Plastic strain-induced rafting of γ′ precipitates in Ni superalloys: Elasticity analysis

Ratel, N.; Bruno, Giovanni; Bastie, P.; Mori, T.

doi:10.1016/j.actamat.2006.06.041

Cited by 42 publications

(28 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The second step of the procedure is to solve the viscoplastic kinetic equations. To do so, we compute the resolved shear stress on each slip system τ s (r) using (20). Then the new values of the plastic fields γ s and α s (r) are computed, with an Euler scheme, using the kinetic Eqs.…”

Section: Phase Field Modelmentioning

confidence: 99%

See 1 more Smart Citation

Phase field methods: Microstructures, mechanical properties and complexity

Finel

Bouar

Gaubert

et al. 2010

Comptes Rendus. Physique

View full text Add to dashboard Cite

Section: Phase Field Modelmentioning

confidence: 99%

“…In the mean time, several authors underline that plastic activity plays an important role in this morphological evolution [14][15][16][17]. A great number of models has been developed in order to predict raft orientation, first within a simple elastic frame [18,19] and more recently adding the plastic strain influence [20].…”

Section: Introductionmentioning

confidence: 99%

Phase field methods: Microstructures, mechanical properties and complexity

Finel

Bouar

Gaubert

et al. 2010

Comptes Rendus. Physique

View full text Add to dashboard Cite

“…In this study, the plastic deformation observed in creep experiments are introduced into the matrix with the misfit strain by " p along the [001] tensile stress. 11) In this case, the lateral directions undergo a plastic strain of À" p =2 and hence the misfit strain of the the 0 phase induced by the creep deformation is expressed as…”

Section: Calculation Modelmentioning

confidence: 99%

Phase-Field Simulation on the Formation and Collapse Processes of the Rafted Structure in Ni-Based Superalloys

et al. 2008

View full text Add to dashboard Cite

In Ni-based superalloys, the rafted structure is known to form in the early stage of creep and to get into wavy morphology in the final stage of creep at elevated temperatures. This rafting phenomenon is essentially related to the anisotropic relaxation of the lattice misfit between the and 0 phases due to the creep strain under the external stress. In this study, in order to simulate comprehensively from the formation to collapse processes of the rafted structure by the phase-field method, a new idea that the anisotropy increases with simulation time is employed in the calculation of the elastic strain energy in alloy. This idea corresponds to the phenomenon that creep strain increases with creep time. The results are in good agreement with the microstructural change observed in practical Ni-based alloys.

show abstract

“…Thus the evolution of shape changes during precipitate growth in an elastically anisotropic, infinite matrix has been investigated for different two-phase systems [e.g. nickel-based alloys (Wang & Khachaturyan, 1995;Ratel et al, 2006Ratel et al, , 2010Ardell, 2014) and piezoelectric piezomagnetic composites (Ni & Khachaturyan, 2007)]. …”

Section: Introduction: Micro-and Macrostrains; Coherent and Incoherenmentioning

confidence: 99%

Misfit-induced changes of lattice parameters in two-phase systems: coherent/incoherent precipitates in a matrix

et al. 2016

View full text Add to dashboard Cite

Elastic accommodation of precipitation-induced or thermally induced misfit leads to lattice-parameter changes in crystalline multi-phase systems. Formulae for calculation of such misfit-induced lattice-parameter changes are presented for the aggregate (matrix + second-phase particles) and for the individual matrix and second phase, recognizing the occurrence of either coherent or incoherent diffraction by the matrix and second-phase particles. An overview and an (re)interpretation on the above basis is presented of published lattice-parameter data, obtained by X-ray diffraction analyses of aggregates of matrix plus secondphase particles. Examples for three types of systems consisting of a matrix with misfitting second-phase particles are dealt with, which differ in the origin of the misfit (precipitation or thermally induced) and in the type of diffraction (coherent or incoherent diffraction of matrix plus second-phase particles). The experimental data are shown to be in good to very good agreement with predictions according to the current treatment.

show abstract

Plastic strain-induced rafting of γ′ precipitates in Ni superalloys: Elasticity analysis

Cited by 42 publications

References 21 publications

Phase field methods: Microstructures, mechanical properties and complexity

Phase field methods: Microstructures, mechanical properties and complexity

Phase-Field Simulation on the Formation and Collapse Processes of the Rafted Structure in Ni-Based Superalloys

Misfit-induced changes of lattice parameters in two-phase systems: coherent/incoherent precipitates in a matrix

Contact Info

Product

Resources

About