Effect of different oxide layer shares on the upsetting of titanium aluminide specimens

authored by

Sebastian Döring, Julius Peddinghaus, Kai Brunotte, Bernd Arno Behrens

Abstract

By ball milling in a low-oxygen atmosphere, it was possible to show that titanium aluminides (TiAl) can be processed into components by pressing and sintering in the same atmosphere. The properties (e.g. hardness and density) that can be realised with established processes such as field-assisted sintering (FAST) or hot isostatic pressing (HIP) were not achieved. Pores in the component are closed by forming processes, which improves the mechanical properties. In this work, powder-metallurgically processed TiAl was hot-formed in a low-oxygen atmosphere. The forging parameters and pre-consolidation were characterised with regard to their effect on the component properties. Force, hardness and porosity measurements as well as metallographic analyses were used to evaluate the process and the resulting specimens. It was found that a pre-consolidation and a higher degree of deformation lead to a lower porosity and a higher hardness.

Organisation(s)

Institute of Metal Forming and Metal Forming Machines

Type

Conference contribution

Pages

958-967

No. of pages

10

Publication date

2024

Publication status

Published

Peer reviewed

Yes

ASJC Scopus subject areas

General Materials Science

Electronic version(s)

https://doi.org/10.21741/9781644903131-105 (Access: Closed)

 

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