A5027989203- Welding Techniques and Residual Stresses
- Additive Manufacturing Materials and Processes
- Additive Manufacturing and 3D Printing Technologies
- Advanced Welding Techniques Analysis
- Non-Destructive Testing Techniques
- High Entropy Alloys Studies
- Microstructure and Mechanical Properties of Steels
- Hydrogen embrittlement and corrosion behaviors in metals
- Advanced materials and composites
- Metal and Thin Film Mechanics
- Aluminum Alloy Microstructure Properties
- Fatigue and fracture mechanics
- Surface Treatment and Residual Stress
- Laser Material Processing Techniques
- Metal Alloys Wear and Properties
- Fusion materials and technologies
- Aluminum Alloys Composites Properties
- Metal Forming Simulation Techniques
- Intermetallics and Advanced Alloy Properties
- Laser and Thermal Forming Techniques
- Titanium Alloys Microstructure and Properties
- Metallurgy and Material Forming
- Nuclear Materials and Properties
- Advanced machining processes and optimization
- High Temperature Alloys and Creep
Cranfield University
2015-2024
Electronics Corporation of India
2022
Birla Institute of Technology and Science, Pilani - Goa Campus
2018
Universiti Teknologi Petronas
2012-2015
The Open University
2003-2012
Indian Institute of Technology Kharagpur
2012
Hong Kong Metropolitan University
2002-2010
Chittaranjan National Cancer Institute
2005
Tata Steel (India)
2002
Wire + arc additive manufacture (WAAM) was applied to produce INCONEL 718 superalloy (IN718) components in a layer by manner; further, interpass cold rolling introduced generate in-process thermomechanical processing effect during the deposition process. Mechanical testing showed that with applied, strength of solution plus aging treated WAAM IN718 improved from 1056 MPa (unrolled) 1351 (rolled) which met wrought standard (1276 MPa), and material anisotropy eliminated. The unrolled featured...
Laser welding-brazing technique, using a continuous wave (CW) fibre laser with 8000 W of maximum power, was applied in conduction mode to join 2 mm thick steel (XF350) 6 aluminium (AA5083-H22), lap joint configuration on the top. The surface irradiated by and heat conducted through plate steel-aluminium interface, where melts wets surface. welded samples were defect free weld micrographs revealed presence brittle intermetallic compounds (IMC) layer resulting from reaction Fe Al atoms. Energy...
Wire and Arc Additive Manufacturing (WAAM) technology offers efficient fabrication of large scale products is currently being implemented across various industries. In this study, an experimental investigation has been carried out to characterise the mechanical fracture properties WAAM components made ER70S-6 ER100S-1 metal wires. Microhardness, tensile toughness tests have performed on specimens extracted from built walls which were fabricated using oscillating pattern. The different...
The manufacture of structural components made from nickel-based super alloys would benefit the commercial advantages Wire + Arc Additive Manufacturing (WAAM), as it is commonly expensive to process using other conventional techniques. two major challenges WAAM are residual stress and undesired microstructure. Residual causes part distortion build failures, while as-deposited microstructure does not allow common heat-treatment be effective in achieving desired mechanical properties. This...
In this study, a directed energy deposition (DED) process called wire arc additive manufacturing (WAAM) is employed for the fatigue strengthening of damaged steel members. Three specimens with central cracks were tested under high-cycle loading (HCF) regime: (1) reference specimen; (2) WAAM-repaired specimen an as-deposited profile, and (3) machined to reduce stress concentration factors (SCF). The corresponding finite element (FE) simulation WAAM was calibrated using static experimental...
Nickel Aluminium Bronzes (NAB) are copper-based multi-phase alloys used extensively in marine applications. NAB is vulnerable to seawater corrosion, however the interaction between its corrosion mechanisms and real-world factors including biofouling, weld microstructure residual stress poorly understood. Seawater tests were performed on plasma-welded laboratory environments, demonstrating that retained β' phase Heat Affected Zone (HAZ) experiences Selective Phase Corrosion (SPC), whereas...
Joining of stainless steel and titanium dissimilar metal combination has a specific interest in the nuclear industry. Due to metallurgical incompatibility, it been very difficult produce reliable joints between these metals due formation FeTi Fe2Ti types intermetallic compounds. The incompatibility both materials is enhanced by time–temperature profile welding process used. Brittle intermetallics (IMCs) are formed during Fe–Ti (FeTi Fe2Ti). present study uses low thermal heat input cold...
Functionally graded components are usually preferred for severe and critical service conditions, thanks to the possibility of achieving different complementary material properties within same structure. Wire + Arc Additive Manufacturing is an emerging technology which lends itself well production sound structures. In this study, integral structure two functional gradients, namely tantalum molybdenum, molybdenum tungsten, was successfully deposited. A linear gradient observed in both...
The directed energy deposition (DED) processes, such as laser metal or Wire Arc Additive Manufacturing (WAAM), are gradually becoming the preferred method for fabrication of large-scale components using additive manufacturing (AM) technology.In this work, possibility fatigue life enhancement in WAAM built low carbon steel components, by means rolling and shock peening surface treatment techniques, was investigated.A series crack propagation tests were performed on treated ER70S-6 ER100S-1...
Aluminium copper magnesium alloys are widely used in the aerospace sector. Wire-based Directed Energy Deposition could replace conventional manufacturing routes to build large and semi-complex components for this industry if high mechanical performance can be achieved deposit. The scope of study was assess effect inter-pass rolling on a 2024 aluminium alloy wire-based DED built structure investigate impact cold work during deposition process microstructure performances. deposited using two...
The need for increased manufacturing efficiency of large engineering structures has led to development wire arc additive (WAAM), which is also known as direct energy deposition (DED) method. One the main barriers rapid adoption WAAM technology in wider range industrial applications lack sufficient performance data on components various materials and operational conditions. present study addresses this essential by exploring effects laser shock peening surface treatment corrosion-fatigue...