Structure and strengthening of Al-Mg alloys during hot working

Raghavan, M.; Shapiro, E. Ya.

doi:10.1007/bf02700445

Cited by 19 publications

(2 citation statements)

References 15 publications

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“…In this work, is calculated to be 2.28 μm −1 for the as-SPSed sample, so the values of , and are estimated to be 70.5 kJ/mol, −11.4 and 0.585 μm −1 , respectively. The value of can be estimated using the following equation: where is the activation energy for the plastic deformation of pure Al which can take a value of 149.0 kJ/mol [22]. Taking , the value of is estimated to be 219.5 kJ/mol.…”

Section: Discussionmentioning

confidence: 99%

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Effects of annealing and extrusion on the microstructure and tensile properties of ultrafine-grained Al fabricated by spark plasma sintering

et al. 2021

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Ultrafine-grained Al samples were fabricated by spark plasma sintering (SPS) of a mechanically milled nanocrystalline powder. The effects of annealing and extrusion on the microstructure and tensile properties of the as-SPSed samples were investigated. Annealing removed the nanopores and caused significant coarsening of Al grains in the interparticle boundary (IPB) regions, leading to the formation of a heterogeneous structure consisting of coarse grains, ultrafine grains and Al 4 C 3 /Al 2 O 3 nanoparticles. Hot extrusion also eliminated the nanopores and resulted in the formation of a heterogeneous structure containing enhanced volume fraction of ultrafine grains and finer nanoparticles. These microstructural changes rendered a much improved YS and UTS of 251 and 288 MPa, respectively, and excellent tensile ductility (elongation to fracture: 12.7%). The improvement in mechanical properties can be attributed to grain boundary and nanoparticle strengthening, strain delocalisation of the heterogeneous structure and improvement of the bonding strength of IPBs.

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Section: Discussionmentioning

confidence: 99%

“…where Q 0 is the activation energy for the plastic deformation of pure Al which can take a value of 149.0 kJ/ mol [22]. Taking DQ = 70.5kJ/mol, the value of Q is estimated to be 219.5 kJ/mol.…”

Section: Microstructuresmentioning

confidence: 99%