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Increased wear and oxidation resistance of titanium aluminide alloys by laser cladding
Publikationstyp
Journal Article
Date Issued
2011-07-04
Sprache
English
Author(s)
First published in
Number in series
278
Start Page
515
End Page
520
Citation
Advanced Materials Research 278: 515-520 (2011-07-04)
Publisher DOI
Scopus ID
Publisher
Trans Tech Publications Ltd.
A process layout for laser cladding of layers on substrates of titanium aluminides using state-of-theart and modified (additions of Si and TiB2) TiAl alloys is presented. The process involves a preheating of the samples to reduce thermal stresses and cladding in an inert gas atmosphere with an oxygen content lower than 30 ppm. These conditions lead to crack free layers and low surface oxidation. Microstructure and hardness of the layers are investigated. The abrasive wear resistance of the cladded layers in comparison to the base material is tested with promising results. Finally results of the oxidation behavior are shown and prove the increased performance of modified TiAl layers in comparison to the base material.
Subjects
Laser cladding
Oxidation resistance
Titanium aluminide
Wear resistance
DDC Class
530: Physik