Extended models of the effects of point-defect dragging on dislocation motion

Simpson, H. M.; Sosin, A.

doi:10.1103/physrevb.16.1489

Cited by 19 publications

(9 citation statements)

References 13 publications

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“…In intermetallics, this anomaly has been explained taking into account the core structure and the cross slip of superdislocations. On the other side, a defect-dislocation interaction could also produce a similar effect [17]. Nevertheless, the modulus in the disordered Fe-3Si wt.% does not show any anomaly (see insert in Fig.…”

Section: Discussionmentioning

confidence: 89%

Mechanical spectroscopy in commercial Fe–6 wt.% Si alloys between 400 and 1000 K

Lambri

Pérez-Landazábal

Cano

et al. 2004

Materials Science and Engineering: A

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Section: Discussionmentioning

confidence: 89%

Mechanical spectroscopy in commercial Fe–6 wt.% Si alloys between 400 and 1000 K

Lambri

Pérez-Landazábal

Cano

et al. 2004

Materials Science and Engineering: A

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“…A decrease in the amount of quenched-in-dislocations and vacancies to be dragged leads to a reduction in the values of martensitic damping controlled by dragging. 49,50) …”

Section: Resultsmentioning

confidence: 99%

Mobility of Twin Boundaries in Fe-Pd-Based Ferromagnetic Shape Memory Alloys

et al. 2016

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The mobility of twin boundaries in (at.%) Fe 70 Pd 30 , Fe 67 Pd 30 Co 3 and Fe 66.8 Pd 30.7 Mn 2.5 has been studied by mechanical spectroscopy. Measurements were carried out in amplitude dependent damping regime. A new model based on the Friedel theory was developed to obtain the activation energy ( 2 kJ/mol) for twin boundaries motion. The model describes the amplitude dependent damping from thermally assisted break-away of dislocations. Interaction processes among twin boundaries, dislocations and vacancies during the recovery of the structure are also discussed. Moreover, a damping peak related to a dislocation dragging mechanism controlled by vacancies migration without break-away, earlier reported in Fe-Pd alloys, was also found in Fe-Pd-Co and Fe-Pd-Mn alloys.

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“…The D l peak has been reported [17,27] to be dependent on amplitude (if g > g crit , which corresponds to the Simpson-Sosin model of point defect dragging by dislocations [81]), rather sensitive to the resonance frequency, and accompanied similarly to the D LT peak by an inverse modulus effect. In [27] this effect was explained to be controlled by a transverse short-range diffusion relaxation delay of single dislocations in the area of shearing antiphase boundaries.…”

Section: L Peakmentioning

confidence: 94%

“…an unusually rapid drop of the yield stress at temperatures 350-370 K (lower temperature anomaly, pronounced for alloys with very low content of carbon [80,81]) and a maximum of the yield stress at elevated temperatures at about 820 K useful for applications at high temperatures. Some structural aspects of these problems, including the deformation behaviour and mechanical relaxations in Fe-Al alloys near the stoichiometric composition Fe 3 Al have been investigated in [82,83].…”

Section: Amplitude Dependent Internal Friction (Hysteretic Effects) Imentioning

confidence: 99%