Morphology Evolution and Probability Characteristic of γ' Phase in Single Crystal Superalloy during Creep Rafting

Zi Xu Guo; Xiao Yu Qin; Da Wei Huang; Xiao Jun Yan

doi:10.4028/www.scientific.net/KEM.827.373

Paper Titles

Damage Analysis of Thermal Barrier Coatings Subjected to a High-Velocity Impingement of a Solid Sphere
p.349

Prediction of Indentation Size Formed by a High-Velocity Impingement of a Solid Sphere Based on an Expanding Cavity Model
p.355

Damage Evaluation of TBC by Rapid Thermal Cycling Test Utilizing a Laser Irradiation
p.361

Numerical Simulation of Volcanic Ash Infiltration into Thermal Barrier Coatings
p.367

Morphology Evolution and Probability Characteristic of γ' Phase in Single Crystal Superalloy during Creep Rafting
p.373

An Approach for Predicting the Initiation of Ductile Fracture in Plane Strain Rolling
p.379

Study of the Viscoelasticity of Chopped Aramid Fiber Reinforced Rubber Composite
p.385

Crack Initiation Mechanism of Hydrogen Induced Cracking in Nickel
p.392

Two-Dimensional Stress Analysis of an Infinite Plate with Anisotropic Inclusions by BFM
p.397

HomeKey Engineering MaterialsKey Engineering Materials Vol. 827Morphology Evolution and Probability...

Morphology Evolution and Probability Characteristic of γ' Phase in Single Crystal Superalloy during Creep Rafting

Abstract:

Ni-based single crystal (SC) superalloys are widely applied in the turbine blades of advanced aero-engine due to their excellent heat resistance. Rafting is a major degradation mode of SC under creep damage. In this study, the morphology evolution and probability characteristic of shape parameters are investigated for cuboidal γ´ phase during creep rafting. Three groups of SC creep tests are carried out at 850 °C and 600 Mpa along [001] direction. Scanning electron microscope (SEM) is used to observe the microstructure of SC at four different creep times including 0 h, 8 h, 16 h and 64 h. In addition, an image processing program is developed to identify the length (normal to uniaxial stress) and width (parallel to the stress) of each γ´ phase. Two interesting findings of this investigation can be summarized as: 1) During the N-type rafting of SC, the vertical matrix channel widths are gradually decreased, and the γ phases near the vertex of the cuboidal γ´ phases disappear 2) The length, width of γ´ phases both obey lognormal distributions during creep rafting, and the standard deviations change slightly for the width, but increase significantly for the length. These above findings are of significance to multi-scale probability modeling for creep deformation and fracture.

You might also be interested in these eBooks

Advances in Fracture and Damage Mechanics XVIII

View Preview

Info:

Periodical:

Key Engineering Materials (Volume 827)

Pages:

373-378

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.827.373

Citation:

Cite this paper

Online since:

December 2019

Authors:

Zi Xu Guo, Xiao Yu Qin, Da Wei Huang, Xiao Jun Yan*

Keywords:

Creep Rafting Behavior, Microstructure Evolution, Nickel-Base Single Crystal Superalloy

Export:

RIS, BibTeX

Price:

Permissions:

Request Permissions

* - Corresponding Author

References

[1] Y.N. Fan, H.J. Shi, W.H. Qiu, Material science and Engineering A, Forum Vol. (2015).

Google Scholar

[2] B. Fedelich, G. Künecke, A. Epishin, T. Link, P. Portella, Materials Science & Engineering A , Forum Vol. 510 (2009) ,pp.273-277.

DOI: 10.1016/j.msea.2008.04.089

Google Scholar

[3] E.S. Huron, R.C. Reed, M.C. Hardy, M.J. Mills, R.E. Montero, P.D. Portella, J. Telesman, Rafting during High Temperature Deformation in a Single Crystal Superalloy: Experiments and Modeling, Forum Vol. (2012).

DOI: 10.1002/9781118516430.ch54

Google Scholar

[4] O. Paris, M. Fa¨Hrmann, E. Fa¨Hrmann, T.M. Pollock, P. Fratzl, Acta Materialia 45, Forum Vol. (1997) ,pp.1085-1097.

DOI: 10.1016/s1359-6454(96)00223-6

Google Scholar

[5] N. Tsuno, A. Sato, K. Tanaka, Advanced Materials Research, Forum Vol. 278 (2011) ,pp.19-24.

Google Scholar

[6] M.J. Mills, M.J. Mills, Mechanisms of High Temperature/Low Stress Creep of Ni-Based Superalloy Single Crystals, Forum Vol. (2009).

DOI: 10.2172/948728

Google Scholar

[7] Z.Y. Yu, X.Z. Wang, Z.F. Yue, Materials Science & Engineering A, Forum Vol. 697 (2017).

Google Scholar

[8] R.D. V.Caccuri, R.Desmorat, Acta Materialia A, Forum Vol. 158 (2018).

Google Scholar

[9] N. Ratel, G. Bruno, P. Bastie, T. Mori, Acta Materialia, Forum Vol. 54 (2006) ,pp.5087-5093.

DOI: 10.1016/j.actamat.2006.06.041

Google Scholar

[10] T. Ohashi, K. Hidaka, S. Imano, Acta Materialia, Forum Vol. 45 (1997),pp.1801-1810.

Google Scholar

[11] N.L. Leech, K.C. Barrett, G.A. Morgan, Fertility & Sterility, Forum Vol. 74 (2008).

Google Scholar