The plasticity of particle-containing polycrystals

Humphreys, F.J.; Kalu, Peter N.

doi:10.1016/0956-7151(90)90164-c

Cited by 80 publications

(20 citation statements)

References 17 publications

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“…Beyond a particle size of 3-4 µm the amount of rotation remains essentially unchanged. In polycrystalline material, the measured local rotations are smaller [4] and show a considerable amount of scatter [6]. When the particles are very small, of the order of 100 nm, evenly dispersed and closely spaced , not only are the PDZ and associated rotations very small, the deformation is generally more homogeneous and intergranular misorientations are reduced throughout the material [7,8].…”

Section: Introductionmentioning

confidence: 98%

“…This difference gives rise to highly misoriented regions within the PDZ, which act as preferential nucleation sites during recrystallization. The local misorientation was studied extensively by Humphreys and collaborators using both TEM and X-ray diffraction on single crystals [3,4] and later using electron backscattered diffraction (EBSD) on single crystal [5] and polycrystalline samples [6,7]. They found that the amount of rotation in the PDZ in a single crystal increased with particle size with the rotation near a 4 µm being almost twice that near a 1 µm particle.…”

Section: Introductionmentioning

confidence: 99%

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The kinematics of deformation and the development of substructure in the particle deformation zone

Fonseca

2015

IOP Conf. Ser.: Mater. Sci. Eng.

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Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

The kinematics of deformation and the development of substructure in the particle deformation zone

Fonseca

2015

IOP Conf. Ser.: Mater. Sci. Eng.

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“…[20,21] This involves the formation and growth of new grains from cells or subgrains in the deformation zones that form around nondeforming particles in the microstructure. Lower recovery rates due to higher values of Z may facilitate formation of fine cells or subgrains in deformation zones surrounding nondeforming constituent particles, and thus the PSN reaction.…”

Section: Discussionmentioning

confidence: 99%

The Effect of Friction Stir Processing on the Microstructure and Mechanical Properties of an Aluminum Lithium Alloy

Giles

Oh-ishi

Zhilyaev

et al. 2008

Metall Mater Trans A

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Friction stir processing (FSP) was conducted on a wrought plate of AA2099 to refine and homogenize the microstructure and enhance the through-thickness ductility and fracture resistance. Optical microscopy (OM), orientation imaging microscopy (OIM), and transmission electron microscopy (TEM) methods were employed to evaluate microstructure and microtexture in as-received material and in material subjected to FSP as well as postprocessing heat treatments. Hardness and orientation-dependent tensile test data were combined with anticlastic bending fatigue data to characterize the as-received, processed, and processed and heat-treated conditions of the material.

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“…This rotation axis was called the lattice rotation axis (LRA). Such a crystal rotation about a h112i axis was experimentally recognized by TEM observation, 14,15) and the resultant LRA orientation was analyzed by the CRA method. 13) Tables 1 and 2 list the LRA orientations of the slip systems in the W and C crystals.…”

Section: Methodsmentioning

confidence: 99%

Characteristics of Strain-Induced Boundary Migration as Evaluated by the Crystal Rotation Axis Method in (001) [100] and (112) [11\\bar1] Aluminum Bicrystal Deformed by Plane-Strain Compression

2010

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An aluminum bicrystal with (001) [100] and (112) [11 " 1 1] orientation was deformed by plain-strain compression to a strain of 0.34. The types of slip systems responsible for producing crystal rotations relative to the initial orientations were clarified by the crystal rotation axis method. In the (001) [100] crystal, an affected zone developed along the grain boundary, which revealed a variety of slip systems in operation; the operation of some of these systems could be predicted from the Schmid factor while that of the remaining systems could not. The unpredictable slip systems were activated by the formation of cross slips. After annealing at 400 C for 30 s, recrystallization that occurred was characterized by strain-induced boundary migration. The recrystallized area had the same crystal orientation as that of the affected zone of the (001) [100] crystal. By using the crystal rotation axis method, it was determined that the affected zone was the origin of the strain-induced boundary migration.

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The plasticity of particle-containing polycrystals

Cited by 80 publications

References 17 publications

The kinematics of deformation and the development of substructure in the particle deformation zone

The kinematics of deformation and the development of substructure in the particle deformation zone

The Effect of Friction Stir Processing on the Microstructure and Mechanical Properties of an Aluminum Lithium Alloy

Characteristics of Strain-Induced Boundary Migration as Evaluated by the Crystal Rotation Axis Method in (001) [100] and (112) [11\\bar1] Aluminum Bicrystal Deformed by Plane-Strain Compression

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