Anisotropy in Multiaxial Creep of Nickel-Based Single-Crystal Superalloy CMSX-2 : Experiments and Identification of Active Slip Systems

Ohno, Nobutada; Takeuchi, Tetsuya

doi:10.1299/jsmea1993.37.2_129

Cited by 3 publications

(1 citation statement)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Anisotropic creep may be caused either by the initial anisotropy of the material microstructure as a result of material processing or by the anisotropy induced in the course of inelastic deformation. Examples for tension-torsion creep of initially anisotropic materials are presented for a directionally solidified nickel-based superalloy in Ohno and Takeuchi (1994) and for a fiber-reinforced material in Robinson et al (2003a, b).…”

Section: Multi-axial and Stress State Effectsmentioning

confidence: 99%

Analysis of Inelastic Behavior for High Temperature Materials and Structures

Naumenko

Altenbach

2015

Advanced Structured Materials

View full text Add to dashboard Cite

This review provides a current status in modeling and analysis of structures for high-temperature applications. Basic features of inelastic behavior of heat resistant alloys are discussed. Typical responses for stationary and varying loading and temperature are presented and classified. Microstructural features and microstructural changes in the course of inelastic deformation at high temperature are discussed. The state of the art on material modeling and structural analysis in the inelastic range at high temperature is resented.Keywords Creep · Low cycle fatigue · Damage mechanics · Length scales · Temporal scales · Structural analysis IntroductionThe aim of this contribution is to give an overview of experimental and theoretical approaches to analyze the behavior of materials and structures subjected to mechanical loading and "high-temperature" environment. The definition of "hightemperature" materials and "high-temperature" structures can be related to the value of the homologous temperature, that is T /T m , where T is the absolute temperature and T m is the melting point of the considered material. Materials that can be efficiently used within the temperature range 0.3 < T /T m < 0.7 are called hightemperature materials. Examples include heat resistant steels, nickel-bases alloys, age-hardened aluminum alloys, cast iron materials and metal matrix composites. Structures that operate in the temperature range 0.3 < T /T m < 0.7 over a long period of time are called high-temperature structures. Examples include turbine

show abstract

Section: Multi-axial and Stress State Effectsmentioning

confidence: 99%

Analysis of Inelastic Behavior for High Temperature Materials and Structures

Naumenko

Altenbach

2015

Advanced Structured Materials

View full text Add to dashboard Cite

show abstract

Modelling of high-temperature mechanical behaviour of a single crystal superalloy

Pan

Shollock

McLean

1997

Proc. R. Soc. Lond. A

View full text Add to dashboard Cite

A model describing the anisotropic creep deformation of single crystal superalloys has been developed and evaluated using both a database of creep tests and validatory experiments on the alloy SRR99. A previous treatment by Ghosh et al. (1990) that considers deformation to occur by viscous shear on two families of slip systems, octahedral {111} 110 and cube {001} 110 , has been extended to allow the description of both primary and tertiary creep, and to simulated deformation under arbitrary loading conditions. A procedure is described for the analysis of the creep data to give the optimum values of the model parameters and the effectiveness of the model in both representing the database and in predicting the deformation characteristics for both complex orientations and complex loading conditions is assessed. In addition to comparison of the model predictions with measured deformation behaviour, the implications of the model for changes in the specimen shape and changes in crystal orientation resulting from asymmetric deformation are considered and compared with experimental measurements.

show abstract

Modelling the Anisotropic and Biaxial Creep Behaviour of Ni-Base Single Crystal Superalloys CMSX-4 and SRR99 at 1223K

MacLachlan¹,

Wright²,

Gunturi³

et al. 2000

Superalloys 2000 (Ninth International Symposium)

View full text Add to dashboard Cite

The use of single crystal turbine blade components has made many traditional models for creep unsuitable for application in certain loading situations. Such models generally assume deformation is isotropic. Since the introduction of single crystal components a generation of crystal plasticity or slip system models has emerged. Amongst the challenges of such models is to explain the orientation dependence of uniaxial creep behaviour and to attempt to make correlation between uniaxial and multiaxial stress states so that confidence can be'gained as to the performance of a model when it is applied to complex loading conditions. In this paper an attempt is made to address these issues. A slip system based finite element creep model has been fitted to uniaxial data at 1223 K in a range of crystallographic orientations. Based on experimental evidence the operative slip systems incorporated are the {111}<101> and {111}412> families of slip system. Analysis of the data and a consideration of the dislocation mechanisms likely to occur suggest that the significant component of the hardening matrix is latent hardening by the {111}<101> systems on the { 11 1}<112> systems, although hardening between the { 11 l} systems may also occur. The model can describe creep deformation as a function of orientation to a reasonable degree of accuracy. It is also shown to have reasonable predictive capability when used to analyse the results of thin cylinder biaxial creep tests on CMSX-4 and SRR99. The reason for this success is explained in terms of activated slip systems and the magnitude of the cumulative shear strain rate on different types of slip system as a function of orientation and stress state.Superanoys zoo0 @ited by

show abstract

Anisotropy in Multiaxial Creep of Nickel-Based Single-Crystal Superalloy CMSX-2 : Experiments and Identification of Active Slip Systems

Cited by 3 publications

References 15 publications

Analysis of Inelastic Behavior for High Temperature Materials and Structures

Analysis of Inelastic Behavior for High Temperature Materials and Structures

Modelling of high-temperature mechanical behaviour of a single crystal superalloy

Modelling the Anisotropic and Biaxial Creep Behaviour of Ni-Base Single Crystal Superalloys CMSX-4 and SRR99 at 1223K

Contact Info

Product

Resources

About