1-20 of 73 Search Results for

bolt 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
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001845
EISBN: 978-1-62708-241-9
.... The investigation results suggest that the root cause of failure was a forging lap that occurred during manufacturing. Precracks induced by the forging defect and the influence of preload stress (due to bolt torque) caused the premature failure. cable clamps brittle fracture forging overlap copper alloy...
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
...Abstract Abstract Two titanium alloy wing attachment bolts from a commercial jetliner failed during the course of a routine service operation. Failure of the bolts occurred during the re-torque process as the wing was being reattached. Metallurgical failure analysis indicated that the fracture...
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
... cracking. Metallographic methods were used to diagnose and provide solutions for the service failure. Included are photos showing crack propagation morphology and fracture surface appearance. Bolts Torque Valves ASTM A574 UNS K03104 Stress-corrosion cracking The study and understanding...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c0048626
EISBN: 978-1-62708-225-9
...Abstract Abstract Cadmium-plated high-strength steel bolts were used to facilitate quick disassembly of a vehicle. One bolt was found fractured across the root of a thread after being torqued in place for one week. The bolts were made of 8735 steel heat treated to a tensile strength of 1241...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.steel.c9001668
EISBN: 978-1-62708-232-7
... the lower vessel and maintaining a seal. After the failure occurred, it was discovered that the bolts were being incorrectly torqued to 69 Nm rather than to 40 Nm. The explosion occurred three hours after furnace startup. The same bolts had been used previously in one other similar test that ran one week...
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
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
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c0048630
EISBN: 978-1-62708-217-4
... assembly to finger-tightness, and the consequent wrench torquing caused the actual fractures. The very small radius of the fillet between the bolt head and the shank undoubtedly accentuated the embrittling effect of the hydrogen. To prevent reoccurrence, the cleaning and cadmium-plating procedures were...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001381
EISBN: 978-1-62708-215-0
...Abstract Abstract A helicopter main rotor bolt failed in the black-coated region between the threads and the taper section of the shank during assembly. The torque applied was approximately 100 N·m (900 in.·lbf) when the bolt sheared. No other bolts were reported to have failed. The failed bolt...
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
... steel would serve as a replacement material. Based on test results, the solution to the hydrogen-stress cracking problem consisted of changing the bolt from type 410 to 305 stainless steel, eliminating use of MoS2, and limiting the torque to 60 N·m (540 in.·lb). Bolts, Materials substitution...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001742
EISBN: 978-1-62708-217-4
.... The assigned main causes were design deficiency, improper maintenance during overhaul, and abnormal service operation. The problem can be solved by proper overhauling that ensures bolted assemblies are tightened evenly and accurately, in accordance with recommended torque values. Also, the manufacturer made...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001760
EISBN: 978-1-62708-241-9
... be prevented by eliminating the bolt hole, using a different type of bolt, or adjusting the fastening torque. cylinder head overload failure overtorquing cast aluminum alloy casting pores metallurgical analysis thermomechanical fatigue strength EN 46200 (aluminum alloy AlSi8Cu3) Introduction...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001903
EISBN: 978-1-62708-217-4
... features typical of low stress intensity fatigue of aluminum alloys. The fatigue resulted from abnormal fretting owing to inadequate torquing of the main retention bolts. Aircraft maintenance engineers and owners were advised to adhere to specifications when torquing this joint. Aircraft components...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001095
EISBN: 978-1-62708-214-3
... was probably the result of insufficient torque on the bolts. Bending fatigue ASTM A574 UNS K03104 Fatigue fracture Background Visual Examination of General Physical Features Testing Procedure and Results Discussion Conclusion and Recommendations Acknowledgments Selected Reference...
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
... torque value depends directly on the friction between the contacting threads. The use of an effective lubricant on the threads may result in overloading of the fastener, whereas the use of a less effective lubricant may result in a loose joint. With proper selection of materials, proper design of bolt...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001377
EISBN: 978-1-62708-215-0
... torque values. The bolts were either dipped in a test fluid before tightening or subjected to a test atmosphere, introduced through the small hole in the bearing cap. Solutions that could come into contact with the bolts prior to or during the normal engine assembly procedure were tested. These fluids...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003516
EISBN: 978-1-62708-180-1
... or standard deviation. Source: Ref 13 Stress levels for the different loading conditions experienced by a torque link bolt (example 1) Table 2 Stress levels for the different loading conditions experienced by a torque link bolt (example 1) Loading condition Stress levels, ksi Mean stress...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001306
EISBN: 978-1-62708-215-0
... multiple origins around the circumference. There was no indication that any microstructural characteristics of the material contributed to the failure. Inclusions that were present were small and relatively few in number. Failure to check the torque of the inner wheel nuts as per the manufacturer's...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001587
EISBN: 978-1-62708-217-4
... of the jackscrew assembly, including the jackscrew with an internal torque tube, the gimbal nut, and the upper and lower mechanical stops. The jackscrew was connected to the horizontal stabilizer and controlled its movement. Multiple damage features, indicative of contact with another object, were observed...