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plastic strain

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Published: 01 December 2019
Fig. 5 Stress-plastic strain log scale plot for Ramberg–Osgood parameters More
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Published: 01 December 2019
Fig. 8 Cyclic stress–plastic strain curve More
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Published: 01 January 2002
Fig. 85 Fracture obtained by first plastic straining in torsion and then straining in tension. The fracture appearance becomes more characteristic of the first strain increment as the first strain increment increases in magnitude. Source: Ref 4 More
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.process.c0047144
EISBN: 978-1-62708-235-8
.... The results of the autofrettage process, which creates a state of plastic strain in the material, is an increase in the fatigue life of the component. Analysis (visual inspection, 50x/500x unetched micrographs, and electron microprobe analysis) supports the conclusion that the fracture toughness of the steel...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.steel.c9001452
EISBN: 978-1-62708-232-7
... embrittlement had developed following plastic straining and service at a temperature of 260 deg C (500 deg F) suggested that failure resulted from strain-age embrittlement. Brackets Ovens Rimming steel Brittle fracture A bracket which formed part of the carrier of a chain conveyor system used...
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Published: 01 January 2002
Fig. 1 Typical stress-strain curve for a fiber, a plastic, and an elastomer More
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001840
EISBN: 978-1-62708-241-9
... of the resulting cladding can be improved. Beyond a certain point, however, additional impact energy reduces shear strength significantly, causing the cladding process to fail. The findings reveal the decisive role of plastic strain localization and the associated development of microcracks in cladding failures...
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
.... Metallurgical examination of the crack origin revealed that casting pores played a role in initiating the crack. Stress components, identified by finite element analysis, also played a role, particularly the stresses imposed by the bolt assembly leading to plastic strain. It was concluded that the failure can...
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Published: 30 August 2021
Fig. 20 Example of (a) stable cyclic stress-strain hysteresis loops and (b) hysteresis loop depicted as the sum of elastic and plastic strain components. Adapted from Ref 4 More
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006819
EISBN: 978-1-62708-329-4
... the elastic range of the material and the cycles to failure are relatively high ( Ref 6 ). The stress-life method may not be appropriate for low-cycle applications (generally considered to be less than 10,000 cycles), where the applied loading could result in a significant cyclic plastic strain component...
Series: ASM Failure Analysis Case Histories
Publisher: ASM International
Published: 01 June 2019
DOI: 10.31399/asm.fach.modes.c9001487
EISBN: 978-1-62708-234-1
... A corresponds to a total compressive strain of 0.0011 in/″ of which 0.00078 in/″ is elastic, and 0.00032 in/″ is plastic strain. On cooling during running, contraction occurs along line AA 1 B and, at the original temperature, a tensile stress of 5000 p.s.i. will develop in the restrained portion of the coils...
Series: ASM Failure Analysis Case Histories
Volume: 2
Publisher: ASM International
Published: 01 December 1993
DOI: 10.31399/asm.fach.v02.c9001314
EISBN: 978-1-62708-215-0
... localized scale (see Ref 2 ). This is a second source of cyclic plastic strain. Fig. 15 Maximum allowable stress versus service temperature for ASTM A-106 grade B material. Adapted from Ref 2 . Design operating temperature indicated. Some concern was directed towards the influence...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003546
EISBN: 978-1-62708-180-1
...., 272 cycles) at 1033 K, a plastic strain range of 0.5%, and an R -ratio (ε min /ε max ) of 0. Cycling was continued at 298 K under the same conditions: it failed on the first loading cycle, even though the life of such a specimen is predicted to be thousands of cycles without the high-temperature...
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
... also occur when plastic deformation is limited to a small volume of material and not macroscale visible, while the fracture process is still microvoid coalescence. This is the case when the ductile fracture mechanism of microvoid coalescence is constrained to a plane-strain fracture mode (referred...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001852
EISBN: 978-1-62708-241-9
... are tabulated in Table 1 ) Fig. 6 Tensile test at room and 200 °C temperatures Fig. 3 Specimen geometry for monotonic and cyclic tests (all dimensions in mm) Fig. 4 Three different tensile test results Fig. 5 Stress-plastic strain log scale plot for Ramberg–Osgood...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003537
EISBN: 978-1-62708-180-1
.... Observation of Plastic Strain Smaller amounts of plastic deformation might be determined via careful measurement if the surfaces of the component are relatively smooth. The ability to see a neck in a tensile specimen depends on the amount of strain hardening and to some extent, the amount of strain-rate...
Series: ASM Failure Analysis Case Histories
Volume: 3
Publisher: ASM International
Published: 01 December 2019
DOI: 10.31399/asm.fach.v03.c9001802
EISBN: 978-1-62708-241-9
... line formation due to plastic deformation, which progresses to cracking at high strain levels. The cracks appear to initiate from slip lines and extend in shear (mode II) manner. References References 1. Gall K. , Yang N. , Sehitoglu H. , and Chumlyakov Y. : “ Fracture...
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
... in tensile testing of the order of 10 −3 to 10 −2 per minute do not typically cause deformation twinning at room temperature, but a hammer blow will cause twinning.) When deformation twinning does occur during plastic straining, it is usually activated after prior deformation by slip (but see subsequent...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003538
EISBN: 978-1-62708-180-1
... of 10 −3 to 10 −2 per minute do not typically cause deformation twinning at room temperature, but a hammer blow will cause twinning.) When deformation twinning does occur during plastic straining, it is usually activated after prior deformation by slip (but see subsequent information). That is, single...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006797
EISBN: 978-1-62708-295-2
... point for the low-carbon steel and the stress at 0.2% offset for the strain-hardening material). Load limits for parts made of materials that strain harden significantly when stressed in the plastic region can be estimated by limit analysis, as can those for parts made of other materials whose stress...