Ab initio calculations of the generalized stacking fault energy in aluminium alloys

Muzyk, M.; Pakieła, Zbigniew; Kurzydłowski, K. J.

doi:10.1016/j.scriptamat.2011.01.034

Cited by 120 publications

(79 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…from 142.4 mJ/m 2 to 135.0 mJ/m 2 , but also reduces the other three extremal energy points. This is consistent with previous theoretical calculations [8] and experimental measurement results [55]. Muzyk et al [8] reported that alloying with Mg would increase the tendency for formation of partial dislocations and twinnability of Al.…”

Section: Effect Of Mg Alloying On Gpfe Of Al and Suzuki Segregation Osupporting

confidence: 92%

“…This is consistent with previous theoretical calculations [8] and experimental measurement results [55]. Muzyk et al [8] reported that alloying with Mg would increase the tendency for formation of partial dislocations and twinnability of Al. In the present work, we verified that Mg alloying can promote twinning due to the increased  a and decreased  UTFE / USFE ,  UTFE - USFE , compared with pure Al (as shown in Table 4).…”

Section: Effect Of Mg Alloying On Gpfe Of Al and Suzuki Segregation Osupporting

confidence: 92%

“…Without considering the effect of mutual interactions of Mg solutes at higher concentrations upon the GPFE of Al, Muzyk et al [8] has predicted that Mg alloying can promote twinning in Al.…”

Section: Effects Of Varying Mg Concentrations On the Gpfe Curve Of Almentioning

confidence: 99%

“…This has been attributed to the high intrinsic stacking fault energy  ISFE and a high ratio between unstable twinning fault energy  UTFE and unstable stacking fault energy  USFE . Promisingly, Mg has been reported to be a potential alloying element to reduce  ISFE in Al [8]. By using the Layer Korringa Kohn Rostoker methodology, Schulthess et al [9] calculated the  ISFE of disordered Al-Mg alloys and showed a nearly linear decrease of  ISFE with increasing Mg content (below 40 at.% Mg).…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Impurity effect of Mg on the generalized planar fault energy of Al

et al. 2016

View full text Add to dashboard Cite

Generalized Planar Fault Energy (GPFE) curves are widely used to evaluate the deformation behavior of metals and alloys. In the present work, a systematic analysis of the microscopic plastic deformation mechanism of face-centered cubic Al in comparison to Cu was conducted based on GPFE curves generated via first-principles calculations. Focus has been put on the effects of Mg impurities in terms of local concentration and local atomic arrangement nearby the deformation plane, upon the GPFE curve of Al, with the aim to investigate the twinnability of Al-Mg alloys subjected to plastic deformation.It is found that Mg exhibites a Suzuki segregation feature to the stacking fault of Al, either intrinsic or extrinsic. Mg atoms residing in the stacking fault plane can decrease the intrinsic stacking fault energy  ISFE and enhance the twinning propensity of Al. However, the  ISFE value does not decrease monotonically with increasing Mg concentration in the alloy, and a continuous twinnability increase with increasing Mg content is not observed. It is also seen that different local concentrations and atomic configurations of Mg atoms in the vicinity of deformation plane could yield a large variation of  ISFE and the twinning propensity of Al. It is proposed that Mg alloying cannot substantially enhance the twinning propensity of Al alloys.

show abstract

Section: Effect Of Mg Alloying On Gpfe Of Al and Suzuki Segregation Osupporting

confidence: 92%

Section: Effect Of Mg Alloying On Gpfe Of Al and Suzuki Segregation Osupporting

confidence: 92%

Section: Effects Of Varying Mg Concentrations On the Gpfe Curve Of Almentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Impurity effect of Mg on the generalized planar fault energy of Al

et al. 2016

View full text Add to dashboard Cite

show abstract

“…The high angle grain boundaries (>15 ) and low angle ones (5-15 ) are colored as blue and red lines, respectively. Considering the high stacking fault energy of the material (%162 mJ m À2 ), [40] the subgrains development and refinement are logically expected. Interestingly, the substructure refinement is more pronounced within some restricted regions.…”

Section: Micro-shear Bandsmentioning

confidence: 99%

Grain Refinement through Shear Banding in Severely Plastic Deformed A206 Aluminum Alloy

et al. 2017

View full text Add to dashboard Cite

The present work is conducted to study the microstructure and texture evolutions in an as-cast A206 aluminum alloy after applying severe plastic deformation. Toward this end, the material is severely deformed through accumulative back extrusion (ABE) technique at 200 C and followed by assessing the room temperature mechanical properties of the products. The macro shear-bands formation in the highly strained regions can result in grain refinement through the geometric dynamic recrystallization mechanism. A significant refinement is also characterized within the micro shear-bands; this is attributed to the intensified substructure development and the occurrence of continuous dynamic recrystallization. The corresponding inverse pole figure maps show similar orientation for these newly refined grains with the parent ones. A random texture is produced through sub-grain rotation to dissimilar orientation at the intersection of micro-bands. The assessment of mechanical properties of the processed materials reveal significant increase in both yield and ultimate tensile strength values. The hardness profiles also demonstrate a relatively homogenous microstructure after three and five ABE passes holding a mean hardness value of 183 Vickers.

show abstract

Effect of Fiber Orientation on Microstructure and Texture Evolution During the Cold‐Rolling of Al–Mg–Si Alloy

Chromiński

Lewandowska

2022

Adv Eng Mater

View full text Add to dashboard Cite

A material with a strong double fibrous texture is subjected to rolling with various deformation paths—unidirectionally and with 90° rotations about the normal direction (cross‐rolling). Additionally, the orientation of the initial fiber is manipulated to force unlikely grain rotations. The purpose of these procedures is to study the dependence between crystallographic and morphological texture changes caused by the rolling. Microstructure observations show that deformation mechanism responsible for the final microstructure depends on the initial fiber orientation. The crystallographic texture is related to the deformation mode and leads toward expected orientations; however, the initial grain boundaries alignment has a strong impact on the final microstructure. Unidirectional rolling results in typical orientations along the β‐fiber in all investigated cases. The texture created during the more complex deformation path with inset rotations follows the geometrical constraints for fourfold symmetry, even if this required unlikely rotations toward the α‐fiber.

show abstract

Ab initio calculations of the generalized stacking fault energy in aluminium alloys

Cited by 120 publications

References 21 publications

Impurity effect of Mg on the generalized planar fault energy of Al

Impurity effect of Mg on the generalized planar fault energy of Al

Grain Refinement through Shear Banding in Severely Plastic Deformed A206 Aluminum Alloy

Effect of Fiber Orientation on Microstructure and Texture Evolution During the Cold‐Rolling of Al–Mg–Si Alloy

Contact Info

Product

Resources

About