Issue 78

V. I. Kolesikov et alii, Fracture and Structural Integrity, 78 (2026) 220-232; DOI: 10.3221/IGF-ESIS.78.13

RVE of hard/hard composite “40CrNiMo/40CrNiMo/40CrNiMo” Fig. 2 presents the results of CP simulations for the RVE of hard/hard composite “40CrNiMo/40CrNiMo/40CrNiMo” through various parameter maps: a) a crystal morphology; b) magnitude of ത (tensor trace); c) von Mises equivalent stress ( ); d) von Mises equivalent strain ( ); e) plastic shear magnitude ( , Euclidean norm of the vector); f) critical resolved share stress magnitude ( , Euclidean norm of the vector); g) elastic deformation gradient magnitude ( , tensor trace); and h) magnitude of the plastic deformation gradient ( , tensor trace). It is seen that the composite RVE consists of layers with different microstructures, all belonging to the same 40CrNiMo phase. Consequently, a localization of plastic deformation is evident at the interfaces between columnar and equiaxial microstructures. This phenomenon is shown in greater detail in Figs. 3 a-h for the interfacial contact between columnar and equiaxial microstructure regions in the composite RVE.

a)

b)

d)

c)

40CrNiMo

ε vM F p

σ vM , Pa

40CrNiMo

P , Pa

40CrNiMo

f)

e)

h)

g)

γ a

F e

τ c a , Pa

Figure 2. Simulated CP fields within the RVE of hard/hard composite “40CrNiMo/40CrNiMo/40CrNiMo” with columnar and equiaxial microstructures at t =144 s .

a)

b)

d)

c)

40CrNiMo top of the middle layer

ε vM ε vM

τ c a , Pa τ c a , Pa

σ vM , Pa σ vM , Pa

e)

f)

h)

g)

40CrNiMo bottom of the top layer

Figure 3: Slices of the simulated CP fields for the RVE of hard/hard composite “40CrNiMo/40CrNiMo/40CrNiMo” at the interface of columnar and equiaxial microstructures at t =144 s. a) a crystal morphology; b) magnitude of ത ; c) ; d) ; e) ; f) ; g) ; and h) . See text for more detail, definitions and abbreviations.

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