The Influence of γ/γ′ Morphology on the Rafting and Stress Distribution of Nickel-Based Superalloys Loaded in [0 0 1] Direction

Xin Mei Wang; M.Y. Cao; S.W. Li; Z.Y. Yu; Z.F. Yue

doi:10.4028/www.scientific.net/MSF.895.14

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HomeMaterials Science ForumMaterials Science Forum Vol. 895The Influence of γ/γ′ Morphology on the Rafting...

The Influence of γ/γ′ Morphology on the Rafting and Stress Distribution of Nickel-Based Superalloys Loaded in [0 0 1] Direction

Abstract:

Two kinds of representative volume elements (RVEs) are introduced to represent the experimental γ/γ′ morphology to study the influences of microstructures on the creep behavior of [0 0 1]-oriented single crystal nickel-based superalloys under tensile loading. One RVE (RVE1) is consisted with one cuboidal γ′ phase surrounded by γ phase. The other (RVE2) is constructed by two cuboidal γ′ phases and one rectangle γ′ phase. A raft criterion is implemented into a user subroutine to predict the rafting type. The misfit stress is considered by different thermal expansion coefficients of the two phases. The rafting type is correctly predicted. The evolutions of the stresses distributions are discussed.

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Periodical:

Materials Science Forum (Volume 895)

Pages:

14-19

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.895.14

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Online since:

March 2017

Authors:

Xin Mei Wang*, M.Y. Cao, S.W. Li, Z.Y. Yu, Z.F. Yue

Keywords:

Creep, Rafting, Representative Volume Element, Single Crystal Superalloys

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