Modelling and simulation of dynamic recrystallization (DRX) in OFHC copper at very high strain rates
Paper i proceeding, 2017

At high strain rates, deformation processes are essentially adiabatic and if the plastic work is large enough dynamic recrystallization can occur. In this work, an examination on microstructure evolution of OFHC copper in Dynamic Tensile Extrusion (DTE) test, performed at 400 m/s, was carried out. EBSD investigations, along the center line of the fragment remaining in the extrusion die, showed a progressive elongation of the grains, and an accompanying development of a strong < 001 > + < 111 > dual fiber texture. Discontinuous dynamic recrystallization (DRX) occurred at larger strains, and it was showed that nucleation occurred during straining. A criterion for DRX to occur, based on the evolution of Zener-Hollomon parameter during the dynamic deformation process, is proposed. Finally, DTE test was simulated using the modified Rusinek-Klepaczko constitutive model incorporating a model for the prediction of DRX initiation.

Författare

Gabriel Testa

Universita di Cassino e del Lazio Meridionale

Nicola Bonora

Universita di Cassino e del Lazio Meridionale

Andrew Ruggiero

Universita di Cassino e del Lazio Meridionale

G. Iannitti

TECHDYN Engineering

Italo Peresechino

Universita di Cassino e del Lazio Meridionale

Magnus Hörnqvist

Chalmers, Fysik, Materialens mikrostruktur

Nooshin Mortazavi Seyedeh

Chalmers, Fysik, Materialens mikrostruktur

AIP Conference Proceedings

0094-243X (ISSN) 1551-7616 (eISSN)

Article number 100034- 100034

Ämneskategorier

Maskinteknik

Annan materialteknik

Styrkeområden

Materialvetenskap

DOI

10.1063/1.4971659

ISBN

978-073541457-0

Mer information

Senast uppdaterat

2018-10-15