Issue 59

M.Gaci et alii, Frattura ed Integrità Strutturale, 59 (2022) 444-460; DOI: 10.3221/IGF-ESIS.59.29

transformation order for plates with criteria AGESE ( γ 0 = 0.16)

transformation order for plates with criteria ALESE ( γ 0 = 0.16)

N° plates ( α ) 65 (10°) 66 (190°) 67 (10°) 68 (190°) 69 (10°) 58 (30°) 70 (190°) 56 (240°) 30 (50°) 64 (300°) 63 (120°) 54 (60°) 71 (10°) 29 (50°) 25 (30°) 28 (240°) 89 (80°) 62 (290°) 57 (60°) 37 (80°) 74 (30°) 26 (240°) 61 (290°) 39 (80°) 90 (260°) 53 (80°) 38 (260°) 40 (260°) 27 (60°) 109(230°) 107(50°) 59 (110°) 108(50°) 72 (190°) 106(50°) 1 (160°) 52 (290°)

Z (%)

N° plates ( α )

Z (%)

N° plates ( α ) 35 (150°) 73 (10°) 47 (330°) 49 (340°) 75 (30°) 55 (240°) 50 (110°) 34 (330°) 33 (170°) 101(170°) 31 (170°) 32 (350°) 76 (30°) 24 (30°) 85 (260°) 88 (260°) 77 (210°) 22 (230°) 87 (260°) 91 (80°) 20 (240°) 11 (50°) 21 (240°) 19 (60°) 23 (60°) 78 (210°) 17 (60°) 14 (240°) 15 (50°) 79 (210°) 84 (80°) 12 (30°) 86 (80°) 16 (230°) 18 (240°)

Z (%)

N° plates ( α ) 1 (160°) 65 (10°) 67 (10°) 68 (190°) 66 (190°) 58 (30°) 30 (50°) 64 (300°) 56 (240°) 69 (10°) 63 (120°) 28 (240°) 26 (240°) 70 (190°) 25 (30°) 29 (50°) 54 (60°) 62 (290°) 74 (30°) 61 (290°) 37 (80°) 71 (10°) 27 (60°) 57 (60°) 39 (80°) 53 (80°) 108(50°) 52 (290°) 107(50°) 106(50°) 105(230°) 59 (110°) 109(230°) 87 (260°) 90 (260°) 85 (260°) 88 (260°)

Z (%)

N° plates ( α )

Z (%)

N° plates ( α ) 49 (340°) 93 (340°) 9 (160°) 10 (330°) 35 (150°) 34 (330°) 55 (240°) 31 (170°) 32 (350°) 33 (170°) 101(170°) 73 (10°) 50 (110°) 75 (30°) 24 (30°) 77 (210°) 23 (60°) 76 (30°) 19 (60°) 20 (240°) 15 (50°) 22 (230°) 80 (30°) 11 (50°) 14 (240°) 17 (60°) 86 (80°) 89 (80°) 84 (80°) 78 (210°) 16 (230°) 91 (80°) 12 (30°) 18 (240°) 79 (210°) 21 (240°)

Z (%)

0.00 40 (260°)

0.00 2 (340°)

60 (110°) 3 (160°) 92 (340°) 105 (230°) 41 (340°) 94 (160°) 96 (150°) 97 (340°) 43 (160°) 98 (160°) 110(230°) 99 (340°) 5 (160°) 44 (160°) 103 (50°) 100(160°) 81 (150°) 104(230°) 4 (340°) 45 (340°) 7 (150°) 42 (340°) 13 (60°) 46 (150°) 48 (160°) 6 (120°) 102(50°) 82 (150°) 51 (290°) 10 (330°) 36 (330°) 95 (340°) 83 (330°) 8 (150°) 93 (340°) 9 (160°)

38 (260°) 36 (330°) 104(230°) 103(50°) 72 (190°) 51 (290°) 2 (340°) 60 (110°) 92 (340°) 3 (160°) 43 (160°) 41 (340°) 94 (160°) 96 (150°) 97 (340°) 44 (160°) 98 (160°) 110(230°) 5 (160°) 99 (340°) 42 (340°) 81 (150°) 100(160°) 45 (340°) 46 (150°) 13 (60°) 4 (340°) 7 (150°) 48 (160°) 82 (150°) 6 (120°) 83 (330°) 102(50°) 47 (330°) 95 (340°) 8 (150°)

0.88

0.88

0.89

0.89

0.68

0.68

0.69

0.69 80 (30°)

1.00

1.00

Table 5: Plates transformation order under energetic criteria’s AGESE ( γ 0 = 0.16) and ALESE ( γ 0 = 0.16) The distribution of the shear stress sig12 over all the studied grain mesh (made of the formation domain of the martensitic plates and the grain boundary) is shown in Fig. 9. However, in case of an elestoplastic behavior and with the value of γ 0 = 0.16 in AMDF criterion, The first transformed platelets have been observed at the early stage of the transformation (time = 11.5), see Tab.3 (N°: 56,14,26,28,55,18,20,63,64,50,52,51), which generate the greatest shear stress in the area of martensitic plates formation. This observation is confirmed by the reported Magee [10] studies, which show that the martensitic transformation is favored by the shearing phenomenon.

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