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torsion-rotating bending fatigue test

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Series: ASM Handbook
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0000608
EISBN: 978-1-62708-181-8
... test. Note the two fatigue-crack origins, one at arrows A (top) and the other at arrows B (bottom). The crack that was initiated at the origin at arrows B is the earlier crack, as indicated by the well-rubbed surface near that origin. Both at 3× Fig. 481 Surface of a torsional-fatigue fracture...
Series: ASM Handbook
Volume: 23
Publisher: ASM International
Published: 01 June 2012
DOI: 10.31399/asm.hb.v23.a0005654
EISBN: 978-1-62708-198-6
... prominent. Corrosion fatigue tests can be classified as to whether the main process occurring over the test is crack itiation or propagation. In crack initiation testing, the specimen generally has a smooth surface, and either axial or bending loads are applied. Thus the sample will be subjected to...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006776
EISBN: 978-1-62708-295-2
... Characteristic X-pattern on the surface of a medium-carbon steel crankshaft tested under reversed torsional fatigue. Fatigue initiated on a transverse plane of maximum shear, then propagated on two pair of helical surfaces. Source: Ref 11 Fig. 17 Torsional fatigue failure of boron-containing alloy...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006779
EISBN: 978-1-62708-295-2
... properties (microstructure, mechanical characteristics) Type of test sample (smooth or notched specimen, component, size) Specimen orientation Surface condition Stress concentration Environment (temperature, corrosion) Type of loading (axial, bending, torsion) Test-controlling parameter...
Series: ASM Handbook
Volume: 22A
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.hb.v22a.a0005419
EISBN: 978-1-62708-196-2
... to the growth of a crack in a material. For more depth on this subject, see a fracture mechanics text, for example Ref 5 and 6 , for a more detailed description of Y and the stress-intensity factor. Testing has shown that under controlled constant-amplitude fatigue loading, the crack-growth rate...
Series: ASM Handbook
Volume: 23
Publisher: ASM International
Published: 01 June 2012
DOI: 10.31399/asm.hb.v23.a0005658
EISBN: 978-1-62708-198-6
... 16 were obtained using tension-compression cycling. Such fully reversed testing is instructive but can be difficult to conduct due to compressive buckling, particularly at high strains. Figure 17 shows data collected from rotary bending testing. Rotating-bending is a strain-controlled test...
Book Chapter

Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003241
EISBN: 978-1-62708-199-3
...-relaxation testing. Shear testing, torsion testing, and formability testing are also discussed. The discussion of tension testing includes information about stress-strain curves and the properties described by them. compression testing fatigue testing formability testing fracture testing hardness...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006778
EISBN: 978-1-62708-295-2
... or wedge-shaped cracks at grain triple points • Reaction scales or internal precipitation • Some cold flow in last stages of failure Contributing factors • Load exceeded the strength of the part • Check for proper alloy and processing by hardness check or destructive testing, chemical analysis...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0004017
EISBN: 978-1-62708-185-6
... been simulated effectively in the hot torsion test. For routine evaluation of workability of metallurgical product, the upset test is most generally applicable. Various adaptations of this test are useful for routine screening of metallurgical products. Finite-element modeling (FEM) software has...
Series: ASM Handbook
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0000606
EISBN: 978-1-62708-181-8
.... 196 Surface of a bending-plus-torsional-fatigue fracture in an experimental 89-mm (3 1 2 -in.) diam tractor axle of AISI 1041 steel that had been induction hardened. Fracture occurred after 1212 h on an endurance-test track. Note beach marks fanning out from the fatigue-crack origin...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003057
EISBN: 978-1-62708-200-6
... “correct” property value. It is now becoming recognized that certain tests (e.g., bend bar modulus of rupture tests, which are used to determine strength of ceramic materials) are not adequate for design purposes. In the area of mechanical property testing of ceramic materials, it does not seem possible at...
Series: ASM Handbook
Volume: 14A
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v14a.a0009011
EISBN: 978-1-62708-185-6
..., American Society for Metals, 1984, p 95–133 An essential requirement of a hot torsion test is that the specimen be twisted about its axis with no induced bending. Therefore, the test frame should be of high rigidity and should have a facility for the accurate alignment of the rotating components. The...
Series: ASM Handbook
Volume: 12
Publisher: ASM International
Published: 01 January 1987
DOI: 10.31399/asm.hb.v12.a0001834
EISBN: 978-1-62708-181-8
... backward to find the origin or origins. The appearance of these marks on the fracture face is a function of the type of loading, for example, tension, shear, bending, fatigue, or torsion; the nature of the stress system; its magnitude and orientation; the presence of stress concentrators; environmental...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003104
EISBN: 978-1-62708-199-3
... steels were tested in a crossed-cylinder sliding wear machine. The fixed cylinder was made of tungsten carbide (6% Co), rotating at 40,000 rev/h, with an applied load of 68 kg (15 lb). Sliding distances ranged from 1 × 10 −5 to 5 × 10 −5 in. Bulk hardness values of all four steels were in the narrow...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003225
EISBN: 978-1-62708-199-3
... method, surface finish, heat treatment, assembly technique, and environment on fatigue life. In general, factors that influence fatigue life include: Type of loading (uniaxial, bending, torsional) Shape of loading curve Frequency of load cycling Loading pattern (periodic loading at...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006775
EISBN: 978-1-62708-295-2
... compression, bending, torsion). Finally, the factors influencing the appearance of a fracture surface and various imperfections or stress raisers are described, followed by a root-cause failure analysis case history to illustrate some of these fractography concepts. brittle fracture crack nucleation...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006774
EISBN: 978-1-62708-295-2
... torsion loading Machining marks (normal to axis of component) Not distorted in torsion loading Variable roughness of fracture edge In brittle bending, rough side is tension side Table 3 Microscale fractography features Mark/indication Implication Dimpled fracture surface...
Book Chapter

By Ted Kostilnik
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001235
EISBN: 978-1-62708-170-2
... (x) Rotating bending Highly polished Metal tested Peening conditions Fatigue strength Strength gain by peening, % Ref Shot Intensity As-received Polished Peened Over as- rec'd Over polished Type Size No. 0.025 mm 0.001 in. 7 MPa 1 ksi 7 MPa 1 ksi 7 MPa 1 ksi...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006767
EISBN: 978-1-62708-295-2
... and its components are functions of their position on the cut surface. The possibility that the stresses σ and τ are functions of position on the surface must also be permitted (as in the stress field around a stress concentrator or a stress state in bending or torsion). In addition, if the surface is...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005324
EISBN: 978-1-62708-187-0
..., particularly in bending and torsion tests, by shot peening, surface rolling, and flame and induction hardening. These treatments both increase the strength and induce compressive stresses at the surface but should be evaluated for effect and used under close control. Shot peening and surface rolling will...