Friction stress and back stress in cyclically deformed Ni3Ge single crystals

Pak, Han-Ryong; Chu, Jinn; Kato, Masaharu; Pope, D. P.

doi:10.1016/0025-5416(88)90236-4

Cited by 9 publications

(2 citation statements)

References 14 publications

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“…Evolution of effective stresses during fatigue is not well documented, especially for interstitial solid solutions. It is unusual to observe a decrease in the effective stress since this component of the flow stress tends either to remain constant or to increase, as is observed in the planar slip 70/30 cr-brass [3,21] or in Ni,-Ge single crystals [22] where the flow stress is mainly controlled by the effective stress. This could suggest a role of the solute element that depends on its nature (interstitial or substitutional).…”

Section: Tea4 Analysismentioning

confidence: 85%

Effective Stresses and Microstructure in Cyclically Deformed 316l Austenitic Stainless Steel: Effect of Temperature and Nitrogen Content

Vogt

Magnin

Foct

1993

Fatigue Fract Eng Mat Struct

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This paper reports a study on the factors influencing dislocation slip during cyclic deformation of 316L austenitic stainless steel. TEM investigations show that low temperature and interstitial nitrogen content favour planar slip and lead to higher erective stress values. Measurements of effective and internal stresses with the Handfield-Dickson technique indicate that the contribution of nitrogen in the effective component is more important than that of temperature. It is deduced that nitrogen acts through a pinning effect, while low temperature exerts an effect on friction stress. The results also suggest that cyclic plasticity could modify the short range order leading to a redistribution of nitrogen. NOMENCLATURE N = number of cycles ua = cyclic stress amplitude a,, = effective stress amplitude ui = internal stress amplitude A[, = total strain range t, = total strain amplitude 2 = total strain rate

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Section: Tea4 Analysismentioning

confidence: 85%

Effective Stresses and Microstructure in Cyclically Deformed 316l Austenitic Stainless Steel: Effect of Temperature and Nitrogen Content

Vogt

Magnin

Foct

1993

Fatigue Fract Eng Mat Struct

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“…Cyclic deformation experiments on various single crystal L1 2 alloys [47][48][49][50] have revealed that the orientation dependent tension-compression asymmetry is stable during cyclic deformation at temperatures below peak strength [47][48][49][50]. For most experiments, significant cyclic hardening was observed.…”

Section: Characteristics Of Cyclic Deformationmentioning

confidence: 97%

Cyclic deformation, damage, and effects of environment in the Ni3Al ordered alloy at elevated temperature

1993

International Journal of Fatigue

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Orientation dependence of cyclic stress asymmetry in Ni3Ge single crystals

Inoue

Hsiung

Kato

et al. 1991

Phys. Stat. Sol. (a)

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Cyclic flow‐stress measurements at room temperature are performed on Ni3Ge single crystals as a function of stress and strain amplitude. The cyclic flow‐stress is found to be higher in compression than in tension for stress orientations [345] and [245]. This flow‐stress asymmetry became greater with increasing plastic‐strain amplitude when {111} slips are operative. However, in a higher strain regime (>1 × 10−4) where {001} slip systems are also activated, the stress asymmetry for orientation [345] became smaller with increasing plastic‐strain amplitude. For orientation [2 3 16], the cyclic flow‐stress is higher in tension than in compression. The cyclic‐stress asymmetry properties can be attributed to the thermally activated cross‐slip of screw dislocations from {111} to {010}. The decrease in the stress asymmetry observed in orientation [345] at the higher strain regime (>1 × 10−4) is probably caused by the change in the dominant slip systems from the octahedral to cube slips.

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Friction stress and back stress in cyclically deformed Ni3Ge single crystals

Cited by 9 publications

References 14 publications

Effective Stresses and Microstructure in Cyclically Deformed 316l Austenitic Stainless Steel: Effect of Temperature and Nitrogen Content

Effective Stresses and Microstructure in Cyclically Deformed 316l Austenitic Stainless Steel: Effect of Temperature and Nitrogen Content

Cyclic deformation, damage, and effects of environment in the Ni3Al ordered alloy at elevated temperature

Orientation dependence of cyclic stress asymmetry in Ni3Ge single crystals

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