Fatigue hardening in alloys of low stacking-fault energy

Avery, Donald H.; Backofen, W. A.

doi:10.1016/0001-6160(63)90003-8

Cited by 46 publications

(9 citation statements)

References 9 publications

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“…The model supposes that the temperature dependence of the saturation stress is due to dislocation loop-point defect interactions. Experimental results on the effect of temperature on the cyclic strain hardening of copper crystals and other evidence in the literature (Avery and Backofen 1963) support the idea derived from the debris model that the hardening rate in the rapid hardening stage increases with decreasing resistance to cross-slip. It has been found that increasing the test temperature (decreasing the resistance to cross slip) results in an increase in the hardening rate in the rapid hardening stage.…”

Section: Discussionsupporting

confidence: 78%

“…(2) Single crystals and polycrystals show the same qualitative hardening behaviour (Avery and Backofen 1963 The first 10 cycles of a copper crystal subjected to a reversed plastic strain amplitude of y = 2 0.02 at 2 0 0 "~.…”

mentioning

confidence: 94%

“…metals having a low stacking-fault energy harden a t lower rates than do those of higher stacking-fault energy (Avery and Backofen 1963).…”

mentioning

confidence: 96%

“…The argument put forward to explain the absence of cyclic work hardening during saturation is that cross-slipping screw dislocations of opposite sign may be able to annihilate each other and thus set up a dynamic recovery process analogous to the dynamic recovery process occurring in stage I11 tensile deformation. The premise of this argument then suggests that the saturation stress should exhibit a temperature dependence like that An alternative model for saturation hardening based on the bowing of dislocations has been suggested by Avery and Backofen (1963). This model employs a reversible strain mechanism and unless some self -hardening mechanism is involved, bowing dislocations should relax along the same stress-strain curve along which bowing occurred and no hysteresis loop should be produced.…”

mentioning

confidence: 99%

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A debris mechanism of cyclic strain hardening for F.C.C. metals

Feltner

1965

Philosophical Magazine

121

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Section: Discussionsupporting

confidence: 78%

mentioning

confidence: 94%

“…metals having a low stacking-fault energy harden a t lower rates than do those of higher stacking-fault energy (Avery and Backofen 1963).…”

mentioning

confidence: 96%

mentioning

confidence: 99%

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A debris mechanism of cyclic strain hardening for F.C.C. metals

Feltner

1965

Philosophical Magazine

121

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“…The hardening depends on the stacking faults energy. The higher the stsacking fault energy, the quicker the hardening [4]. 3.…”

Section: Introductionmentioning

confidence: 99%

Fatigue Hardening of CuZn Alloys

Lukáš

Klesnil

1967

Physica Status Solidi (b)

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The initial stage of the fatigue processfatigue hardeningis studied for three Cu-Zn alloys with different stacking fault energies in the region of low stress amplitudes (lifetimes of order lo5 cycles and higher). The study involves both measurements of the mechanical properties in the microstrain region and transmission electron microscopy. All measurements confirm the strong influence of the stacking fault energy on the course of the hardening. Fatigue hardening arises from both short-range and long-range stress fields. The contribution of the long-range stress fields to the total hardening decreases with decreasing stacking fault energy.Das erste Stadium des Ermiidungsprozessesder ProzeB der Verfestigungwird an drei Cu-Zn-Legierungen mit verschiedenen Stapelfehlerenergien im Bereich niedriger Spannungsamplituden (Lebensdauer lo5 Zyklen und mehr) verfolgt. Fur die Untersuchungen wurden Messungen der mechanischen Eigenschaften im Mikrodehnungsgebiet und elektronenmikroskopische Durchstrahlungsm fnahmen benutzt. Alle Messungen bestiitigten den starken EinfluB der Stapelfehlerenergie auf den Verlauf der Verfestigung. Fur die Verfestigung sind die kurz-und weitreichenden Spannungsfelder verantwortlich. Der Beitrag der weitreichenden Spannungsfelder zu der Gesamtverfestigung nimmt mit sinkender Stapelfehlerenergie ab. 40'

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Amplitudenwechselversuche an der α‐Kupfer‐Zinnlegierung CuSn6

Lensing

Mayr

Macherauch

1979

Materialwissenschaft Werkst

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An Proben aus der ol-Kupfer-Zinnlegierung CuSn6 wurden gesamtdehnungsgesteuerte Ein-und Zweistufenversuche durchgefuhrt. Zu Beginn der Beanspruchung weisen die Wechselverformungskurven bei Einstufenbelastung einen stdrken Verfestigungsanstieg auf, der mit wachsender Versuchsdauer kleiner wird. Eine Sattigung der Spannungsamplitude tritt dagegen nicht auf. Bei Zweistufenversuchen wird im An-schluI3 an einen Wechsel von kleiner zu groRer Amplitude eine ausgepragte Wechselverfestigung beobachtet. Nach einem Wechsel von gro-Rer zu kleiner Amplitude wird dagegen eine starke Wechselentfestigung gemessen. Bei wiederholten Amplitudenwechseln charakterisieren diese Ver-und Entfestigungsvorgange das Werkstoffverhalten bis zum ProbenanriR.

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Fatigue hardening in alloys of low stacking-fault energy

Cited by 46 publications

References 9 publications

A debris mechanism of cyclic strain hardening for F.C.C. metals

A debris mechanism of cyclic strain hardening for F.C.C. metals

Fatigue Hardening of CuZn Alloys

Amplitudenwechselversuche an der α‐Kupfer‐Zinnlegierung CuSn6

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