Micromechanical Modelling of Size Effects in Microforming

Yalçınkaya, Tuncay; Demirci, Aytekin; Simonovski, Igor; Özdemir, İzzet

doi:10.1016/j.proeng.2017.10.865

Cited by 5 publications

(3 citation statements)

References 9 publications

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“…The greater the sample toughness, the greater the stress on the extrusion. When the aluminum alloy is extruded, the loads increase by increasing the height to the diameter ratio [51]. For pure aluminum extrusion, the load of punch rises as the material is restricted back and sideways, which raises the velocity of the inner material quicker than that of the outer content, leading to a longer extruded billet.…”

Section: Extrusion Loadmentioning

confidence: 99%

Response of Various Extrusion Parameters to Different Outputs: Review

Mufutau Azeez,

Aderemi Bello,

Saheed

et al. 2023

E3S Web Conf.

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Extrusion as a process involves the introduction of compressive force to drive metal sample out of the die in order to subject it to plastic deformation which in turn will enhance both mechanical and metallurgical properties of aluminum. One input parameter can as well impact other parameters of extrusion. The extent of mechanical properties improvement and effects on other factors depends on adequate selection of the process (input) parameters. The interaction of these parameters influenced the responses (output parameters) in different way. Therefore, this review paper focused on extrusion processes, different extrusion input and responses and related work by different researchers on how different extrusion parameters influences different responses

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Section: Extrusion Loadmentioning

confidence: 99%

Response of Various Extrusion Parameters to Different Outputs: Review

Mufutau Azeez,

Aderemi Bello,

Saheed

et al. 2023

E3S Web Conf.

View full text Add to dashboard Cite

show abstract

“…In recent years the production of miniaturized products has become a global trend in various industrial clusters such as, electronics, communication, aerospace, biomedical devices, defense and automotive, which requires advanced manufacturing technologies at micron level (see e.g. [1,2]). Various challenges, such as size effect and stress concentrations at the grain boundaries, arise at the grain scale.…”

Section: Introductionmentioning

confidence: 99%

Inter-granular cracking through strain gradient crystal plasticity and cohesive zone modeling approaches

Yalçınkaya

Özdemir

Firat

2019

Theoretical and Applied Fracture Mechanics

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“…The preliminary results on this study have been presented in the conferences and related proceedings (see e.g. [44][45][46]) however a complete work on the effect of grain boundary conditions, the grain size, the sample size and the loading rate has not been published yet neither by the authors nor in the literature. It is crucial to note that the current study considers full size specimens at micron level and addresses the intrinsic and specimen size effect though a nonlocal crystal plasticity framework.…”

Section: Introductionmentioning

confidence: 99%

Micromechanical modeling of intrinsic and specimen size effects in microforming

2017

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Size effect is a crucial phenomenon in the microforming processes of metallic alloys involving only limited amount of grains. At this scale intrinsic size effect arises due to the size of the grains and the specimen/statistical size effect occurs due to the number of grains where the properties of individual grains become decisive on the mechanical behavior of the material. This paper deals with the micromechanical modeling of the size dependent plastic response of polycrystalline metallic materials at micron scale through a strain gradient crystal plasticity framework. The model is implemented into a Finite Element software as a coupled implicit user element subroutine where the plastic slip and displacement fields are taken as global variables. Uniaxial tensile tests are conducted for microstructures having different number of grains with random orientations in plane strain setting. The influence of the grain size and number on both local and macroscopic behavior of the material is investigated. The attention is focussed on the effect of the grain boundary conditions, deformation rate and the grain size on the mechanical behavior of micron sized specimens. The model is intrinsically capable of capturing both experimentally observed phenomena thanks to the incorporated internal length scale and the crystallographic orientation definition of each grain.

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Micromechanical Modelling of Size Effects in Microforming

Cited by 5 publications

References 9 publications

Response of Various Extrusion Parameters to Different Outputs: Review

Response of Various Extrusion Parameters to Different Outputs: Review

Inter-granular cracking through strain gradient crystal plasticity and cohesive zone modeling approaches

Micromechanical modeling of intrinsic and specimen size effects in microforming

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