Journal Article

PUBDB-2019-05243

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Microstructure evolution and enhanced creep property of a high Nb containing TiAl alloy with carbon addition

Song, L. (Corresponding author) ; Hu, X. ; Wang, L. ; Stark, A.Extern* ; Lazurenko, D. ; Lorenz, U. ; Lin, J. ; Pyczak, F.Extern* ; Zhang, T.

2019
ScienceDirect Amsterdam [u.a.]

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Please use a persistent id in citations: doi:10.1016/j.jallcom.2019.151649  doi:10.3204/PUBDB-2019-05243

Abstract: The microstructure evolution and carbide precipitation in a Ti-46Al-8Nb-0.7C alloy as well as its creep properties at intermediate temperatures are investigated by high-energy X-ray diffraction and electron microscopy. The alloy with a nearly fully lamellar microstructure exhibits excellent creep resistance, which could be attributed to the good microstructural stability and strengthening effects from both P- and H-carbides. It is also found that the creep parameters have different effects on the precipitation of the carbides. The overall volume fraction of the carbides shows a positive correlation with the creep temperature and time. However, the thermal stability of P-carbides in the γ grain interior decreases at a higher creep temperature. The creep stress hardly affects the precipitation and morphology development of the P-carbides. On the contrary, a higher stress can promote the H-carbide formation at the γ/α2 interfaces via α2 lath decomposition in lamellar colonies.

Note: © Elsevier B.V.

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Contributing Institute(s):

1. Experimentebetreuung PETRA III (FS-PE)
2. Zentrum für Material- und Küstenforschung (HZG)

Research Program(s):

1. 6G3 - PETRA III (POF3-622) (POF3-622)
2. FS-Proposal: I-20180328 (I-20180328) (I-20180328)

Experiment(s):

1. PETRA Beamline P07 (PETRA III)

Appears in the scientific report 2019

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Database coverage:
; ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; IF < 5 ; JCR ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Web of Science Core Collection

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