On work-hardening in ordered alloys

Vidoz, A. E.; Brown, L. M.

doi:10.1080/14786436208209116

Cited by 177 publications

(32 citation statements)

References 9 publications

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“…Therefore, superlattice dislocation dipoles are left in the wake of moving superlattice dislocations conraining superjogs. These superjogs are of the type discussed by Vidoz and Brown [23] which can develop tubular APBs.…”

Section: Configurations Of Superlattice Dislocations and Superlatticementioning

confidence: 99%

Superlattice dislocations in L12 ordered alloys and in alloys containing L12 ordered precipitates

Hosson

1986

Materials Science and Engineering

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Section: Configurations Of Superlattice Dislocations and Superlatticementioning

confidence: 99%

Superlattice dislocations in L12 ordered alloys and in alloys containing L12 ordered precipitates

Hosson

1986

Materials Science and Engineering

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“…Therefore, the prominent overshooting effect in Ni3Fe is surely resulted from the strong suppression of secondary slips. This strong overshooting effect was explained by the formation of nonaligned jogs on secondary dislocations through intersections with moving primary dislocations (12).…”

Section: Discussionmentioning

confidence: 99%

“…One is the cross slip of screw segments of superdislocations from {111} to {100} to reduce APB (antiphase domain boundary) energies leading to the sessile configurations, the so-called Kear-Wilsdorf mechanism (11). The other is the formation of APB tubes by nonaligned jogs on superdislocations (12). The formation of APB tubes depends on the operation of the secondary (conjugate) slip system.…”

Section: Introductionmentioning

confidence: 99%

The Overshooting Phenomenon in Intermetallic Compound Ni<SUB>3</SUB>Al Single Crystals Tested in Tension

Aoki

Izumi

1978

Trans. JIM

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The lattice rotation and operative slip systems at each deformation stage were examined by tensile testing at various temperatures from 77 to 1073 K to make clear the contribution of secondary slip systems to the plastic deformation of Ni3A1 single crystals. The overshooting phenomena were observed below 673 K, and after the overshooting the conjugate slip system operated below 296 K. The contribution of secondary slip systems to deformation was small at low temperature, but increased with increasing strain and temperature. Although the work hardening rate showed the positive temperature dependence, the latent hardening did the negative one. The work hardening of Ni3A1 consists of two mechanisms; namely, one is the orientation and temperature dependent one, which causes the positive temperature dependence by the Kear-Wilsdorf mechanism and has no direct bearing on the latent hardening and the other is independent of the positive temperature dependence, which contributes to the latent hardening.

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“…Hence, ordered alloys are particularly suited to investigate the mechanism of work-hardening in metals and alloys where there is only a single slip system. The high work-hardening observed in such alloys was accounted for by Vidoz and Brown [7] and Schoeck [8,9] as due to the creation of APB tubes when glide dislocations intersect forest dislocations. However, to date, there has been no convincing evidence showing the presence of such APB tubes in these alloys.…”

Section: Introductionmentioning

confidence: 98%

Dislocation behaviour in ordered alloys in the presence of frictional forces

Sadananda

Marcinkowski

1973

J Mater Sci

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A detailed numerical analysis has been made of the passing of superlattice dislocations in the presence of frictional forces and the results compared with those for ordinary dislocations. In particular, it was shown that the behaviour of superlattice dislocations is similar to that of ordinary dislocations, only at very high frictional stresses or at very low vertical separations. It was also shown that dipole strength can be increased significantly by decreasing y, the vertical separation, until y reaches a critical value, Yc, when the cross-slip forces due to the internal stresses are sufficient to induce non-thermal cross-slip thus annihilating the passing dislocations. Edge dislocations, on the other hand, cannot annihilate themselves by climb, and hence, smaller vertical separation can be obtained increasing the dipole strength significantly. The effect of thermal and nonthermal cross-slip on the work-hardening of ordered alloys is discussed in detail. For the purpose of illustration, the calculations were made for FeCo. The results, however, are quite general and are applicable to all B2-structure alloys.

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On work-hardening in ordered alloys

Cited by 177 publications

References 9 publications

Superlattice dislocations in L12 ordered alloys and in alloys containing L12 ordered precipitates

Superlattice dislocations in L12 ordered alloys and in alloys containing L12 ordered precipitates

The Overshooting Phenomenon in Intermetallic Compound Ni<SUB>3</SUB>Al Single Crystals Tested in Tension

Dislocation behaviour in ordered alloys in the presence of frictional forces

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