K. Umanath

Influence of Process Parameter on Microstructural Characteristics and Tensile Properties of Friction Welded ASS304L Alloy

The rotary type continuous friction welding process is a solid state joining process by mechanically. It produces a joint in the forging pressure contact with rotating and motionless workpiece. The solid state joining process it produces welds with reduced distortion and improved mechanical properties. The austenitic stainless steels are widely used in shipbuilding field, nuclear field and automobile field because of their special mechanical and metallurgical properties. In this work, friction welding of austenitic stainless steel rods of 10mm diameter was investigated with an aim to understand the influence of friction welding process parameters. The details of microstructure analysis using optical microscopy are discussed.

Sensitivity Analysis of Friction Welding Process Parameters on Tensile Properties of ASS304L Alloy

The friction welding method could be a solid state connection method that produces a joint within the forging force contact of revolving and stationary workpiece. The solid state connection method, it produces welds with reduced distortion and improved mechanical properties. The austenitic stainless steels are wide employed in completely different industrial applications like building, nuclear trade and automobile industries owing to their special mechanical and metallurgical properties. During this work, friction welding of austenitic stainless-steel rods of 10mm diameter was investigated with an aim to grasp the sensitivity of friction attachment method parameters. The details of microstructure analysis using optical microscopy are discussed.

Developing the Empirical Relationship to Predict the Minimum Microhardness of AISI 1020 Grade Low Carbon Steel Joints

In this research work, friction welding (FW) of AISI 1020 grade carbon steel rods of 12 mm diameter was investigated with an aim to develop the empirical relationship to predict the minimum micro hardness for the process parameters. Welds are made with various process parameter combinations using ANOVA design matrix which were subjected to Vickers hardness tests. A microstructure analyses was carried out to acquire the joint efficiency. The heat affected zone of the microstructure has been shown for the optimized condition.Keywords:-Friction welding, AISI 1020 grade carbon steel, empirical relationship, Grain structure, Micro hardness.

Developing Empirical Relationships to Predict Tensile Properties of Friction Welded AISI 52100 Grade Steel Rods

In this work, friction welding of AISI 52100 grade steel rods of 12 mm diameter was investigated to predict the value of tensile strength. The Joints made with various process parameter combinations were subjected to tensile tests. The primary process parameters are considered in ratios (friction pressure/friction time, forging pressure/forging time, rotational speed/sec). This is done to make as three factors. Here, the three factors, five levels, central composite, rotatable design matrix are worn to optimize the required number of experiments. The Empirical relationships were developed by Response Surface Method (RSM). The adequacy of the models was checked through ANOVA technique. Through using the developed Empirical relationship, Ultimate Tensile Strength (UTS) of the joints can be predicted by means of 95% confidence level.

Analysis of AISI 1035 Grade Joints Welded Frictionally with Varying Forging Pressure

In this work we have satisfied the objective to analyse the medium carbon steel rods which are welded frictionally on their tensile properties when the welding parameter is maximum and minimum in values of forging pressure with respect to time. This work also carries the macrostructure and microstructure analysis of the weldments so as to identify the metal flow and grain structures in different zones of the welds. This work is carried to identify the suitable level of value of the forging pressure with respect to time and analysing their mechanical properties in that level. Fracture analysis was also carried out in the fracture surface.