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stress-relaxation testing

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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 Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003136
EISBN: 978-1-62708-199-3
... annealing ( Ref 6 and 7 ). Figure 6 illustrates these effects for copper alloyed with 5% Sn (C51000). Fig. 5 Stress relaxation in C17200 at two levels of initial stress. Data are for beryllium copper (1.9% Be) strip, 0.38 mm (0.015 in.) thick. Open symbols represent initial test stress equal to...
Series: ASM Handbook
Volume: 8
Publisher: ASM International
Published: 01 January 2000
DOI: 10.31399/asm.hb.v08.9781627081764
EISBN: 978-1-62708-176-4
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003025
EISBN: 978-1-62708-200-6
... and temperature dependence of the relationship between stress and strain may be superposable and therefore essentially equivalent ( Ref 5 , 6 , 7 , 8 , 9 , 10 ). Time- and temperature-dependent viscoelastic properties can be examined experimentally by creep and stress relaxation tests and by...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003026
EISBN: 978-1-62708-200-6
... relative humidity at temperatures above 100 °C (212 °F) in an autoclave. Such tests are known as highly accelerated stress tests (HAST), or “pressure-cooker” tests. THB and HAST tests are rigorous; materials that pass them rarely fail in the field. However, it should be noted that failure mechanisms...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003057
EISBN: 978-1-62708-200-6
...: Identification of crystalline phases Quantitative analysis of mixtures of phases Precision measurement of lattice parameters Determination of the degree of preferred orientation in polycrystalline materials Estimation of mean size of very small crystalline particles, lattice strain, residual stresses...
Series: ASM Handbook
Volume: 10
Publisher: ASM International
Published: 15 December 2019
DOI: 10.31399/asm.hb.v10.a0006632
EISBN: 978-1-62708-213-6
... XRD residual-stress measurement are then presented. The article provides information on measurement of subsurface stress gradients and stress relaxation caused by layer removal. The article concludes with a section on examples of applications of XRD residual-stress measurement that are typical of...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006780
EISBN: 978-1-62708-295-2
... Abstract The principal types of elevated-temperature mechanical failure are creep and stress rupture, stress relaxation, low- and high-cycle fatigue, thermal fatigue, tension overload, and combinations of these, as modified by environment. This article briefly reviews the applied aspects of...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006781
EISBN: 978-1-62708-295-2
... thermal stresses are expected to relax due to loss of stiffness of the system. Therefore, crack growth will result in decreasing stress magnitude of the relaxed stress due to crack growth. Thermal stresses closely approximate constant deflection conditions. Therefore, it was assumed that the crack mouth...
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
... material necking in the simple cross section of a tensile testing specimen (for example, see Fig. 166 in “Medium-Carbon Steels: Atlas of Fractographs,” Fractography , Volume 12 of the ASM Handbook , 1987). The other fracture mode is plane-stress fracture (mode II fracture), which manifests itself as...
Series: ASM Handbook
Volume: 11
Publisher: ASM International
Published: 15 January 2021
DOI: 10.31399/asm.hb.v11.a0006753
EISBN: 978-1-62708-295-2
... these fully evaluated the loads and stresses on the gusset plates nor correctly identified signs of excessive loads. If any of these had not assumed that the gussets were better than the members and performed calculations on the gusset plate stress, they would have quickly realized the error...
Series: ASM Handbook
Volume: 4E
Publisher: ASM International
Published: 01 June 2016
DOI: 10.31399/asm.hb.v04e.a0006278
EISBN: 978-1-62708-169-6
... Tensile-stress-relaxation data for selected types of copper wire Material Temper Length of test, h Temperature Initial stress Percent of initial stress remaining after: °C °F MPa ksi 10,000 h 40 years 0.25 mm (0.01 in.) diameter wire C10200, tinned O61 10,000 27 80 41.0...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001297
EISBN: 978-1-62708-170-2
... the metal is covered by a very thin protective metal fluoride film. As the substrate is consumed, a freestanding film is produced. The most direct way to obtain the stress-strain relations of thin films in tension is by uniaxial testing. In principle, this procedure is...
Series: ASM Handbook
Volume: 13B
Publisher: ASM International
Published: 01 January 2005
DOI: 10.31399/asm.hb.v13b.a0003816
EISBN: 978-1-62708-183-2
...-corrosion cracking in various industrial and chemical environments. It concludes with a discussion on various corrosion testing methods, including aqueous corrosion testing, dynamic corrosion tests, and stress-corrosion testing. aqueous corrosion testing copper copper alloys dynamic corrosion tests...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003024
EISBN: 978-1-62708-200-6
... starting from about 10 s and extending up to 10 years, while dynamic experiments provide data over an effective time interval of 10 −8 to 10 3 s ( Ref 13 , 16 , 17 , 18 , 21 , 24 ). Two additional experimental techniques that may be used to measure viscoelastic properties are stress relaxation tests...
Series: ASM Handbook
Volume: 10
Publisher: ASM International
Published: 15 December 2019
DOI: 10.31399/asm.hb.v10.a0006676
EISBN: 978-1-62708-213-6
... behavior Polymer structure and morphology Primary and secondary relaxation behavior Crystallization processes Influence of fillers in polymers In DMA, the sample is subjected to a periodic stress in one of several different modes of deformation (bending, tension, shear, and compression...
Series: ASM Handbook
Volume: 4B
Publisher: ASM International
Published: 30 September 2014
DOI: 10.31399/asm.hb.v04b.a0005950
EISBN: 978-1-62708-166-5
... phenomena involved. Simulation results were commonly confirmed by microstructural analysis, hardness tests, and dimensional and x-ray diffraction (XRD) residual stress measurements. Although some results (such as prediction of temperature history, hardness distributions, and volume changes) were promising...
Series: ASM Handbook
Volume: 22A
Publisher: ASM International
Published: 01 December 2009
DOI: 10.31399/asm.hb.v22a.a0005421
EISBN: 978-1-62708-196-2
... under uniaxial versus multiaxial tensile-stress conditions. Mesoscale models incorporate the influence of local microstructure and texture on cavitation. The article outlines the descriptions of cavity coalescence and shrinkage. It also describes the simulation of the tension test to predict tensile...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003104
EISBN: 978-1-62708-199-3
...-stress or scratching abrasion with loose abrasive, a rubber wheel test has been found useful. Figure 1 shows test results for a wide range of materials. The least wear-resistant material in Fig. 1 wears 1500 times faster than the most wear-resistant material. Fig. 1 Rubber wheel abrasion test...
Series: ASM Handbook
Volume: 17
Publisher: ASM International
Published: 01 August 2018
DOI: 10.31399/asm.hb.v17.a0006475
EISBN: 978-1-62708-190-0
... not through the surface, the position of the crack is indicated by a detection of the high stresses in the surface at approximately the subsurface crack. Finally, microwave crack detection is very sensitive to crack opening and to the frequency used. Higher frequencies are needed for the smaller...