Evaluating the Induced Strain during Equal Channel Angular Processing

Stoica, G.; Liaw, Peter K.

doi:10.1002/9781118788035.ch12

Cited by 2 publications

(1 citation statement)

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“…Consequently, microstructure and texture formation is non-uniform across the billet. This has been demonstrated by the present author and coworkers 1430) in some ECAP deformed face-centered cubic (FCC) and hexagonal close-packed (HCP) metals, and also by models based on visioplasticity, 13,3034) finite element methods (FEM), both in 2-D and 3-D, 13,30,3555) and by slip line theory 56,57) providing evidences of inhomogeneous deformation during ECAP. In general, plastic deformation takes place in the PDZ the shape of which sensitively depends on factors such as die geometry (die angle and corner roundness), processing conditions (contact friction, back pressure (BP), temperature and pressing speed, ECAP route and number of passes) and plastic properties of the material itself.…”

Section: Introductionmentioning

confidence: 55%

Deformation Heterogeneities in Equal Channel Angular Pressing

Skrotzki¹

2019

Mater. Trans.

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Equal channel angular pressing (ECAP) is a severe plastic deformation (SPD) technique leading to refinement of the grain size of materials to submicron or even nano-size length scales. As a result SPD processed materials simultaneously possess high strength and moderate ductility and therefore have a high potential for technical applications. Because of this, much work has been devoted to the evolution of microstructure and texture and their relation to the mechanical properties. However, pressing materials through an angled channel is a complicated deformation process leading to deformation heterogeneities across the billet cross section manifested in gradients of microstructure and texture. Therefore, it is the aim of the present paper to give an overview focusing on the ECAP specific deformation heterogeneities and their related strength gradient in the billets produced. Based on the results reported, which are gained from experiment and simulation, some general conclusions on minimizing the deformation heterogeneities in ECAP are drawn. [

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