Amit Arora

Amit Arora
Indian Institute of Technology Gandhinagar · Faculty of Materials Engineering

PhD, The Pennsylvania State University

About

42
Publications
13,986
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
1,237
Citations
Introduction
Amit Arora currently works as Associate Professor of Materials Engineering, Indian Institute of Technology Gandhinagar, India. Amit does research in Materials Engineering and Manufacturing Engineering. Their most recent publication is 'Towards attaining dissimilar lap joint of CuCrZr alloy and 316L stainless steel using friction stir welding'.
Additional affiliations
March 2014 - September 2014
University of North Texas
Position
  • Researcher
November 2011 - June 2021
Indian Institute of Technology Gandhinagar
Position
  • Professor (Associate)
August 2006 - September 2011
Pennsylvania State University
Position
  • Research Assistant
Education
August 2006 - September 2011
Pennsylvania State University
Field of study
  • Materials Science and Engineering
May 2004 - May 2005
Indian Institute of Technology Kharagpur
Field of study
  • Metallurgical Engineering
July 2000 - May 2004
Indian Institute of Technology Kharagpur
Field of study
  • Metallurgical and Materials Engineering

Publications

Publications (42)
Article
The temperature distribution, geometry and size of the melt pool, and solidification parameters were computed using the heat transfer and material flow model for the directed energy deposition process. The thermal cycle and melt pool size were computed for different process parameters such as laser power, deposition speed, and laser beam radius acr...
Article
Electron Beam Melting (EBM) is an emerging additive manufacturing technique for the fabrication of titanium alloy Ti-6Al-4V for orthopedic applications. Here, a hybrid manufacturing technique viz. EBM with Friction Stir Processing (FSP) has been proposed to enhance implant surface properties. The surface modification using FSP reduces the roughness...
Article
Full-text available
Aluminum alloys find application in aerospace, automobile, and structural sectors. However, these alloys are susceptible to corrosion attack in chloride environments. Introducing a second species on the surface by surface composite fabrication can be a way to increase the corrosion resistance of the aluminum alloys. Here, we present corrosion studi...
Article
There have been claims of early use of high-carbon steel in South India. Still, the antiquity, elemental composition and steelmaking process have not been explored adequately. The high carbon steel was known in the Iron Age or early historical period. However, the large-scale use of such steel was prevalent only in the medieval times. This article...
Article
Many microslits are typically manufactured on quartz substrates and are used to improve their industrial performance. The fabrication of microslits on quartz is difficult and expensive to achieve using recent traditional machining processes due to its hardness, electrically insulating nature, and brittleness. The key objective of the current study...
Article
Full-text available
Most aero-engine components and structures are subjected to life critical fatigue loads during service. Near-α titanium alloy IMI 834 is one candidate aero-engine material that is used as high-pressure compressor discs due to its superior fatigue strength and creep resistance. The effect of heat treatment on the microstructure and high-cycle fatigu...
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...
Chapter
Polymer and polymer matrix composite materials are used in automotive applications owing to the high strength-to-weight ratio. However, the joining of polymer matrix composites is a challenging task due to the lower melting temperature, lower thermal conductivity, and agglomeration of reinforcements during fusion welding of these materials. Frictio...
Article
Molybdenum-reinforced aluminum matrix surface composites have been fabricated using friction stir processing. The Mo reinforcement results in an increase in the hardness and a decrease in the grain size. The Mo particle size and its dependence on the tool rotational speed are important for fabrication of high-performance composites. However, the ef...
Article
Full-text available
The study focuses on the effect of mono and combined addition of metallic and ceramic reinforcement particles on the microstructural and corrosion behavior of surface composites fabricated by friction stir processing. Molybdenum, possessing higher corrosion resistance compared to aluminum, is used as the metallic reinforcement, and boron carbide is...
Article
Full-text available
Integral mini-channels fabricated in the metal substrate by friction stir channeling process are different from conventional mini-channels due to irregular shape, and large surface roughness. The effect of axial wall conduction on heat transfer in such mini-channels is significant, which could limit their utilisation as cooling channels in heat tra...
Article
Composites have played a key role in revolutionizing the automobile, marine and aerospace industries. There is a constant attempt for the development of low-density composite materials with superior mechanical and corrosion resistant properties for elevated temperature applications. Here, an attempt has been made to develop a nature-inspired unique...
Article
Full-text available
In this era, advanced non-conducting materials are gaining importance due to their superior properties. However, it is difficult to micro-machine these materials inefficiency and also economically still persists with currently used advanced non-traditional machining processes. Non-traditional machining processes are typically unfeasible for quartz...
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
Additive manufacturing of titanium alloy Ti-6Al-4 V has significantly increased over the past few years, primarily due to its broad application over the conventional manufacturing process for complex and near net shape production. However, difficulties arise while printing complex and huge structures and therefore, the components need a suitable jo...
Article
Molybdenum (Mo), possessing higher hardness compared to aluminum (Al), is used for the surface hardness improvement in Al 1050 alloy. Al-Mo surface composites are developed using friction stir processing with different tool shoulder diameters. Single groove composite (SGC) and double groove composite (DGC) samples are processed with 22-, 20-, and 1...
Article
The microstructure and corrosion behavior of as-cast and friction stir processed in-situ Al−TiB2 based composite in 3.5 wt.% sodium chloride solution were investigated. The microstructure was characterized using X-ray diffractometry, scanning electron microscopy and electron backscattered diffraction technique while corrosion behavior was evaluated...
Article
In this study, an experiment is performed to investigate material flow and its implication on the channel formation in friction stir channeling process. X-ray Computed Tomography in combination with optical microscopy is used to analyse bulk material flow, geometry and various features of the fabricated channel. In addition, X-ray Micro Computed To...
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
Joining different parts is one of crucial component of designing/engineering of materials. To current energy efficient low weight automotive and aerospace components are consisting of different class of materials such as metal, polymer and ceramics etc. Joining these component remains a challenge. Here, we demonstrate joining of metal (alumunium) a...
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
Eglin steel, an ultra-high-strength steel developed for various demanding applications, is a low-cost alternative to 4340 steel, in which nickel and cobalt additions are replaced by higher tungsten additions, thereby achieving comparable strength and ductility. Friction stir processing (FSP) was carried out on this steel under two heat input condit...
Article
Eglin steel, an ultra-high-strength steel developed for various demanding applications, is a low-cost alternative to 4340 steel, in which nickel and cobalt additions are replaced by higher tungsten additions, thereby achieving comparable strength and ductility. Friction stir processing (FSP) was carried out on this steel under two heat input condit...
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
Full-text available
This paper is on the successful fabrication of Metal Matrix Composite (MMC) using an Aluminium plate and Molybdenum powder by Friction Stir Process (FSP). The aim was to produce a superficial MMC layer on the Al plate in order to increase the mechanical properties of the as received Al plate. A uniform dispersion of Mo particles in the Al matrix wa...
Article
A framework is proposed to explain the dissolution and fragmentation of particles during friction stir welding and processing. Two major mechanisms dissolve the particle during the process: (i) thermally activated diffusion, and (ii) dislocation and grain boundary sweeping of atoms. We use a three-dimensional coupled viscoplastic flow and heat tran...
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...
Article
Full-text available
Friction stir welding is not used for hard alloys because of premature tool failure. A scheme is created that exploits th physical three-dimensional heat and mass flow models, and implements them into a fast calculation algorithm, which, when combine with damage accumulation models, enables the plotting of tool durability maps that define the domai...
Article
Full-text available
Tool and workpiece temperatures, torque, traverse force and stresses on the tools are affected by friction stir welding (FSW) variables such as plate thickness, welding speed, tool rotational speed, shoulder and pin diameters, pin length and tool material. Because of the large number of these welding variables, their effects cannot be realistically...
Article
Full-text available
The most important geometric parameter in the friction stir welding (FSW) tool design is the shoulder diameter, which is currently estimated by trial and error. Here, we report a combined experimental and theoretical investigation on the influence of shoulder diameter on thermal cycles, peak temperatures, power requirements, and torque during FSW o...
Article
Full-text available
Although friction stir welding (FSW) is now widely used for the welding of aluminum and other soft alloys, premature tool failure limits its application to hard alloys such as steels and titanium alloys. The tool pin, the weakest component of the tool, experiences severe stresses at high temperatures due to both bending moment and torsion. It is sh...
Article
Given the complexity and resource requirements of numerical models of friction stir welding (FSW), well-tested analytical models of materials flow, peak temperatures, torque, and weld properties are needed. Here an approximate analytical technique for the calculation of three-dimensional material flow during FSW is proposed considering the motion o...
Article
Currently friction stir welding tools are designed by trial and error. Here we propose and test a criterion for the design of a tool shoulder diameter based on the principle of maximum utilization of supplied torque for traction. The optimum tool shoulder diameter computed from this principle using a numerical heat transfer and material flow model...
Article
Full-text available
Structure and properties of steel welds are affected by their cooling rates in the 800 to 500°C range. The available cooling rate correlations are based mostly on heat conduction equation that ignores convective heat transfer and are inaccurate or empirical in nature and valid only for a limited range of welding conditions. Numerical heat and fluid...
Article
Full-text available
Strains experienced by materials during friction stir welding (FSW) are important but scarce in the literature. Here we report the computed strains and strain rates during FSW of AA2524 from a three-dimensional coupled viscoplastic flow and heat transfer model. The strain rates are integrated along a streamline to estimate the accumulated strains e...
Conference Paper
Full-text available
Investigations of heat transfer and fluid flow in the weld pool have become increasingly more realistic and useful in recent years because of advances in computational hardware and software. The goal of this paper is to provide an outline of the major impact of convective heat transfer calculations in advancing welding science and technology and th...
Article
The torque, power requirement and stir zone geometry during friction stir welding of AA2524 aluminum alloy were modeled by solving the equations of conservation of mass, momentum and energy. The model predictions agreed well with the corresponding measured values for a wide range of welding speeds and tool rotational speeds when the heat transfer c...
Article
The geometry of a weld pool affects its solidification behavior. Here we show that the welding parameters and material properties responsible for the formation of unusual, wavy fusion boundaries can be identified from heat and fluid flow calculations and confirmed by independent experiments. These parameters and properties can be expressed by dimen...

Network

Cited By