1-20 of 71 Search Results for

installation torque

Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
Close Modal
Sort by
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.usage.c0090929
EISBN: 978-1-62708-236-5
...Abstract Abstract Size M5 x 0.8 mm, class 8.8 metric screws were failing during application, reportedly at the normal installation torque. Investigation (visual inspection, metallographic analysis, and unetched 8.9x fractographs) supported the conclusion that the fasteners failed via ductile...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.usage.c9001728
EISBN: 978-1-62708-236-5
.... It was concluded that failure was due to improper installation torqueing of the bolts. Aircraft components Aircraft Bolts Propellers Torque Steel Fretting wear Fatigue fracture Careful examination of flight log data, maintenance reports, accident reports, and statements of witnesses indicated...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001766
EISBN: 978-1-62708-241-9
... to an auger type drilling process. It should be noted that, per the anchor manufacturer’s information regarding installation, up to 6,000 ft-lbf of installation torque is acceptable. Fig. 1 As-received photograph of the failed anchor and an exemplar anchor Fracture of the anchor occurred...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001649
EISBN: 978-1-62708-234-1
... between friction, installation torque, and bolt tension, because current technologies and procedures may not be compatible with aging fasteners. Ideally, torque-tension relationships should be developed for each and every combination of fastener, washer, and structural material to ensure the design...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001379
EISBN: 978-1-62708-215-0
...Abstract Abstract The heads of two AISI 8740 steel bolts severed while being installed into an Army tank recoil mechanism. Both broke into two pieces at the head-to-shank radius and the required torque value had not been attained nor exceeded prior to the failure. A total of 69 bolts from...
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
...Abstract Abstract Two clamps that support overhead power lines in an electrified rail system fractured within six months of being installed. The clamps are made of CuNiSi alloy, a type of precipitation-strengthening nickel-silicon bronze. To identify the root cause of failure, the rail operator...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c0006899
EISBN: 978-1-62708-225-9
... Lubricants Sulfurization 410 UNS S41000 Hydrogen damage and embrittlement Type 410 stainless steel bolts were used to hold together galvanized gray cast iron splice case halves. Before installation, the bolts were treated with molybdenum disulfide (MoS 2 ) antiseize compound. The torque applied...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0048630
EISBN: 978-1-62708-217-4
... to minimize hydrogen embrittlement. The bolts broke at the junction of the head and shank. The nuts were, theoretically, installed fingertight. The failure was attributed to hydrogen embrittlement that had not been satisfactorily alleviated by subsequent baking. The presence of burrs on the threads prevented...
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
...Abstract Abstract Pitostatic system connectors were being found cracked on several aircraft. Two of the cracked connectors made of 2024-T351 aluminum alloy were submitted for failure analysis. The connectors had cut pipelike threads that were sealed with Teflon-type tape when installed...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001789
EISBN: 978-1-62708-241-9
... growth rate is two to three times higher in Ni-Al bronze. Based on the results of this work, the likelihood of subcritical cracking under various conditions can be reasonably estimated, which, in the case at hand, proved to be quite high. union nut corrosion ammonia installation torque bronze...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006805
EISBN: 978-1-62708-329-4
... were required to be free of burrs. A 10-day sustained-load test was specified for a sample quantity of bolts from each lot. To simulate installation conditions, fasteners from several lots were torqued to 80% of rated ultimate tensile strength into a predrilled aluminum alloy plate. This high...
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
.... 3a and b ). Aluminum alloy 7075-T73 nuts were being installed on type 7075-T6 fasteners with an installation torque range of 7.3 to 8.5 N · m (65 to 75 in. · lb). Dimpled fracture features indicated that the head cracks were caused by overload; however, chemical analyses, hardness tests...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c9001721
EISBN: 978-1-62708-225-9
.... The main reason for the failures of the valve bonnet screws in valves installed after 1988 is believed to be due to increased bolt torque requirement. This increased bolt torque produces higher stresses in the bonnet screws thus increasing their susceptibility to SCC. Even though the bolts were higher...
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
... the corrosion resistance of the screws. The screws were subjected to retorquing tests within 2 weeks after installation. Several screws fractured in a brittle manner, substantially below the rated torque loading. The newly developed cadmium-coated type 410 martensitic stainless steel screws were...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006837
EISBN: 978-1-62708-329-4
... information to the bearing installer as to whether the bearing is new or reconditioned, including the month and year of installation. In this case, it was found that the bearing had been installed in new condition in December 1990 by Trinity 54 in Dallas, Texas. These notations are shown in Fig. 31...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.usage.c9001660
EISBN: 978-1-62708-236-5
... of fastener is designed so that during installation, the nuts (collars) separate in half (torque off) leaving a portion of the collar tight against the bolt (pin) at a specified torque ( Figures 1 ). Pins from three different commercial sources were evaluated in the present investigation and are referred...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c0048634
EISBN: 978-1-62708-225-9
... conditions, fasteners from several lots were torqued to 80% of rated ultimate tensile strength into a predrilled aluminum alloy plate. This high torque (greater than normal installation) was used to speed the failure rate of the fasteners. After 335 h, a head was lifted with fingernail pressure from...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.marine.c9001703
EISBN: 978-1-62708-227-3
... well in excess of that specified was used when installing the nuts. What was assumed to be the corresponding washer from the unbroken stud was not damaged in this fashion. When an attemp was made to apply the specified torque against an undamaged washer, the stud threads gave at a value below...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.design.c9001578
EISBN: 978-1-62708-233-4
... shaft to transmit the strain information to an antenna and subsequently to an FM receiver-demodulator. The experimental setup was calibrated by putting one end of the drive shaft in a vice and applying 100 lbf torque to the other end. While the 100 lbf torque was applied, the output of the demodulator...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001099
EISBN: 978-1-62708-214-3
... greater than 690 MPa (100 ksi) simply due to torquing the screws to the recommended 32.5 N . m (24 lbf . ft). Concentrated stresses at the junction of the head and shank, the site of all the fractures, would be much higher. From the hardness readings ( Table 1 ), the cap screws were estimated to have...