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torsional fracture

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Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c0091096
EISBN: 978-1-62708-234-1
... the conclusion that the basic failure mechanism was fracture by torsional fatigue, which started at numerous surface shear cracks, both longitudinal and transverse, that developed in the periphery of the root of the shear groove. These shear cracks resulted from high peak loads caused by chatter. The shear...
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Published: 01 December 2019
Fig. 3 SEM image of torsional fracture that shows rub features near the outer diameter dimples near the center of the wire More
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Published: 01 December 2019
Fig. 4 SEM image of torsional fracture surface that shows tracking of inclusions More
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Published: 01 January 2002
Fig. 56 Elliptical dimples (a) on the fracture surface of ductile torsion fracture of cast steels Source: Ref 42 . (b) Mode II dimples on wrought 6061-T6 aluminum tensile specimen. Courtesy of P. Werner, University of Tennessee More
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Published: 15 January 2021
Fig. 56 Elliptical dimples (a) on the fracture surface of ductile torsion fracture of cast steels. Source: Ref 43 . (b) Mode II dimples on wrought 6061-T6 aluminum alloy tensile specimen. Courtesy of P. Werner, University of Tennessee More
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Published: 01 January 2002
Fig. 52 Torsion fracture in an aluminum-silicon alloy (alloy 319-T5). Classic brittle torsion fracture on a plane at 45° to the axis of the cylinder. Hardness, 38 HRB; tensile strength, 179 MPa (26 ksi); total elongation, 0.5%. Source: Ref 42 More
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Published: 01 January 2002
Fig. 53 Macroscale brittle torsion fracture in an aluminum-silicon alloy (alloy A356 sand casting). Hardness, 38 HRB; tensile strength, 214 MPa (31 ksi); total elongation, 4%. Source: Ref 42 More
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Published: 01 December 2019
Fig. 15 SEM image of kinking failure in NiTi wire that shows both torsional fracture surface features and compressive damage on the wire outer surface More
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Published: 15 January 2021
Fig. 52 Torsion fracture in an aluminum-silicon alloy (alloy 319-T5). Classic brittle torsion fracture on a plane at 45° to the axis of the cylinder. Hardness, 38 HRB; tensile strength, 179 MPa (26 ksi); total elongation, 0.5%. Source: Ref 43 More
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Published: 15 January 2021
Fig. 53 Macroscale brittle torsion fracture in an aluminum-silicon alloy (alloy A356 sand casting). Hardness, 38 HRB; tensile strength, 214 MPa (31 ksi); total elongation, 4%. Source: Ref 43 More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.usage.c9001230
EISBN: 978-1-62708-236-5
... of which propagated at an angle of approximately 45 deg to the longitudinal axis, and therefore were caused by torsion stresses. Neither macroscopic nor microscopic examination determined any material or processing faults. Experience has shown that torsion vibration fractures of this kind usually appear...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.mech.c9001220
EISBN: 978-1-62708-225-9
... Abstract A helical compression spring with ten turns made of 1.8 mm thick wire which was under high pressure during tension applied to a rocker arm broke on the test stand in the third turn. The fracture was a torsion fracture that initiated in the highly loaded inner fiber and showed in its...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c0048117
EISBN: 978-1-62708-235-8
... of inclusions. Torsional fracture was indicated by the presence of beach marks at a 45 deg angle to the wire axis. It was established that the spring fractured by fatigue nucleated at the subsurface defect. Nonmetallic inclusions Shrinkage pipe Valve springs 6150 (Chromium-vanadium alloy steel UNS...
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Published: 01 June 2019
Fig. 5 a). View of fracture surface. Torsional vibration, fracture of a valve spring, origin of fracture marked by arrow. 10× b). Side view. Torsional vibration, fracture of a valve spring, origin of fracture marked by arrow. 10× More
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Published: 01 January 2002
Fig. 19 Surface of a torsional-fatigue fracture in an induction-hardened 1041 (1541) steel shaft. The shaft fractured after 450 hours of endurance testing. 1 1 4 × More
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Published: 01 January 2002
Fig. 31 Fracture surfaces of a torsional fatigue-test specimen. Courtesy of Greg Fett, Dana Corporation More
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Published: 01 January 2002
Fig. 37 Fracture surface of a hardened steel valve spring that failed in torsional fatigue. Arrow indicates fracture origin at a subsurface nonmetallic inclusion. More
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Published: 01 June 2019
Fig. 3 The fracture surface of the original crack displays evidence of torsional failure, followed by partial welding by friction. Apparently, the second crack then developed by fatigue. More
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Published: 01 June 2019
Fig. 10 Fatigue fracture and torsional overloading of a single filament from a steel drive cable failure. Magnification 360 times. More
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Published: 15 January 2021
Fig. 28 Surface of a torsional fatigue fracture in an induction-hardened 1041 (1541) steel shaft, which fractured after 450 h of endurance testing More