malaya kumar Debta - Academia.edu (original) (raw)
Uploads
Papers by malaya kumar Debta
IOP conference series, Mar 1, 2018
The evolution of texture in commercially pure (CP) titanium during uniaxial tension and compressi... more The evolution of texture in commercially pure (CP) titanium during uniaxial tension and compression through VPSC (Visco-plastic self-consistent) simulation is reported in the present study. CP-titanium was subjected to both uniaxial tension and compression upto 35% deformation. During uniaxial tension, tensile twin of {101 ത 2}<1 ത 011> type and compressive twin of {112 ത 2}<112 ത 3 ത > type were observed in the samples. However, only tensile twin of {101 ത 2}<1 ത 011> type was observed in the samples during uniaxial compression. Volume fractions of the twins were increased linearly as a function of percentage deformation during uniaxial tension. Whereas, during uniaxial compression the twinning volume fraction was increased up to 20% deformation and then decreased rapidly on further increasing the percentage deformation. During uniaxial tension, the general t-type textures were observed in the samples irrespective of the percentage deformation. The initial non-basal texture was oriented to split basal texture during uniaxial compression of the sample. VPSC formulation was used for simulating the texture development in the material. Different hardening parameters were estimated through correlating the simulated stress-strain curve with the experimental stress-strain data. It was observed that, prismatic slip {101 ത 0}<112 ത 0> operated as the primary deformation mode during uniaxial tension whereas basal slip {0001}<112 ത 0> acquired the leading role during deformation through uniaxial compression. It was also revealed that active deformation modes were fully depending on percentage deformation, loading direction, and orientation of grains.
Materials Science and Technology, Jan 3, 2020
ABSTRACT Ti–6Al–4V plates were subjected to warm rolling at 600°C up to 85% reduction in thicknes... more ABSTRACT Ti–6Al–4V plates were subjected to warm rolling at 600°C up to 85% reduction in thickness followed by annealing at 850°C for different soak periods. It was observed that the ‘β’ grains were prevalent along the grain boundaries and at the triple junctions of ‘α’ grains. The samples were found to be fully recrystallised after 30 min of annealing time. Further, globularizarion of ‘α’ grains was observed during the progress of annealing. The recrystallisation mechanism was identified to be through sub-grain formation and its growth. A dominant near basal texture, i.e. , was observed in the samples after annealing.
International Journal of Refractory Metals and Hard Materials
Surface and Coatings Technology, 2022
IOP conference series, Mar 1, 2018
The evolution of texture in commercially pure (CP) titanium during uniaxial tension and compressi... more The evolution of texture in commercially pure (CP) titanium during uniaxial tension and compression through VPSC (Visco-plastic self-consistent) simulation is reported in the present study. CP-titanium was subjected to both uniaxial tension and compression upto 35% deformation. During uniaxial tension, tensile twin of {101 ത 2}<1 ത 011> type and compressive twin of {112 ത 2}<112 ത 3 ത > type were observed in the samples. However, only tensile twin of {101 ത 2}<1 ത 011> type was observed in the samples during uniaxial compression. Volume fractions of the twins were increased linearly as a function of percentage deformation during uniaxial tension. Whereas, during uniaxial compression the twinning volume fraction was increased up to 20% deformation and then decreased rapidly on further increasing the percentage deformation. During uniaxial tension, the general t-type textures were observed in the samples irrespective of the percentage deformation. The initial non-basal texture was oriented to split basal texture during uniaxial compression of the sample. VPSC formulation was used for simulating the texture development in the material. Different hardening parameters were estimated through correlating the simulated stress-strain curve with the experimental stress-strain data. It was observed that, prismatic slip {101 ത 0}<112 ത 0> operated as the primary deformation mode during uniaxial tension whereas basal slip {0001}<112 ത 0> acquired the leading role during deformation through uniaxial compression. It was also revealed that active deformation modes were fully depending on percentage deformation, loading direction, and orientation of grains.
Materials Science and Technology, Jan 3, 2020
ABSTRACT Ti–6Al–4V plates were subjected to warm rolling at 600°C up to 85% reduction in thicknes... more ABSTRACT Ti–6Al–4V plates were subjected to warm rolling at 600°C up to 85% reduction in thickness followed by annealing at 850°C for different soak periods. It was observed that the ‘β’ grains were prevalent along the grain boundaries and at the triple junctions of ‘α’ grains. The samples were found to be fully recrystallised after 30 min of annealing time. Further, globularizarion of ‘α’ grains was observed during the progress of annealing. The recrystallisation mechanism was identified to be through sub-grain formation and its growth. A dominant near basal texture, i.e. , was observed in the samples after annealing.
International Journal of Refractory Metals and Hard Materials
Surface and Coatings Technology, 2022