Pankaj Sahlot

Pankaj Sahlot
Pandit Deen Dayal Petroleum University · Department of Mechanical Engineering

Doctor of Philosophy

About

22
Publications
25,538
Reads
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189
Citations
Introduction
Additive manufacturing, Friction Stir Welding and processing, Experimental and numerical modeling of Non-conventional manufacturing processes, Tool Wear, Microstructural and mechanical characterization of materials and Simulation of heat transfer and fluid flow.
Skills and Expertise

Publications

Publications (22)
Article
Full-text available
Machine learning (ML) is one of the artificial intelligence tools which uses past data to learn the relationship between input and output and helps to predict future trends. Powder bed fusion additive manufacturing (PBF-AM) is extensively used for a wide range of applications in the industry. The AM process establishment for new material is a cruci...
Article
Wire arc additive manufacturing (WAAM) is a cutting-edge technique for fabricating complex three-dimensional structures. Due to the high thermal gradient and phase transition in the WAAM process, fabricating defect-free structures with good mechanical properties is challenging. As a result, studying the WAAM process is critical for producing 3D com...
Article
Additive manufacturing (AM) is a disruptive technology used in many industries due to the superior mechanical, surface and microstructural properties. Selective laser melting (SLM) is one of the metal additive manufacturing techniques used to fabricate complex metallic components. SLM involves a laser as a heat source and powder as a raw material t...
Chapter
Full-text available
A number of people on the globe have been encountering difficulties in functioning and have almost no suppleness, have been using the wheelchair and other assistive equipment for their assistance for a very long time. It has assisted them in traveling faster and independently at all places possible. With the advent of electrically assisted systems,...
Article
Full-text available
Additive manufacturing (AM) is one of the recently studied research areas, due to its ability to eliminate different subtractive manufacturing limitations, such as difficultly in fabricating complex parts, material wastage, and numbers of sequential operations. Laser-powder bed fusion (L-PBF) AM for SS316L is known for complex part production due t...
Article
Full-text available
Evolution in additive manufacturing is rapid nowadays and it has discovered 4th dimension in myriad of engineering applications. 3D printing technology has gained attention in recent years when Skylar Tibbits has introduced 4th dimension i.e. time in it. Phase change materials can transform its shape, size or properties as a response to external st...
Article
Full-text available
Additive manufacturing (AM) is a novel deposition technique to fabricate a 3D complex component. In AM, fabricating complex geometries is easy to fabricate due to layer-by-layer deposition and provides many advantages over conventional processes. AM technique is used in many industries like aerospace, automobile, marine etc. In the Selective laser...
Chapter
Full-text available
This book chapter provides an overview on magnetic pulse welding (MPW) with fundamental processing details. MPW is a solid-state joining technique that operates with magnetic field to generate plastic deformation responsible for welding. Sustainability point of view, MPW performs better than conventional welding processes. The process principle, ad...
Chapter
Full-text available
Wire arc additive manufacturing (WAAM) has attracted more attention in recent years, due to its ability to create large components with high material deposition rate and low cost of equipment. It is getting more popular nowadays because it provides high strength at low cost, high deposition rate, faster build time, and optimum heat input. In this a...
Chapter
Full-text available
Additive manufacturing (AM) is getting wide acceptance for various applications in the industries to fabricate 3D complex components with least material wastage. However, it is difficult to build the defect-free components with nominal residual stresses and high mechanical strength due to the high thermal gradient during the AM process. Hence, it i...
Article
A three-dimensional heat transfer and material flow-based model using experimentally measured thermophysical properties has been developed for friction stir welding (FSW) of Cu-0.8Cr-0.1Zr alloy. CuCrZr alloy is a precipitation-hardened copper alloy with good electrical and thermal conductivity and moderate strength at elevated temperatures. The te...
Article
Full-text available
A heat transfer numerical model is developed for friction stir welding of dissimilar materials Al 6061 and AZ31 alloy. Thermo-physical properties were experimentally determined for the stir zone and compared with the base alloys. Experimentally determined thermo-physical properties of the stir zone are not strictly the average values of the base al...
Article
Full-text available
High thermal and electrical conductivities, corrosion resistance and relatively good strength lead to use of copper and its alloys for several engineering applications. Copper alloys also find application in the nuclear industry for manufacturing storage canisters for spent nuclear fuel. Conventional fusion welding of copper and its alloys is diffi...
Article
Full-text available
CuCrZr alloy (Cu-0.8wt-%Cr-0.1wt-%Zr) and 316L stainless steel (Fe-0.03wt-%C-16wt-%Cr-10wt-%Ni) plates were successfully friction stir lap welded resulting in significant mechanical mixing of the two matrix elements, Cu and Fe, in the stir zone. The severe mixing not only led to improved load bearing response but also leads to form Cu-rich and Fe-r...
Article
Full-text available
Friction stir welding (FSW) of high melting point metallic (HMPM) materials has limited application due to tool wear and relatively short tool life. Tool wear changes the profile of the tool pin and adversely affects weld properties. A quantitative understanding of tool wear and tool pin profile is crucial to develop the process for joining of HMPM...
Article
Full-text available
Joining of high strength materials using friction stir welding (FSW) is difficult due to severe tool wear and change in the shape/size of the tool. However, quantitative understanding of tool wear during FSW of high melting point metallic materials is very limited. Here we present quantitative wear analysis of H13 steel tool during FSW of CuCrZr al...
Article
An assisted heating tool design was used to obtain better weld surface finish, and lower chip formation and material loss during friction stir welding (FSW) of thermoplastics. The welded coupons of polypropylene with various tool rotational speeds were tested under tensile loading to test the efficiency of the tool design. The proposed tool improve...
Conference Paper
Full-text available
Friction stir welding is carried out on 6mm thick plates of Al 6082 alloy and mild steel, where various welding parameters like, tool rotation speed (rpm), welding speed (mm/min) have been optimized and a suitable range for all parameters is achieved. After welding, good samples are selected and small specimens are cut from it perpendicular to the...

Questions

Questions (10)
Question
How to measure the spatial variation of slip between tool and work piece during Friction Stir Welding ?
Question
Is it possible to accurately measure the coefficient of friction between tool and work piece during Friction Stir Welding by any technique or instruments ?
Question
I am working on Fe-Cr-Cu ternary phase system but unable to get. Kindly send me 
Question
I am working on interaction of copper with steel. Kindly let me know, what type of chemical bonding occurs between copper and steel at high temperature. adhesive bonding or any other ?
Question
I would like to calculate the quantitative wear at high temperature between copper and steel. so I am looking for best Wear model to calculate the quantitative wear.
Question
I am applying Archard model to calculate the quantitative wear during rubbing interaction of steel and copper at high temperature. I would like to know how to calculate or measure the value of wear coefficient in Archard's model between steel and copper material at high temperature. 
Question
I am working on high temperature process (around 700 -900 degree centigrade) where Iron debris particles enter into the copper alloy. I would like to know how iron debris particles can affect the properties of copper alloy.
Question
I am rubbing steel with different grades of copper at high temperature and measuring amount of wear of steel. Every different grades of copper giving different amount of wear for steel . So my question, does the amount of wear of steel depends only on the hardness of materials or any other factors also affects such as alloying elements or any other ?.
Question
I am rubbing steel with different grades of copper at high temperature and measuring amount of wear of steel. Every different grades of copper giving different amount of wear for steel . So my question, does the amount of wear of steel depends only on the hardness of materials or any other factors also affects such as alloying elements or any other ?.
Question
My main motive is to separate copper layer adhere over steel rod but same time steel properties should not change.

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Cited By

Projects

Project (1)
Project
To experimentally understand the tool wear during friction stir welding process and develop numerical models to predict tool wear and tool pin profile during the FSW process.