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HomeMaterials Science ForumMaterials Science Forum Vol. 1027Influence of Load Interaction between Creep and...

Influence of Load Interaction between Creep and TMF on the Life of Single Crystal Nickel-based Superalloy

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Abstract:

Experimental investigation on the influence of load interaction on the life of Single Crystal Nickel-based Superalloy is conducted. Three kinds of load spectrums considering single and coupled failure mode are designed. Life tests are carried out under creep, thermo-mechanical fatigue (TMF), and creep-TMF interaction loading. The test results show that test lives, under the creep-TMF interaction loading, are lower than the life predictions given by the linear damage accumulation (LDA) rule, indicating that the load coupling can accelerate the damage evolution process. The microstructure of fractured specimens shows that under the creep-TMF interaction loading, rafting cause more dislocations to accumulate in the at γ/γ′ phase boundary, which could be the evidence of life decrease.

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Materials Science and Manufacturing Engineering

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Periodical:

Materials Science Forum (Volume 1027)

Pages:

99-106

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.1027.99

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Online since:

April 2021

Authors:

Zi Yuan Song*

Keywords:

Creep-TMF Interaction, Damage Accumulation, Damage Mechanism, Single Crystal Superalloy

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© 2021 Trans Tech Publications Ltd. All Rights Reserved

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