Fatigue of copper-zinc alloys at 100°K

Roberson, J. A.; Grosskreutz, J. C.

doi:10.1016/0001-6160(63)90017-8

Cited by 7 publications

(2 citation statements)

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“…7111 has been shown to increase with decreasing stacking-fault energy, complementing the results of Roberson and Grosskreutz on fatigue strength, and has frequently been found important in fatigue failure processes (see, for example, McEvily and Machlin 1959). Roberson and Grosskreutz (1963) found that their results were not consistent with those of Burghoff and Blank (1948), obtained on similar alloy systems at room temperature, and this they concluded was probably because of the importance of a further parameter, diffusivity, being introduced.…”

Section: Discussionmentioning

confidence: 65%

“…For an alloy system this in turn indicates a decrease in the strain hardening rate, as identified by stage I1 deformation in single crystals, implying that at a stress level greater than the new critical resolved shear stress there will be a greater plastic strain for a given stress increment and, if a fatigue criterion were based simply on the degree of plastic strain, it would imply a lower fatigue strength for the alloyed material. However, in the low-strain-amplitude fatigue tests of Roberson and Grosskreutz (1963), conducted at 1 0 0 " ~ to obviate the influence of diffusion processes, the reverse was shown to be the case, i.e. a low stacking-fault energy was associated with a high fatigue strength.…”

Section: Discussionmentioning

confidence: 95%

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The influence of diffusion coatings on the fatigue strength of copper

Dover¹,

Jones²

1969

J. Phys. D: Appl. Phys.

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It has been found possible to increase the fatigue strength of copper by selectively alloying a thin layer at the surface. The three alloy systems copper-nickel, copper-silver and copper-zinc were investigated, and the fatigue strength was shown to be independent of the degree of solute penetration and of its mode of distribution, when tested at room temperature in the normal laboratory environment. The greatest increase in fatigue strength was obtained with the copper-zinc surface alloy, for which an increase of 15% was recorded.The increased fatigue strength is thought to be dependent both on the new value of τIII, the threshold stress for stage III hardening in single crystals, and on the relatively greater thermal diffusivity of the foreign atoms introduced; the improvement in fatigue resistance was limited to alloy systems in which the solutes possessed a higher diffusion rate than the copper.

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Section: Discussionmentioning

confidence: 65%

Section: Discussionmentioning

confidence: 95%

The influence of diffusion coatings on the fatigue strength of copper

Dover¹,

Jones²

1969

J. Phys. D: Appl. Phys.

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Dislocation substructure in the surface layer of fatigued Al and Ni

Krejčí

Lukáš

1971

Phys. Stat. Sol. (a)

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The dislocation substructure in both the surface layer and the interior of Al and Ni polycrystals fatigued in push–pull was studied by means of transmission electron microscopy. A fatigue cell structure was found in the whole volume of the specimens after high‐stress cycling. Low‐stress cycling caused the formation of cell structures in the neighbourhood of the surface relief while the remaining volume contained dislocation bands. The stacking fault energy influence on dislocation substructure caused by fatigue is discussed.

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