CaltechAUTHORS
  A Caltech Library Service

A microstructure-sensitive constitutive modeling of the inelastic behavior of single crystal nickel-based superalloys at very high temperature

le Graverend, J.-B. and Cormier, J. and Gallerneau, F. and Villechaise, P. and Kruch, S. and Mendez, J. (2014) A microstructure-sensitive constitutive modeling of the inelastic behavior of single crystal nickel-based superalloys at very high temperature. International Journal of Plasticity, 59 . pp. 55-83. ISSN 0749-6419. https://resolver.caltech.edu/CaltechAUTHORS:20140724-125441461

Full text is not posted in this repository. Consult Related URLs below.

Use this Persistent URL to link to this item: https://resolver.caltech.edu/CaltechAUTHORS:20140724-125441461

Abstract

The prediction of the viscoplastic behavior of nickel-based single crystal superalloys remains a challenging issue due to the complex loadings encountered in aeronautical engine components such as high pressure turbine blades. Under particular in-service conditions, these materials may experience temperature cycles which promote the dissolution of the strengthening γ′ phase of the material on (over)heating, and subsequent precipitation on cooling, leading to a transient viscoplastic behavior. Within this context, a model was recently developed by Cormier and Cailletaud (2010) to fulfill the effects of fast microstructure evolutions occurring upon high temperature non-isothermal loadings. New internal variables were introduced in the crystal plasticity framework to take into account microstructure evolutions such as γ′ dissolution/precipitation and dislocation recovery processes which are known to control the creep behavior and life. Nevertheless, this model did not consider the γ′ directional coarsening, one of the main microstructural evolutions occurring specifically at high temperature. In addition, no kinematic hardening was considered to describe the mechanical behavior, leading to a poor description of cyclic loadings. This paper details the development of a new model by introducing new internal variables for both modeling the γ′ directional coarsening and the evolutions of isotropic and kinematic hardening under complex loading paths. This model was calibrated using monotonous and cyclic experiments performed on [0 0 1] oriented single-crystal samples and both under isothermal and non-isothermal conditions. Thereby, it is able to predict microstructural evolutions for complex thermal and mechanical loadings as well as internal stress evolutions whatever the thermomechanical history. The model efficiency was highlighted by comparing FEM simulation and experimental results of a non-isothermal creep test on a notched sample (i.e. under complex mechanical stress state).


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1016/j.ijplas.2014.03.004DOIArticle
http://www.sciencedirect.com/science/article/pii/S0749641914000473PublisherArticle
Additional Information:© 2014 Elsevier Ltd. Received 6 December 2013; Received in final revised form 6 March 2014; Available online 19 March 2014. The authors are particularly grateful to Turbomeca – SAFRAN group for providing the material and to the French Ministry of Defense for its financial support. This work was conducted under the French program ‘‘PRC Structures Chaudes’’ involving Snecma-SAFRAN group, Turbomeca-SAFRAN group, ONERA and CNRS laboratories (Mines Paris Tech, Institut Pprime-ENSMA, LMT-Cachan, LMS-X, CIRIMAT-ENSIACET and CEAT). J.-B. le Graverend is also grateful to D. Pacou, V. Bonnand and R. Degeilh for stimulating discussions. J. Cormier and J. Mendez gratefully acknowledge Turbomeca – SAFRAN group for a continuous collaboration over 10 years, as well as Dr. Z. Hervier (Materials Department at Turbomeca) and Dr. E. Ostoja-Kuczynski (Method Department at Turbomeca) for their continuous interest in this work.
Funders:
Funding AgencyGrant Number
French Ministry of DefenseUNSPECIFIED
Subject Keywords:Nickel base single crystal superalloy; Non-isothermal loadings; Microstructure evolutions; gamma ' Rafting; Crystal plasticity model; FEM simulation; Creep
Record Number:CaltechAUTHORS:20140724-125441461
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20140724-125441461
Official Citation:le Graverend, J. B., Cormier, J., Gallerneau, F., Villechaise, P., Kruch, S., & Mendez, J. (2014). A microstructure-sensitive constitutive modeling of the inelastic behavior of single crystal nickel-based superalloys at very high temperature. International Journal of Plasticity, 59(0), 55-83. doi: http://dx.doi.org/10.1016/j.ijplas.2014.03.004
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:47466
Collection:CaltechAUTHORS
Deposited By: Joanne McCole
Deposited On:24 Jul 2014 22:09
Last Modified:03 Oct 2019 06:54

Repository Staff Only: item control page