An innovative way to fabricate γ-TiAl blades and their failure mechanisms under thermal shock
An innovative way to fabricate γ-TiAl blades and their failure mechanisms under thermal shock
The near-net-shape γ-TiAl blades were built by selective electron beam melting. As-fabricated material exhibits a good combination of microstructure homogeneity, tensile properties and thermal shock resistance at 700 °C owing to the optimised process parameters. The consistent and reliable approach to achieve this manufacturing success is elaborated. By performing thermal shock experiments at 900 °C, a new cracking mechanism has been identified. Through the post-mortem examinations, we reveal that such failure mode is most likely associated with the layer-by-layer strategy. Oxidation in conjunction with the surface topology is the underlying mechanism.
Gao, R.
c492ea97-d834-4617-a7e0-70fd9619c019
Peng, H.
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Guo, H.
e4443178-ab9c-47e6-b239-c7bd592cd39c
Chen, B.
be54a9a8-da2a-4e6f-ae0e-0b076be87daf
23 June 2021
Gao, R.
c492ea97-d834-4617-a7e0-70fd9619c019
Peng, H.
d41e927f-6326-4d5d-a323-979a0c1c3dcd
Guo, H.
e4443178-ab9c-47e6-b239-c7bd592cd39c
Chen, B.
be54a9a8-da2a-4e6f-ae0e-0b076be87daf
Gao, R., Peng, H., Guo, H. and Chen, B.
(2021)
An innovative way to fabricate γ-TiAl blades and their failure mechanisms under thermal shock.
Scripta Materialia, 203, [114092].
(doi:10.1016/j.scriptamat.2021.114092).
Abstract
The near-net-shape γ-TiAl blades were built by selective electron beam melting. As-fabricated material exhibits a good combination of microstructure homogeneity, tensile properties and thermal shock resistance at 700 °C owing to the optimised process parameters. The consistent and reliable approach to achieve this manufacturing success is elaborated. By performing thermal shock experiments at 900 °C, a new cracking mechanism has been identified. Through the post-mortem examinations, we reveal that such failure mode is most likely associated with the layer-by-layer strategy. Oxidation in conjunction with the surface topology is the underlying mechanism.
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Accepted/In Press date: 13 June 2021
e-pub ahead of print date: 23 June 2021
Published date: 23 June 2021
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Local EPrints ID: 489861
URI: http://eprints.soton.ac.uk/id/eprint/489861
ISSN: 1359-6462
PURE UUID: b758707d-4fcf-4ee8-b733-b7143e4bb643
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Date deposited: 03 May 2024 16:59
Last modified: 04 May 2024 02:09
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Author:
R. Gao
Author:
H. Peng
Author:
H. Guo
Author:
B. Chen
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