Influence of solidification conditions on the castability of nickel-base superalloy IN792

Beitrag in einer Fachzeitschrift
(Originalarbeit)


Details zur Publikation

Autor(en): Zhou Y, Volek A, Singer R
Zeitschrift: Metallurgical and Materials Transactions A-Physical Metallurgy and Materials Science
Jahr der Veröffentlichung: 2005
Band: 36
Heftnummer: 3
Seitenbereich: 651-656
ISSN: 1073-5623
Sprache: Englisch


Abstract


The effect of withdrawal rate on hot tearing or solidification cracking during directional solidification (DS) was explored. High withdrawal rates were found to reduce the hot tearing tendency. There is a general refinement of the microstructure when the withdrawal rate is increased. First, the dendrite arm spacing appears smaller. Second, the columnar grain size is reduced. Third, the remaining liquid is finely dispersed and increasingly discontinuous. Finally, a more uniform distribution of strain is obtained because of the presence of more grain boundaries, and grain boundary cohesion becomes stronger due to the elimination of continuous liquid films. The reduced hot tearing susceptibility is attributed to the uniform distribution of strain and stronger grain boundary cohesion.



FAU-Autoren / FAU-Herausgeber

Singer, Robert Prof. Dr.-Ing.
Lehrstuhl für Werkstoffwissenschaften (Werkstoffkunde und Technologie der Metalle)


Zitierweisen

APA:
Zhou, Y., Volek, A., & Singer, R. (2005). Influence of solidification conditions on the castability of nickel-base superalloy IN792. Metallurgical and Materials Transactions A-Physical Metallurgy and Materials Science, 36(3), 651-656.

MLA:
Zhou, Yizhou, Andreas Volek, and Robert Singer. "Influence of solidification conditions on the castability of nickel-base superalloy IN792." Metallurgical and Materials Transactions A-Physical Metallurgy and Materials Science 36.3 (2005): 651-656.

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Zuletzt aktualisiert 2018-10-08 um 15:55