Comment on “Influence of prior deformation temperature on strain induced martensite formation and its effect on the tensile strengthening behaviour of type 304 SS studied by XRDLPA. Materials Science &amp; Engineering A 826 (2021) 141960”

Gubicza, Jenő

doi:10.1016/j.msea.2021.142450

Materials Science and Engineering: A

2022

DOI: 10.1016/j.msea.2021.142450

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Comment on “Influence of prior deformation temperature on strain induced martensite formation and its effect on the tensile strengthening behaviour of type 304 SS studied by XRDLPA. Materials Science & Engineering A 826 (2021) 141960”

Jenő Gubicza

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2024

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Cited by 3 publications

References 19 publications

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Improving density and strength-to-ductility ratio of a 3D-printed Al–Si alloy by high-pressure torsion

Muñoz,

Komissarov,

Avalos

et al. 2024

J Mater Sci

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Good combination of strength and ductility in metallic materials is always desired. To this end, this study assesses the combination of two modern manufacturing processes, namely additive manufacturing (AM) and severe plastic deformation, for an AlSi11Cu alloy. Laser powder bed fusion (L-PBF) produced an alloy with spherical pores with an average size of 42 μm, representing a volume fraction lower than 0.15%. At the mesoscale, the alloy showed a cellular microstructure made up of Al cells and Si-rich boundaries with an average size of 0.69 µm, which were broken down by the high-pressure torsion (HPT) process into ultrafine particles smaller than 0.41 µm. The HPT process transformed the columnar grains of the as-built material into ultrafine-grained grains around the disk edges, while the central zone conserved the as-built characteristics for a number of HPT turns smaller than ¼. HPT processing at room and warm temperatures gave rise to strength–ductility improvements with yield strengths and elongations larger than 400 MPa and 10%, respectively. The good strength–ductility trade-off was related to the porosity decrease, the breakdown of the interconnected network into particles of ultrafine size, the grain size reduction due to the dislocation density increase, and the formation of precipitates and Si-rich particles of different sizes. Thus, AM and HPT improved the grain boundary and precipitation strengthening, giving rise to an Al–Si alloy with superior mechanical properties. Graphical abstract

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Improving density and strength-to-ductility ratio of a 3D-printed Al–Si alloy by high-pressure torsion

Muñoz,

Komissarov,

Avalos

et al. 2024

J Mater Sci

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Effect of warm rolling and heat treatment on heterogeneous austenite morphology and tensile property of 3Mn steel

Zhao,

Song,

Zhang

et al. 2024

Materials & Design

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Dislocation Density in Ceramics Processed by Severe Plastic Deformation via High-Pressure Torsion

Edalati,

Enikeev

2024

Materials

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This study investigates the dislocation density in ceramics processed by severe plastic deformation at room and elevated temperatures via high-pressure torsion (HPT) for various numbers of turns and shear strains. Ceramics, characterized by ionic or covalent bonding, typically exhibit brittleness due to limited dislocation activity. However, HPT enables significant microstructural transformations in ceramics including dislocation nucleation and accumulation. Despite recent advances in the visualization of such dislocations by transmission electron microscopy (TEM), there is a lack of comprehensive reports on the quantification of dislocation density in severely deformed ceramics. This paper addresses this gap by employing X-ray diffraction (XRD) analysis to quantify dislocation density and crystallite size in a few oxide ceramics. Results demonstrate that HPT induces exceptionally high dislocation densities comparable to theoretical upper limits of dislocation density in ceramics, on the order of 1015 to 1016 m−2, with crystallite sizes reduced to the nanometer scale. These findings significantly enhance the understanding of dislocation behavior in ceramics and suggest a potential approach for tuning the mechanical and functional properties of these materials by dislocations.

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Comment on “Influence of prior deformation temperature on strain induced martensite formation and its effect on the tensile strengthening behaviour of type 304 SS studied by XRDLPA. Materials Science & Engineering A 826 (2021) 141960”

Cited by 3 publications

References 19 publications

Improving density and strength-to-ductility ratio of a 3D-printed Al–Si alloy by high-pressure torsion

Improving density and strength-to-ductility ratio of a 3D-printed Al–Si alloy by high-pressure torsion

Effect of warm rolling and heat treatment on heterogeneous austenite morphology and tensile property of 3Mn steel

Dislocation Density in Ceramics Processed by Severe Plastic Deformation via High-Pressure Torsion

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