Effects of Section Size on the Stress Rupture Lives of the Machined Thin-Walled Slab Specimen of DD6 Single Crystal Superalloy at 980 °C/250 MPa

Liang Yang; Jia Rong Li

doi:10.4028/www.scientific.net/AMR.816-817.90

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 816-817Effects of Section Size on the Stress Rupture...

Effects of Section Size on the Stress Rupture Lives of the Machined Thin-Walled Slab Specimen of DD6 Single Crystal Superalloy at 980 °C/250 MPa

Abstract:

The effects of section size on the stress rupture lives of DD6 single crystal superalloy at 980 °C/250 MPa were investigated adopting machined thin-walled slab specimen. Stress rupture fractograph was analyzed. The results show that stress rupture lives of machined thin-walled slab specimen decline slightly with the reduction of section size at 980 °C/250 MPa, and stress rupture lives of thin-walled specimen are slightly lower compared with that of 5 mm in diameter standard cylindrically specimen, however, the stress rupture lives of thin-walled specimen are still about 200 hours. The decrease in effective loading area caused by oxidation is the main factor for the reduction of thin-walled stress rupture lives.

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Periodical:

Advanced Materials Research (Volumes 816-817)

Pages:

90-95

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.816-817.90

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Online since:

September 2013

Authors:

Liang Yang, Jia Rong Li

Keywords:

DD6, Oxidation, Single Crystal Superalloy, Stress Rupture Lives, Thin-Walled

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