J 2021

A New Method of Predicting the Structural and Mechanical Change of Materials during Extrusion by the Method of Multiple Plastic Deformations

HARNIČÁROVÁ, Marta; Jan VALÍČEK; Milena KUŠNEROVÁ; Zuzana PALKOVÁ; Ivan KOPAL et. al.

Basic information

Original name

A New Method of Predicting the Structural and Mechanical Change of Materials during Extrusion by the Method of Multiple Plastic Deformations

Authors

HARNIČÁROVÁ, Marta (203 Czech Republic, guarantor, belonging to the institution); Jan VALÍČEK (203 Czech Republic, belonging to the institution); Milena KUŠNEROVÁ (203 Czech Republic, belonging to the institution); Zuzana PALKOVÁ (703 Slovakia, belonging to the institution); Ivan KOPAL; Cristina BORZAN; Milan KADNÁR and Stanislav PAULOVIČ

Edition

Materials, Basel, Switzerland, MDPI, 2021, 1996-1944

Other information

Language

English

Type of outcome

Article in a journal

Field of Study

20501 Materials engineering

Country of publisher

Switzerland

Confidentiality degree

is not subject to a state or trade secret

References:

Impact factor

Impact factor: 3.748

RIV identification code

RIV/75081431:_____/21:00002097

Organization unit

Institute of Technology and Business in České Budějovice

EID Scopus

2-s2.0-85106741810

Keywords in English

welding; distortion; stamping; model; prediction

Tags

Changed: 25/6/2021 08:49, Mgr. Nikola Petříková

Abstract

V originále

"The formulation of the Hall–Petch relationship in the early 1950s has raised immense interest in studying the influence of the grain size of solid materials on their properties. Grain refinement can be achieved through extreme deformation. In the presented study, Equal-Channel Angular Pressing (ECAP) was successfully applied to produce an ultrafine-grained microstructure in a pure commercial Cu of 99.9 wt%. Samples were processed by ECAP at 21 ◦C for six passes via route A. A new equation of equilibrium that allows the exact determination of the number of extrusions and other technological parameters required to achieve the desired final grain size has been developed. The presented research also deals, in a relatively detailed and comparative way, with the use of ultrasound. In this context, a very close correlation between the process functions of extrusion and the speed of longitudinal ultrasonic waves was confirmed. "

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