A review of recent progress in solid state fabrication of composites and functionally graded systems via friction stir processing
Authors-Manu srivastava,Sandeep Rathee, Sachin Maheshwari, Arshad Noor Siddiquee.
Publisher- Taylor & Francis
Description- Friction stir processing (FSP) is a rapidly emerging newer solid-state technique for composite fabrication. It involves surface modification which in turn enables successful adaptation of surface properties through plastic deformations in solid state. During initial years of FSP inception, it was primarily employed in development of metal matrix composites of light metal alloys like aluminum. However, recently, it has gained an alluring role in fabrication of composites of various nonferrous and ferrous metal alloys as well as of polymers. In addition to composite fabrication, FSP has evolved as a revolutionary technique in developing functionally graded systems/surfaces (FGS) of metal matrix. This article covers all aspects of FSP in which reinforcement particles are embedded in the base matrix to develop composites and FGS.
Optimisation of FDM process parameters by Taguchi method for imparting customised properties to components
Authors-Manu Srivastava, Sandeep Rathee
Publisher-Taylor & Francis
Description- Customisation of material properties by route of controlling the process parameters is a landmark ability of the additive manufacturing (AM) processes. Parametric optimisation of fused deposition modelling process using Fortus 250mc modeller is accomplished for conical primitives of constructive solid geometry in the present research. Experiments were designed according to the Taguchi technique for four factors at three levels each- slice height (SH), contour width (CW), raster width and air gap (AG). Analysis of signal-to-noise ratios is utilised for establishing the optimal process parameters and the relative percentage contribution of factors is estimated using ANOVA. Optimal levels of process parameters are found to vary with the variation in the type of basic shape of primitive. It has been established that AG has a maximum impact over the part build volume followed by CW and SH.
Distribution of reinforcement particles in surface composite fabrication via friction stir processing: suitable strategy
Authors-Manu Srivastava,Sandeep Rathee, Sachin Maheshwari, Arshad Noor Siddiquee. Journal-Materials and Manufacturing Processes Publisher-Taylor & Francis Description-Fabrication of metal matrix surface composites (SCs) is an emerging trend of friction stir processing applications. Key factors affecting the properties of SCs are process parameters, tool geometry, tool dimensions and reinforcement strategies. In this research, effects of different reinforcement strategies and varying tool offset positions on dispersion of reinforcement particles in the base matrix are investigated. The experiments were performed in two phases using AA6063 as base metal at constant process parameters of 1120 rpm rotational speed, 40 mm/min traverse speed and 2.5° tilt angle. In the first phase, effect of six different reinforcement strategies on the reinforcement particles distribution and defect formation was studied. It was found that groove method with tool offset in retreating side (RS) exhibited better homogeneity in reinforcement distribution out of the six reinforcement strategies considered.Friction based additive manufacturing technologies: principles for building in solid state, benefits, limitations, and applications.
Authors-Manu srivastava,Sandeep Rathee,Sachin Maheshwari, TK Kundra, Arshad Noor Siddiquee
Publisher-CRC Press
Description- Currently, most of the major commercial metal additive manufacturing (MAM) techniques rely on liquid phase processing. The liquid to solid phase transformations in these techniques results in microstructural issues and defects which in turn tantamount to inferior properties of fabricated build. Friction based additive manufacturing technologies are solid state processing techniques which work on the principles of friction based joining processes and layer by layer additive manufacturing. This book primarily addresses the basic understanding of seven friction based additive manufacturing techniques. These techniques include additive manufacturing methods based on rotary friction welding, linear friction welding, friction deposition, friction surfacing, friction stir additive manufacturing, friction assisted seam welding and additive friction stir.
Multi-objective optimisation of fused deposition modelling process parameters using RSM and fuzzy logic for build time and support material.
Authors- Manu Srivastava, Sandeep Rathee, Sachin Maheshwari, TK Kundra.
Journal- International Journal of Rapid Manufacturing
Publisher- Inderscience Publishers (IEL)
Description:Additive manufacturing (AM) is around three-decade-old technology and enables quick transition from concept to physical models in a matter of hours. Fused deposition modelling (FDM) is a promising and robust AM technique with proven ability to build prototypes of complex and intricate shapes using reasonable time and cost. Optimisation of FDM process requires optimisation of various qualitative and quantitative responses. This work presents multi-objective FDM optimisation using RSM embedded fuzzy logic analysis. Six process parameters and two responses are considered for the current experimentation on Fortus 250mc modeller based on FDM technology.
Influence of multiple-passes on microstructure and mechanical properties of Al-Mg/SiC surface composites fabricated via underwater friction stir processing.
Authors- Manu Srivastava, Sandeep Rathee, Sachin Maheshwari, Arshad Noor Siddiquee.
Journal- Materials Research Express
Publisher- IOP Publishing
Description-Friction stir processing (FSP) is a relatively newly developed solid-state process involving surface modifications for fabricating metal matrix surface composites. Obtaining metal matrix nano-composites with uniform dispersion of reinforcement particles via FSP route is an intricate task to accomplish. In this work, AA5059/SiC nano surface composites (SCs) were developed. Effect of multiple FSP passes and SiC addition on microstructure and mechanical properties of fabricated SCs during underwater condition was investigated. Results reflected that the average microhardness value of base metal (BM) increases from 85 Hv to 159 Hv in stir zone of four pass underwater friction stir processed (FSPed) SC.
Investigation on underwater FSP of Al-Mg-Si alloy surface composites.
Authors-Manu Srivastava, Sandeep Rathee, Sachin Maheshwari, Arshad Noor Siddiquee
Journal-Materials Research Express
Publisher-IOP Publishing
Description-In present research, parametric effects of underwater friction stir processing (UWFSP) upon microstructural and mechanical properties is investigated for AA6082/SiC surface composites. Experimental design was accomplished using Taguchi technique and three factors at three levels each were utilized. These factors include-rotational speed of tool, traverse speed of tool and tool shoulder diameter. Responses such as microhardness, ultimate tensile strength (UTS), yield strength (YS) and percentage elongation (% EL) are modeled using regression analysis based on Taguchi's orthogonal array design of experiment. Optimum combinations of process parameters were determined for the selected responses. It was found that each of three process parameters significantly affects the responses.