Investigations on the consolidation of TNM powder by admixing different elemental powders

authored by: Adrian Heymann, Julius Peddinghaus, Kai Brunotte, Bernd Arno Behrens
Abstract: In the conventional powder metallurgy (PM) process route, finished components are produced from metallic powder materials by pressing at room temperature followed by pressureless sintering in a furnace. This simple method for fast and cost-effective processing is not suitable for y-based titanium aluminides. Due to their brittleness, these cannot be compacted in the conventional way. In order to qualify this group of alloys for the PM route, a possible solution is the addition of elemental titanium or aluminum powder. In this study, the basis is commercially available pre-alloyed TiAI44-4Nb-0.7Mo-0.1B (TNM) powder with high application potential for example in the aerospace industry. Investigations are carried out to determine the influence of different admixtures of elemental powders on the compaction result and the resulting mechanical properties. The TNM powder is mixed with pure titanium and aluminum powders and pressed to a compact using graphite as tool lubricant. The results show that the admixture of elemental powders enables the consolidation of TNM powder. However, depending on the load applied, a certain minimum proportion of the respective elemental powder is necessary to produce a compact. Furthermore, a significant influence on the relative density as well as the strength of the pressed product can be observed.
Organisation(s): Institute of Metal Forming and Metal Forming Machines
Type: Conference contribution
Pages: 639-644
No. of pages: 6
Publication date: 30.06.2022
Publication status: Published
Peer reviewed: Yes
ASJC Scopus subject areas: Mechanics of Materials, Metals and Alloys, Surfaces, Coatings and Films
Electronic version(s): https://doi.org/10.37904/metal.2022.4428 (Access: Open)
: Details in the research portal "Research@Leibniz University"

BibTeX

@inproceedings{88268cf4b1404e62abb9890d4237b23d,
title = "Investigations on the consolidation of TNM powder by admixing different elemental powders",
abstract = "In the conventional powder metallurgy (PM) process route, finished components are produced from metallic powder materials by pressing at room temperature followed by pressureless sintering in a furnace. This simple method for fast and cost-effective processing is not suitable for y-based titanium aluminides. Due to their brittleness, these cannot be compacted in the conventional way. In order to qualify this group of alloys for the PM route, a possible solution is the addition of elemental titanium or aluminum powder. In this study, the basis is commercially available pre-alloyed TiAI44-4Nb-0.7Mo-0.1B (TNM) powder with high application potential for example in the aerospace industry. Investigations are carried out to determine the influence of different admixtures of elemental powders on the compaction result and the resulting mechanical properties. The TNM powder is mixed with pure titanium and aluminum powders and pressed to a compact using graphite as tool lubricant. The results show that the admixture of elemental powders enables the consolidation of TNM powder. However, depending on the load applied, a certain minimum proportion of the respective elemental powder is necessary to produce a compact. Furthermore, a significant influence on the relative density as well as the strength of the pressed product can be observed.",
keywords = "mechanical properties, Powder compacting, powder mixture, TiAl powder",
author = "Adrian Heymann and Julius Peddinghaus and Kai Brunotte and Behrens, {Bernd Arno}",
note = "Funding Information: Funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) - Project-ID 394563137 - SFB 1368. ; 31st International Conference on Metallurgy and Materials, METAL 2022 ; Conference date: 18-05-2022 Through 19-05-2022",
year = "2022",
month = jun,
day = "30",
doi = "10.37904/metal.2022.4428",
language = "English",
pages = "639--644",
booktitle = "31st International Conference on Metallurgy and Materials, METAL 2022",
publisher = "TANGER Ltd.",
}