluctuating stress...