Optimization of die design for extrusion of 6xxx series aluminum alloys through finite element analysis: a critical review

E Giarmas, D Tzetzis - The International Journal of Advanced …, 2022 - Springer
This paper presents an overview of the recent advances in optimization of die design
through finite element analysis for aluminum alloys of 6xxx series. The die design and …

[HTML][HTML] Charge weld evolution in hollow aluminum extrusion: Experiments and modeling

EC Sariyarlioglu, M Negozio, T Welo, J Ma - CIRP Journal of Manufacturing …, 2024 - Elsevier
Charge welds occur in billet-to-billet extrusion processes due to the transition between
successive billets. The material in this transition zone is typically characterized by …

Finite element model prediction of charge weld behaviour in AA6082 and AA6063 extruded profiles

M Negozio, R Pelaccia, L Donati, B Reggiani… - Journal of Materials …, 2021 - Springer
Charge welds are unavoidable defects of the continuous extrusion process whose extension
needs to be accurately predicted in order to avoid profile mechanical failures or to minimize …

FEM validation of front end and back end defects evolution in AA6063 and AA6082 aluminum alloys profiles

M Negozio, R Pelaccia, L Donati, B Reggiani… - Procedia …, 2020 - Elsevier
The reduction of scraps related to back end defects (ie billet skin contamination) and front
end defects (ie charge welds) is gaining nowadays an increasing industrial interest in order …

Scrap assessment in direct extrusion

B Reggiani, T Pinter, L Donati - The International Journal of Advanced …, 2020 - Springer
The continuous direct extrusion is an economic and efficient process to manufacture high-
quality aluminium profiles. However, because of multiple billets processing, transient defects …

Continuous hot extrusion with a stationary valve

J Gebhard, A Schulze, T Clausmeyer, AE Tekkaya - CIRP Annals, 2023 - Elsevier
The novel continuous extrusion process was invented to enable constant material flow at the
die exit during the dead cycle time and to reduce scrap. The process is a combination of …

Extrusion of light and ultralight alloys with liquid nitrogen conformal cooled dies: process analysis and simulation

R Pelaccia, M Negozio, L Donati, B Reggiani… - Journal of Materials …, 2021 - Springer
The die cooling by means of liquid nitrogen is a widely adopted industrial practice used to
increase the production rate in the hot extrusion process of light alloys. The development of …

Phase Field Method for the Assessment of the New-Old Billet Material Interaction during Continuous Extrusion Using COMSOL Multiphysics

S Di Donato, R Pelaccia, M Negozio - Journal of Materials Engineering …, 2024 - Springer
During the hot extrusion process of metals, billets are continuously loaded into the press and
joined together under high hydrostatic pressure, forming a single extruded profile …

Comparison of experimental methods to evaluate seam welds quality in extruded profiles

B Reggiani, L Donati - Transactions of Nonferrous Metals Society of China, 2020 - Elsevier
The wedge and bulge expansion tests were compared in the assessment of the seam welds
strength in a tubular profile extruded at two ram speeds. In the wedge test, the expansion …

Effect of Die Design on Charge Welds in Aluminium Extrusion

EC Sariyarlioglu, M Negozio, J Ma, T Welo… - … Conference on the …, 2023 - Springer
Aluminium extrusions are used in more and more applications in different industrial fields,
due to their properties and productivity. However, in-process scrap produced in aluminium …