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In-depth comparison of an industrially extruded powder and ingot Al alloys
ID Bombač, David (Author), ID Cvahte, Peter (Author), ID Balog, Martin (Author), ID Kugler, Goran (Author), ID Terčelj, Milan (Author)

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Abstract
An industrial press was used to consolidate compacted aluminum powder with a nominal diameter in the range of 1 µm. Direct and indirect hot-extrusion processes were used, and suitable process parameters were determined from heating conditions, ram speeds and billet temperatures. For comparison, a direct-extrusion press for hot extrusion of a conventional aluminum alloy AA 1050 was used. The extruded Al powder showed better mechanical properties and showed a thermal stability of the mechanical properties after annealing treatments. To increase the theoretical density of the directly extruded Al powder, single-hit hot-compression tests were carried out. Activation energies for hot forming were calculated from hot-compression tests carried out in the temperature range 300–580 °C, at different strain rates. Processing maps were used to demonstrate safe hot-working conditions, to obtain an optimal microstructure after hot forming of extruded Al powder.

Language:English
Keywords:aluminum powder, hot extrusion, hot compression, activation energy
Work type:Article (dk_c)
Typology:1.01 - Original Scientific Article
Organization:NTF - Faculty of Natural Sciences and Engineering
Year:2020
Publication status in journal:Published
Article version:Publisher's version of article
Number of pages:18 str.
Numbering:Vol. 10, iss. 11, art. 1483
UDC:669
ISSN on article:2075-4701
DOI:10.3390/met10111483 This link opens in a new window
COBISS.SI-ID:36233219 This link opens in a new window
Publication date in RUL:17.01.2022
Views:85
Downloads:38
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Record is a part of a journal

Title:Metals
Shortened title:Metals
Publisher:MDPI
ISSN:2075-4701
COBISS.SI-ID:15976214 This link opens in a new window

Licences

License:CC BY 4.0, Creative Commons Attribution 4.0 International
Link:http://creativecommons.org/licenses/by/4.0/
Description:This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.
Licensing start date:06.11.2020

Document is financed by a project

Funder:Drugi - Drug financer ali več financerjev
Funding programme:Republic of Slovenia, Ministry of Education, Science and Sport

Funder:EC - European Commission
Funding programme:European Regional Development Fund
Project number:OP20.03531

Funder:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije (ARRS)
Project number:P2-0344
Name:Napredna metalurgija

Funder:ARRS - Agencija za raziskovalno dejavnost Republike Slovenije (ARRS)
Project number:P2-0268
Name:Geotehnologija

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