Shekhar Srivastava | NIT Jalandhar (original) (raw)
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Shahjalal University of Science and Technology
Visvesvaraya Technological University
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Papers by Shekhar Srivastava
Journal of Materials Processing Technology
Rapid Prototyping Journal, 2020
Purpose This paper aims to present a systematic approach in the literature survey related to meta... more Purpose This paper aims to present a systematic approach in the literature survey related to metal additive manufacturing (AM) processes and its multi-physics continuum modelling approach for its better understanding. Design/methodology/approach A systematic review of the literature available in the area of continuum modelling practices adopted for the powder bed fusion (PBF) AM processes for the deposition of powder layer over the substrate along with quantification of residual stress and distortion. Discrete element method (DEM) and finite element method (FEM) approaches have been reviewed for the deposition of powder layer and thermo-mechanical modelling, respectively. Further, thermo-mechanical modelling adopted for the PBF AM process have been discussed in detail with its constituents. Finally, on the basis of prediction through thermo-mechanical models and experimental validation, distortion mitigation/minimisation techniques applied in PBF AM processes have been reviewed to p...
Quality of weld mainly depends on mechanical properties of the weld metal and heat affected zone ... more Quality of weld mainly depends on mechanical properties of the weld metal and heat affected zone (HAZ),
which isin direct relation to the type of welding and its process parameters.Bead geometry variables, heat
affected zone, bead width, bead height, penetration and area of penetration are greatly influenced by
welding process parameter i.e. welding speed, welding current, shielding gas flow rate, voltage, arc travel
speed, contact tip – work distance, type of shielding gas etc. and also it plays an important role in determining
the mechanical properties of the weld such as tensile strength, hardness etc.In this paper, effect
of the various process parameters has been studied on welding of IS:2062 mild steel plate using gas metal
arc welding process with a copper coated mild steel wire of 0.8 mm diameter. A set of experimentshas
been performed to collect the data using Box Behnken Design technique of Response Surface Methodology.
Based on the recorded data, the mathematical models have been developed. Further an attempt has
been made to minimize the bead width and bead height and maximize the depth of penetration using
response surface methodology.
Journal of Materials Processing Technology
Rapid Prototyping Journal, 2020
Purpose This paper aims to present a systematic approach in the literature survey related to meta... more Purpose This paper aims to present a systematic approach in the literature survey related to metal additive manufacturing (AM) processes and its multi-physics continuum modelling approach for its better understanding. Design/methodology/approach A systematic review of the literature available in the area of continuum modelling practices adopted for the powder bed fusion (PBF) AM processes for the deposition of powder layer over the substrate along with quantification of residual stress and distortion. Discrete element method (DEM) and finite element method (FEM) approaches have been reviewed for the deposition of powder layer and thermo-mechanical modelling, respectively. Further, thermo-mechanical modelling adopted for the PBF AM process have been discussed in detail with its constituents. Finally, on the basis of prediction through thermo-mechanical models and experimental validation, distortion mitigation/minimisation techniques applied in PBF AM processes have been reviewed to p...
Quality of weld mainly depends on mechanical properties of the weld metal and heat affected zone ... more Quality of weld mainly depends on mechanical properties of the weld metal and heat affected zone (HAZ),
which isin direct relation to the type of welding and its process parameters.Bead geometry variables, heat
affected zone, bead width, bead height, penetration and area of penetration are greatly influenced by
welding process parameter i.e. welding speed, welding current, shielding gas flow rate, voltage, arc travel
speed, contact tip – work distance, type of shielding gas etc. and also it plays an important role in determining
the mechanical properties of the weld such as tensile strength, hardness etc.In this paper, effect
of the various process parameters has been studied on welding of IS:2062 mild steel plate using gas metal
arc welding process with a copper coated mild steel wire of 0.8 mm diameter. A set of experimentshas
been performed to collect the data using Box Behnken Design technique of Response Surface Methodology.
Based on the recorded data, the mathematical models have been developed. Further an attempt has
been made to minimize the bead width and bead height and maximize the depth of penetration using
response surface methodology.