Abstract
In order to get the brittle temperature range for internal crack, the solidification phase transformation model is established and LIT and ZDT are calculated. Then the fully coupled thermo-mechanical finite element models are developed using the commercial software ABAQUS to investigate stress and strain states in the brittle temperature range of the chamfer billets during soft reduction. The relation between chamfer angle and maximal principal stress, as well as equivalent plastic strain is analyzed, and the influence of chamfer angle of billet on the internal crack is studied. The results indicate that the maximal principal stress and the tensile stress decrease with the increase of chamfer angle. Reducing the soft reduction can lower the stress and strain in the brittle temperature range. It can be obtained that the larger reduction effect and lesser internal crack risk by adjusting the chamfer angle of the billet.
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