Prismatic glide in divalent h.c.p. metals

Couret, Alain; Caillard, D.; Püschl, Wolfgang; Schoeck, G.

doi:10.1080/01418619108213936

Cited by 52 publications

(42 citation statements)

References 14 publications

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“…8) Furthermore, earlier studies 3,19) showed that slip lines observed at the polished surface of Mg specimens deformed at intermediate and high temperatures are typical of cross-slip. This was supported by the other authors 11,13,15) who considered mechanisms of cross-slip in Mg. Attempts to describe the deformation behavior of Mg using other models of thermally activated slip resulted in inadequately low activation energies.…”

Section: )supporting

confidence: 49%

“…It is noteworthy that this study was performed on single-crystal samples with orientations preventing basal slip. Later, Couret et al 15) came to the conclusion that cross-slip by the Friedel mechanism could hardly be realized even at high temperatures. These conclusions were based on calculations performed using a modified Friedel model accounting for the stress-field anisotropy around the dislocation.…”

Section: Mechanisms Of Plastic Deformationmentioning

confidence: 99%

“…No single interpretation of deformation processes can be suggested to describe the behavior of Mg in the entire temperature range. 8,10,11,[13][14][15] The deformation behavior of Mg was found to be very complicated at temperatures above 523 K. The approach 10,14) explaining this behavior in terms of the transition from hightemperature to low-temperature dislocation climb seems to be inconsistent due to the following reasons:…”

Section: An Examination Of Deformation Mechanisms Inmentioning

confidence: 99%

“…Despite several studies on mechanisms of plastic deformation in pure Mg, 8,10,11,[13][14][15] its deformation behavior is still under discussion. The reason is that, to date, the complete and clear view on the deformation behavior of magnesium is hardly available for wide ranges of temperatures and strain rates, and theoretical models applied to explain the deformation behavior are greatly different.…”

Section: Mechanisms Of Plastic Deformationmentioning

confidence: 99%

“…17) Couret et al believe that the only possible mechanism of hot deformation is cross-slip by the Friedel-Escaig mechanism. 15) Hence, there are different interpretations of operating deformation mechanisms in Mg. Moreover, this brief review shows that most of the studies were performed under creep conditions at low strain rates, whereas of more interest are deformation-mechanism maps determining mechanical properties of a material at higher strain rates, i.e., under active loading.…”

Section: Mechanisms Of Plastic Deformationmentioning

confidence: 99%

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Deformation Behavior and Controlling Mechanisms for Plastic Flow of Magnesium and Magnesium Alloy

2003

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Deformation behavior of pure Mg and Mg alloy were studied in the temperature range of 423 to 773 K and at strain rates of 10 À4 -10 À2 s À1 . Three temperature regions can be categorized both in Mg and Mg alloy. The deformation behavior in Mg can be described by an exponantional law at temperatures below 523 K. At the higher temperatures a power law of deformation is valid with the stress exponent close to n ¼ 7 in the intermediate (523-623 K) and 2.2 in the high (673-773 K) temperature ranges. The alloying of Mg with elements such as Zn changes the phenomenology of plastic deformation. An exponantional law is operative at temperatures below 473 K. At above 473 K deformation obeys a power law. The stress exponent is close to n ¼ 7 at intermediate temperatures (473-523 K) and 5 in the high temperature range. An analysis of experimental results shows that alloying changes the controlling mechanisms of plastic deformation and so leads to different deformation behavior in pure Mg and Mg alloy that can be associated with decreasing stacking fault energy (SFE) in Mg alloy. The effect of SFE on the mechanisms of plastic deformation when alloying Mg is discussed.

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Section: )supporting

confidence: 49%

Section: Mechanisms Of Plastic Deformationmentioning

confidence: 99%

Section: An Examination Of Deformation Mechanisms Inmentioning

confidence: 99%

Section: Mechanisms Of Plastic Deformationmentioning

confidence: 99%

Section: Mechanisms Of Plastic Deformationmentioning

confidence: 99%

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Deformation Behavior and Controlling Mechanisms for Plastic Flow of Magnesium and Magnesium Alloy

2003

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Dislocations in Crystals

Bacon

2006

Materials Science and Technology

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Deformation mechanism of highly textured AZ31 sheet under high strain rates

Liu¹,

Mao²,

Liu³

et al. 2017

Materialwissenschaft Werkst

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In this study, in‐plane tension behavior of AZ31 magnesium sheet was measured in rolling direction, transverse direction and 45° direction under high strain rates of 600 s‐1, 1200 s‐1 and 2400 s‐1 at room temperature using a Split Hopkinson Tension Bar (SHTB). The microstructures after high strain rates deformation were observed by optical micrography. The anisotropic behavior was negligible and marginally positive strain rate effects were observed in all deformation directions. Texture analysis of the sheet demonstrated that three possible deformation mechanisms could apply to AZ31 magnesium alloy sheet under high strain rates tension, those are {101‾1} contraction twinning and/or {101‾1} ‐{101‾2} double twinning, prismatic slip and pyramidal slip. The volume fraction of twinning was decreased with strain rate increasing. Dynamic recrystallization took place upon the strain rate of 2400 s‐1 and the dynamic recrystallization mechanism was attributed to the twinning‐induced dynamic recrystallization.

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Prismatic glide in divalent h.c.p. metals

Cited by 52 publications

References 14 publications

Deformation Behavior and Controlling Mechanisms for Plastic Flow of Magnesium and Magnesium Alloy

Deformation Behavior and Controlling Mechanisms for Plastic Flow of Magnesium and Magnesium Alloy

Dislocations in Crystals

Deformation mechanism of highly textured AZ31 sheet under high strain rates

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