Dr. Rahul Bhattacharya

Metallurgical & Materials Engineer | Project Manager | Extractive Metallurgy | Powder Metallurgy | Hard Materials | Steel | High entropy alloys | High-Temperature Materials | Advanced Electron Microscopy | Advanced Materials Characterization Techniques | Furnace operations | Sustainable Metals Innovation

Dr. Rahul Bhattacharya is a Metallurgical and Materials Engineer with 12 years of combined industrial and academic experience driving innovation across ironmaking, steelmaking, powder metallurgy, cemented carbides, hydrogen-based reduction, advanced alloys, and safety-critical furnace operations. His work integrates industrial metallurgy and manufacturing processes with advanced material characterization and microscopy-driven fundamental research, enabling process optimization and sustainability to develop and implement energy-efficient, fossil-free, sustainable and circular metallurgical solutions.

His expertise spans powder metallurgy, cemented carbides, steels, high-entropy alloys, advanced characterization techniques and high-temperature material behavior, with a strong focus on thermodynamics, kinetics, and process–microstructure–property relationships. Rahul specializes in alloy development, process development, process optimization, furnace sintering, FAST sintering and gas handling. His ongoing research emphasizes on in-operando atomic-scale observation of gas–metal interactions using High-Resolution Environmental TEM (ETEM at nCHREM) during in-situ gas experiments at elevated temperatures, providing direct insight into phase transformations, diffusion, wettability, and sintering mechanisms governing material performance and process efficiency.

🎓 Academic & Professional Background

Rahul holds a Ph.D. in Metallurgical and Materials Engineering through a Joint Cotutelle Doctoral Program, a Master’s degree specializing in powder metallurgy, sintering, oxidation, material degradation, compositionally complex alloys, and advanced high temperature alloys, and a Bachelor’s degree in Metallurgical Engineering. His career uniquely combines large-scale industrial operations with advanced academic research, gaining hands-on experience and skillsets acquired over 12 years on:

• Advanced characterization techniques: (In-situ studies under gas environments in Environmental-TEM at elevated temperatures, BF/DF imaging, STEM, X-EDS, CVD-TEM, HAADF, ADF, Electron Diffraction, NBD, SAED, NanoMEGAS ASTAR Precession Diffraction, HR-SEM, EDS, EBSD, XRD, DSC/TGA, Glow Discharge OES)
• Iron and steelmaking: MIDREX, pelletization, EAF/LF operations, furnace operation and maintenance, H₂ based solid-state reduction)
• Furnace operations: (Safety-critical processes like Sintering, Heat treatment, Vacuum, EAF, LF) along with associated gas handling systems and procedures
• Manufacturing processes: Brazing, joining, welding, casting, metal working, rolling (HR, CR), and forging 
• Powder metallurgy: Mechanical alloying, Ball milling, Solid-state and Semisolid-state sintering, FAST/SPS, Furnace sintering, and nanocrystalline alloys 
• Cemented carbides, other Hard materials and binders (Co-based, Fe/Ni-based, Steel-based, HEA-based)
• Alloy design and Microstructural engineering: (Bimodal grain structure, Oxide dispersion strengthening, solid solution strengthening, grain boundary engineering, crystallographic template effect)
• Synthesis, advanced characterization, design, and structure-property-performance correlations in cemented carbides, high entropy alloys, steels, and transition metals (Co, Fe, Ni, Cr) based binders
• Mechanistic studies: Binder systems, High temperature oxidation and Materials Degradation
• Thermodynamic and kinetic studies of high temperature alloys, metallic materials, and nanomaterials

At ArcelorMittal Nippon Steel India, Rahul gained first-hand experience in gas-based iron ore reduction, EAF/LF Operations, process optimization, steelmaking operations, and Technology Development and Coordination division, developing a strong foundation in large-scale metallurgical manufacturing and a safety first approach.

His research career includes appointments at IIT Madras (India), Deakin University (Australia), the Austrian Academy of Sciences (Erich Schmid Institute, Leoben), and Lund University (Sweden), advancing microscopy-driven process development, solid-state reduction, powder metallurgy, compositionally complex alloys, and low-temperature sintering strategies for cemented carbides.

🔬 Research Focus

Rahul’s current research focuses on enhancing binder wettability, flowability, and capillary-driven rearrangement in cemented carbides, enabling low-temperature densification of WC–Co systems. By leveraging in-situ formation of transient phases (TMPs) that rapidly dephosphorize above 1200 °C, his work demonstrates pathways applicable to Co-, Fe/Ni-, steel-, and HEA-based binders.

Using in-situ Environmental TEM and other advanced characterization techniques, he directly visualizes gas–solid reactions, diffusion, and phase evolution at atomic resolution, particularly at WC/binder interfaces, linking nanoscale mechanisms to macroscopic sintering and reduction behavior.

Core Research Areas:

• Cemented carbides and advanced binder systems
• Nanocrystalline materials and grain growth studies
• Material evaluation, material testing and product development
• Material behaviour at high temperature and pressure
• Hydrogen-based solid-state reduction of Fe, Ni, Co, Cu, and Cr oxides
• Gas actuated Bonding, Semi-solid and Solid state sintering, Joining, Brazing, Casting, Welding, Forging, and Machining
• Powder metallurgy, Furnace sintering, and FAST/SPS 
• Thermodynamic & kinetic modeling of reduction and oxidation
• Microstructure–process–property optimization
• Oxidation, degradation, and failure of advanced alloys
• Fossil-free solid-state ironmaking routes for metal powder production

♻️🌍🍃Industrial Experience

Deputy Manager – Steelmaking Operations
ArcelorMittal Nippon Steel India (formerly Essar Steel), Surat, India
June 2010 – December 2013

As part of one of India’s most advanced integrated steel plants utilizing Midrex-based Direct Reduction of Iron (DRI) technology, I gained extensive industrial experience in Technology Development and Coordination (TDC) Cell, Electric Arc Furnace (EAF), Ladle Furnace (LF) operations, vacuum degassing (VD/RH), and continuous casting. My work focused on producing high-quality steels, low carbon grades, interstitial-free (IF) steels, and boiler pressure vessel grades, ensuring metallurgical consistency and superior mechanical properties.

Key Responsibilities and Achievements:

• Process Optimization & Energy Efficiency: Planned and executed Ladle Furnace (LF) processing, VD/RH treatment, and continuous casting of sequential heats of critical grades (like IFS01, IFS02, IFH01, HSS, BPV, LNC) reducing caster power consumption, minimizing end cuts, and getting cost saving.
• Feed Mix and Yield Improvement: Developed and implemented new feed mix combinations based on process requirements of the Steel Melting Plant, including the optimized use of low-metallic Fe Cold DRI fines, significantly enhancing EAF yield and energy utilization.
• Operational Streamlining: Reduced heat processing and turnaround time by optimizing tapping, LF processing, and casting sequences, enhancing energy efficiency, furnace availability, and throughput.
• Standard Operating Procedures (SOPs): Designed and implemented SOPs for EAF operations using variable feed mixes (hot metal, hot DRI, cold DRI, scrap, DRI fines), ensuring stable melting conditions and reducing process variability.
• Ladle Furnace Operations: Served as Ladle Furnace Operator, directly contributing to the development and refinement of transformer-grade high-silicon steels, interstitial-free steels, extra-deep-drawing steels, and high-strength steels.
• Cost & Material Efficiency: Implemented cost-saving alloying practices and optimized secondary refining processes, and balancing material as well as energy efficiency with product performance

🌍 Current Work & Collaborations

Rahul is currently part of the VINNOVA-funded UGAF Project and ERC project, collaborating with Seco Tools, Alfa Laval, Linde, and Thermo-Calc, alongside A/Prof. Filip Lenrick and Dr. Martin Ek at Lund University. His research at the National Center for High Resolution Electron Microscopy (nCHREM) focuses on in-situ gaseous reactions of metals, alloys, oxides, carbides, binders, and hard materials, supporting Sweden’s vision for fossil-free manufacturing and circular materials innovation.

💡 Professional Strengths

• Integration of process metallurgy, alloy degin, powder processing, manufacturing, and advanced characterization
• Strong skills in experimental design, thermodynamic modeling, and process simulation
• Proven project management in multi-stakeholder industrial–academic collaborations
• Experience in teaching, supervision, patents, technical reports, and peer-reviewed publications
• Fluent in English; actively learning Swedish (Swedish for University Staff, Lund University and SFI C)

Rahul contributes in teaching activities within the Master’s programme in Division of Industrial Production and Materials Engineering at Lund University, focusing on the interaction between materials, processing, and performance.

• Materials and Method Selection – introducing materials selection and process optimization using Ansys GRANTA EduPack with A/Prof. Filip Lenrick
• High Temperature Materials – exploring plasticity, creep, oxidation, and diffusion in metals, alloys, and ceramics at elevated temperatures with A/Prof. Filip Lenrick
• Production Processes- Lectures and experimental demonstration on Casting methods, Injection molding and other relevant techniques with Prof. Volodymyr Bushlya

Rahul has also served as lead supervisor for Master’s theses, including work on annealing effects on oxidation resistance of nanocrystalline high-entropy alloys synthesized via mechanical alloying and SPS.