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overtorquing

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.marine.c9001617
EISBN: 978-1-62708-227-3
... in one type of coupling, undue stress concentrations at some of the crack-initiation sites, and overtorquing of some couplings during installation. Recommendations on ways to prevent further failures based on these causes are discussed. Progression markings Residual stress 41255B Cu-9Al-4Fe-4Ni...
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
... that overtorque was the sole precipitating cause of the anchor fracture was the observation of differing degrees of permanent twist evident on the extension rods associated with the failed anchor and a nearby un-failed anchor. The extension rods comprise the upper section of the screw anchor, effectively...
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
... because it lacks the passivation which gives stainless steel its corrosion resistance. It has been demonstrated that rapid rusting is easily produced in seawater, and that pitting occurs in highly stressed locations. The stress intensification at the root of the overtorqued threads, together...
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
... and Fatigue Research-Structural Issues and Relevance to Naval Aviation,” Int. J. Fatigue , 2001 , 23 , pp. S1 – 10 . 10.1016/S0142-1123(01)00115-3 3. Baggerly R.G. : “Evaluating the Effects of Overtorque in Bolts,” Practical Failure Analysis , 2001 , 1 ( 1 ), pp. 41 – 6 . 4...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.aero.c9001015
EISBN: 978-1-62708-217-4
... investigator, on the basis of prior examination, came to the conclusion that the clamp did in fact fail prior to the accident due to overtorqueing of the tightening mechanism. Other investigators felt that the conclusion was not necessarily justified. The basic purpose of this examination was to determine...
Series: ASM Failure Analysis Case Histories
Volume: 1
Publisher: ASM International
Published: 01 December 1992
DOI: 10.31399/asm.fach.v01.c9001117
EISBN: 978-1-62708-214-3
... specifications. Experimental Because of the fracture direction, there was speculation that the failure was caused by overstressing in the hoop direction that was due to overtorquing during connection makeup. Additional testing was carried out to determine whether such a failure could occur. Couplings were...
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
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001815
EISBN: 978-1-62708-241-9
... of fracture initiation, and the likelihood of reporting these failures as an unusual brittle character is less than 100%, brittle-mode fractures in coarse-grained material may never have been recorded as such. For instance, some of the reported fractures due to “overtorque” during repairs in the past may have...
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
... ductility failure. 2× Fig. 2 Comparison of overload failures with a typical engine fracture (right). Uniaxial tensile failure on left and an overtorqued failure (combined stress state) at center. Both overload failures exhibit ductility, with plastic deformation Near the fracture regions reflected...
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
..., and microstructural examination showed that the fasteners were within specifications. Unused fasteners and nuts from the same batch were installed in a simulated joint in an effort to duplicate the head cracking. Overtorquing of the fasteners caused nut-thread stripping at torques of 10.2 to 11.3 N · m (90 to 100...
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
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003524
EISBN: 978-1-62708-180-1
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003553
EISBN: 978-1-62708-180-1
... aluminum-zinc alloy connector exposed to a semiindustrial atmosphere caused failure by SCC in less than one month. This connector had been overtorqued during tightening to seal the assembly for a preservice hydrostatic test. In this case, too, substitution of straight-threaded connections reduced...