Pankaj Rathod

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Andrej Dujella

University of Zagreb

Hemin Koyi

Uppsala University

Jana Javornik

University of East London

Graham Martin

University of Leicester

Gwen Robbins Schug

University of North Carolina at Greensboro

Gabriel Gutierrez-Alonso

University of Salamanca

John Sutton

Macquarie University

Eros Carvalho

Universidade Federal do Rio Grande do Sul

Kevin Arbuckle

Swansea University

Jesper Hoffmeyer

University of Copenhagen

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Papers by Pankaj Rathod

Welding of two difficult to weld metals namely 2205 duplex stainless steel and boiler quality steel employing multipass GTAW process

Journal of emerging technologies and innovative research, 2019

Duplex stainless steel comprises of ferrite and austenite phase (50-50 %) shows its good strength... more Duplex stainless steel comprises of ferrite and austenite phase (50-50 %) shows its good strength and corrosion resistance properties in many aggressive environments. In many applications like liquid vessels, heat exchangers, steam pipes, ship building and in oil & gas industries instead of using the whole structure of the duplex material, use of the dissimilar material is increasing day by day. This provides a very good cost flexibility and utilization of properties of both materials. In this study, Gas tungsten arc welding (GTAW) of duplex stainless steel with boiler quality steel has been done by selecting suitable process parameters. Three parameters welding speed, welding current and shielding gas flow rate are taken in the experiments. Microstructural tests and Mechanical tests have been carried out. Analysis and optimization of process parameters have been carried out to improve quality and productivity of welding. IndexTerms Duplex stainless steel, Boiler Quality steel, Diss...

Process Parameter Selection for Uniform Deposition of ChromeCarbide-NickleChrome (Cr3C2-20NiCr) Thermal Flame Spray Coatings on Stainless Steel (SS347H) Boiler tube

International Journal of Engineering Development and Research, 2017

Cr3C2−20NiCr coatings were deposited on 347H steel by Thermal Flame spraying. The thickness of th... more Cr3C2−20NiCr coatings were deposited on 347H steel by Thermal Flame spraying. The thickness of the coated surface, cross section of coating and various phase present in coated surface were investigated using various parameter combinations as per Taguchi method in detail. In industries, various types of coatings are used in so many applications. Different methods are employed to protect the material from abrasion, corrosion, degradation, etc. Thermal spraying is one of the most effective methods to protect the material from high temperature corrosion, stresses and erosion, thus increasing the life of material in use. Flame spray coating is a thermal spraying technique known for providing hard, wear resistant and dense microstructures coatings. Scanning Electron Microscopy and X-Ray diffractometer used to analyze uniformity of coating surface and various phase present in coating. In flame spraying process parameters is more affected on the coating performance. By changing the process ...

A Review of the Coating Characteristics Achieved Employing Thermal Flame-spray Coating Method

In industries, various types of coatings areused in so many applications. Different methods are e... more In industries, various types of coatings areused in so many applications. Different methods are employed to protect the material from abrasion, corrosion, degradation, etc. Thermal spraying is one of the most effective methods to protect the material from wear, high temperature corrosion, stresses and erosion, thus increasing the life of material in use. Flame spray coating is a thermal spraying technique known for providing hard, wear resistant and dense microstructured coatings. This paper provides a comprehensive report of the results of previous research done by various authors on different coatings done employing flame spray coating technique.

Performance Evaluation of Novel Micro-textured Tools in Improving the Machinability of Aluminum Alloy (Al 6063)

Procedia Technology, 2016

Ordered array of dots or grooves induces special functionality to the surface. Two types of textu... more Ordered array of dots or grooves induces special functionality to the surface. Two types of textures viz. linear (perpendicular to the chip flow direction) and square were developed on plain WC inserts using focused ion beam machining. The inserts were coated with MoS 2 solid lubricants using pulsed DC magnetron sputtering. Dry turning tests were carried out on aluminum alloy (Al 6063) work material. Textured tools are found to be more effective in reducing the cutting forces and sticking behaviour of the work material as compared to the non-textured tools. The novel square textured tools performed better than the linear textured tools in terms of reduced cutting forces and improved surface finish. A reduction of about 30% in cutting forces was observed with square textured tools and that with the linear textured tools was about 20% as compared to the non-textured tools. The reduction in cutting forces and the associated change in sticking behaviour are attributed to the reduction in tool-chip contact area and reduced friction at the tool-chip interface owing to the improved lubrication provided by the interlayer of solid lubricant. Textures are functioning as reservoirs of the solid lubricant which in turn reduces the friction at the chip-tool interface.

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A Review On Hard Surface Coatings Applied Using Stellite Hardfacing Techniques

by Pankaj Rathod and Bhargav Khanpara

Weld overlay coating, also known as hardfacing, is a method which involves application of hard an... more Weld overlay coating, also known as hardfacing, is a method which involves application of hard and wear resistant materials on the substrates requiring resistance against abrasion. Wear is the predominant mechanism that controls the life of the machine components. Metal parts often fail in their intended use not only because fracture, but because they wear, which causes them to lose their dimensions and functionality. Among the most common wear modes are – abrasion, impact, metallic (metal to metal), heat, corrosion, etc. Research is going on over last so many years to reduce the wear either byapplying an improved wear resistant material or by improving the wear resistance of the existing material by addition of wear resistant alloying elements. Nevertheless, systematic studies on wear behaviour of new alloys deposited by hardfacing, under different service conditions are scarce. Many methods are in practice for the application of hard coatings on substrates and evaluating their qua...

Evaluating the effectiveness of the novel surface textured tools in enhancing the machinability of titanium alloy (Ti6Al4V)

Journal of Advanced Mechanical Design, Systems, and Manufacturing, 2015

The effectiveness of the novel micro textured tools developed as an attempt to improve the machin... more The effectiveness of the novel micro textured tools developed as an attempt to improve the machinability of Ti6Al4V material is studied. Different types of textures were developed on the rake face of the tools and subsequently coated with a solid lubricant (tungsten disulfide). Square and circular textures are developed for the first time. The textured and coated tools were used for machining Ti6Al4V. Adhesion of the material to the rake face of the tools is observed to be decreased considerably although not eliminated completely. Maximum reduction in the main cutting force was 60% for the square textured tools. Friction at the rake face of the tool is reduced considerably which results in the improvement of tool life. The change in adhesion behaviour and the observed reduction in cutting forces are attributed to the reduction in chip-tool contact area owing to the surface texture on the tool inserts. Further, these textures are acting as reservoirs of solid lubricant. Chip morphology is also found to be favourably altered through the reduction in the segmentation frequency (about 40% for square textured tools and 27% for linear textured tools).

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Drilling of Ti6Al4V

Titanium is light in weight, strong, highly corrosion resistant, biocompatible, and nonmagnetic. ... more Titanium is light in weight, strong, highly corrosion resistant, biocompatible, and nonmagnetic. As titanium processes low specific gravity and high specific strength, titanium and its alloys are used mainly in aerospace, automotive, marine and petrochemical industries. Among all the alloys of titanium, Ti6Al4V is the most widely used alloy. Between the chip of titanium and tool face, high coefficient of friction exists which makes machining of titanium and its alloys difficult. After reviewing many research papers it was noticed that to improve drilling performance of titanium alloy high pressure supply of coolant is desirable. TiAlN coating for carbide tools is considered the most appropriate for drilling. Lower cutting speeds and peck drilling to be employed to achieve better tool life. Other important conclusions drawn from intense literature review have been summarized below. Several researchers have established co-relation amongst cutting parameters and chip morphology. Index ...

Welding of two difficult to weld metals namely 2205 duplex stainless steel and boiler quality steel employing multipass GTAW process

Journal of emerging technologies and innovative research, 2019

Process Parameter Selection for Uniform Deposition of ChromeCarbide-NickleChrome (Cr3C2-20NiCr) Thermal Flame Spray Coatings on Stainless Steel (SS347H) Boiler tube

International Journal of Engineering Development and Research, 2017

A Review of the Coating Characteristics Achieved Employing Thermal Flame-spray Coating Method

Performance Evaluation of Novel Micro-textured Tools in Improving the Machinability of Aluminum Alloy (Al 6063)

Procedia Technology, 2016

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A Review On Hard Surface Coatings Applied Using Stellite Hardfacing Techniques

by Pankaj Rathod and Bhargav Khanpara

Evaluating the effectiveness of the novel surface textured tools in enhancing the machinability of titanium alloy (Ti6Al4V)

Journal of Advanced Mechanical Design, Systems, and Manufacturing, 2015

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Drilling of Ti6Al4V

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