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s-1), while in the case of higher strain rate (10-50 s-1), DRX occurred extensively both at twins and grain boundaries at all temperature range, especially at temperature lower than 350 °C, which... of 10-50 s-1 and in the temperature range of 250-350 °C was desirable for ZK60 alloy. Twin induced DRX during high strain rate compression included three steps. Firstly, twins with high dislocation......
in magnesium alloy by means of orientation mapping[J]. The Chinese Journal of Nonferrous Metals, 2004, 14(1): 105-111. [19] KADIRI H E, BARRETT C D, WANG J, TOME C N. Why are twins profuse in magnesium?[J...;and . There have great differences between the morphology of two kinds of common twins. tensile twins mostly form in non-basal plane oriented grain. Once the twins have formed, it will expand rapidly......
of stage II, and the dislocation density was increased and the planar arrangement configuration was partially destroyed at a strain of 0.36 located in stage III. It was unexpected that deformation twins... the deformation twins were absent in Ni–Cr-based alloy Inconel 625 even when the strain was as high as 0.65. It was deemed that the low level of solution strengthening favored the deformation of matrix......
) exhibiting superior properties than their twin-free counterparts allows an efficient way to be harder. From this point of view, the borides, carbides and nitrides may be stronger by introducing twins, whose formation tendency can be measured using stacking fault energies(SFEs). The lower the SFEs, the easier the formation of twins. In the present study, by means of first-principles calculations, we......
, which took place in 200-300°C, induced by cracked chain-shaped Al2 Ca phases, contraction twins, intersections of double twins, intersections of double twins and grain boundaries and non-basal slips......
is the dominant deformation twin at low strains loaded along the c-axis, and the <> tensile twinning generates as the second twin in <> twins. The selection of twinning modes is governed by Schmid factor (SF) due to the calculating of SF and the EBSD simulating of twinning distribution. The evolution of texture during rolling affected by twins with increase of the strain was explained. Key......
interior. A mass of dislocations and dislocation cells form during plastic deformation while some twins form simultaneously. After twining, the grain orientations change, and then they will slip on suitable condition. This process leads the formation of dislocations in twins and deformation of twins. The recovery and recrystallization reduce during twin-roll casting because of the plastic deformation......
, Al3 Ni, and Cu3 Al precipitated phases in the matrix alloy rises sharply. At the same time, there are largedimensional deformed twins existing in local regions and stacking faults existing inside the twins.关键词:......
deformation mechanism in the early stage of deformation. Deformation twins started to form when the rolling reduction was larger than 38.9%; both the dislocation density and the number of twins increased......
of the flow stressstrain curves, constitutive equation, and processing map. The stress exponent and apparent activation energy were calculated to be 5.821 and 173.96 k J/mol, respectively. Deformation twins... and decreasing strain rate, the twins disappeared and the degree of dynamic recrystallization increased. The alloy was completely dynamically recrystallized at 420 ℃ and 0.002 s-1, with a homogenous......