Christon elastic fields in formation of bainitic ferrite lath structure

Elastic fields of (774)γ[4 4 $\overline {14} $ ]γ crystons and the formation of a lath structure of bainitic ferrite

“…3 replace sites and the condition for the choice at h < ᐍ 3. DISCUSSION The results considered in [9] and in this work show that the cryston carriers of shear of the type at h < ᐍ and h > ᐍ are not equivalent from the view point of creating conditions for the reproduction of self similar carriers that play the role of DNCs. If both variants of the cryston DNCs were equal in the process of the formation of a bainitic macroplate, then the set of orientations of the lath habits in the macroplate would include at least the habits of the (hh ± ᐍ) γ type at h < ᐍ and h > ᐍ.…”

“…Strictly speaking, as was shown in [9], for the car rier of shear of the (558) γ type with tanψ = 0.15 one of the maxima of δ(θ) at θ = 126° corresponds to the habit of the bainitic ferrite. Therefore, to check the completeness of the set of orientations of the expected habits in this work, it is possible to start from the calculation of the field of the [4 4 14] γ cryston.…”

“…It has been shown in [9] that the results of calcula tions for the case of Λ 2 ||[558] γ , the direction of which is close to The aim of this work is to study (using the same scheme) the elastic field of a DNC at Λ 2 ||[774] γ , which corresponds to the cryston model of shear that should accompany the appearance of a lath with a habit (774) γ related to the second component of the bimodal com position. This problem is of large importance for determining the mechanism of the formation of an additional component of the lath composition of the bainite macroplate.…”

“…Figure 3 shows the elastic fields of a cryston carrier of shear with the above indicated parameters of the basic loop for the case of ten loops at R = 1500. In accordance with [10], as the model set of elastic mod uli, we chose С L = 0.2508, C' = 0.0271, and C 44 = 0.1034 TPa for the Fe-31.5Ni alloy at a temperature T = 673 K. Compared to the case of the carrier of shear (558) γ considered in [9], the transition to the shear (774) γ (apart from the interest in the consideration of a variant > 1) requires that we increased tanψ. In accordance with the results of [6], we assume that tanψ = 0.22.…”

The rules for selection of dislocation nucleation centers of martensite in the dynamic theory of reconstructive martensitic transformations

“…Переход от отдельных петель к их ансамблям, описывающим кристонные носители сдвига [9][10][11], вносит дополнительное разнообразие в спектр возможных ДЦЗ, включая в сферу анализа не только мартенсит, возникающий спонтанно (при охлаждении), но и мартенсит деформации.…”