B2-structured Fe3Al alloy manufactured by laser powder bed fusion: Processing, microstructure and mechanical performanceShow others and affiliations
2023 (English)In: Intermetallics (Barking), ISSN 0966-9795, E-ISSN 1879-0216, Vol. 156, article id 107849Article in journal (Refereed) Published
Abstract [en]
Prealloyed Fe3Al was successfully manufactured by laser powder bed fusion. The best set of process parameters led to parts with a relative density of 99.5 %, a surface roughness, Sa, of 31.5 ± 5.6 μm and a hardness of 319 ± 14 HV0.1. Its microstructure as well as its mechanical properties at room and high temperatures were analyzed. The results of the chemical composition showed minor variations in aluminum content oscillating between 21 and 28 at.% along the melt pool. Additionally, elongated grains were observed to grow parallel to the building direction, as well as the development of a weak 001 texture along the building direction. The mechanical properties were influenced by the temperature. Compression tests showed a loss in strength with the increase in temperature, from a yield strength of 621 ± 40 MPa at room temperature to 89 ± 20 MPa at 650 °C. Reciprocating sliding wear tests showed that fragmentation of the intermetallic at room temperature occurs, whereas plastic deformation dominated at higher temperatures. For all temperatures, tribochemical wear was also present due to the oxidation of wear debris.
Place, publisher, year, edition, pages
Elsevier, 2023. Vol. 156, article id 107849
Keywords [en]
Aluminum alloys, Binary alloys, Compression testing, Ductile fracture, Iron alloys, Surface roughness, Textures, Wear of materials, Laser powders, Laser process, Laser processing and cladding, Mechanical performance, Microstructure performance, Powder bed, Prealloyed, Process parameters, Processing performance, Relative density, Intermetallics
National Category
Manufacturing, Surface and Joining Technology Other Materials Engineering Other Mechanical Engineering
Research subject
Materials Engineering; Mechanical Engineering
Identifiers
URN: urn:nbn:se:kau:diva-93854DOI: 10.1016/j.intermet.2023.107849ISI: 000954396000001Scopus ID: 2-s2.0-85148007172OAI: oai:DiVA.org:kau-93854DiVA, id: diva2:1741708
2023-03-062023-03-062025-02-14Bibliographically approved