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  1. No Access

    Article

    Influence of Tool Probe Profiles on the Microstructure Evolution and Mechanical Properties of Al–Zn–Mg–Cu Alloy Friction Stir Weldment

    The present study aims to investigate the influence of tool profiles such as hybrid square, hybrid triangular and conventional threaded tapered on the microstructure evolution and mechanical properties of the ...

    B. Nikhil, P. Govindan, D. Sunilkumar… in Transactions of the Indian Institute of Me… (2024)

  2. Article

    Publisher Correction: Reduction of Iron Ore Pellets: A Microstructural Perspective?

    A. Sarkar, V. Chavan, N. N. Pai, A. Prakash… in Metallurgical and Materials Transactions A (2024)

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    Article

    Reduction of Iron Ore Pellets: A Microstructural Perspective?

    Twenty different iron ore pellets, consisting primarily of Hematite (Fe2O3) phase, were subjected to ‘simulated’ reduction studies. A wide range of reduction time periods, Rt of 122 to 211 minutes, were obtained....

    A. Sarkar, V. Chavan, N. N. Pai, A. Prakash… in Metallurgical and Materials Transactions A (2024)

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    Article

    Remedies for hydrogen-embrittlement on Grade-91 steel weld joint during long delay in PWHT

    This paper discusses the effect of different combinations of preheating and post-heating on the corrosion and hydrogen embrittlement of Grade-91 steel weld joint in the as-welded condition. Though these welds ...

    D. Sunilkumar, Hasan Shaikh, Harish Chandra Dey, Shaju K. Albert in Welding in the World (2021)

  5. No Access

    Article

    EBSD Study on Two Modes of Metal Flow Transfer in Friction Stir Weldment

    In this study, the metal flow phenomenon of friction-stir-welded AA6082-T6 and AA2014-T6 alloys is studied in detail and correlated with hardness measurement. The FSW process was carried out with optimized pro...

    K. T. Thilagham, D. Sunilkumar… in Transactions of the Indian Institute of Me… (2021)

  6. No Access

    Article

    Microstructure and Mechanical Properties Relationship of Friction Stir- and A-GTA-Welded 9Cr-1Mo to 2.25Cr-1Mo Steel

    Dissimilar weldment of 9Cr-1Mo (P9) to 2.25Cr-1Mo (P22) steel processed with fusion welding process must be subjected to post-weld heat treatment (PWHT) prior to operation due to the presence of martensitic mi...

    D. Sunilkumar, S. Muthukumaran, M. Vasudevan… in Journal of Materials Engineering and Perfo… (2021)

  7. No Access

    Article

    Characterization of Interfacial Microstructure and Mechanical Properties of the Diffusion Bonded CP-Ti to AISI 304L Stainless Steel

    This study reports the influence of diffusion kinetics on the interfacial microstructure and its significance in the mechanical properties of the diffusion bonded titanium (Ti) to 304L stainless steel (SS). Th...

    D. Sunilkumar, Harish Chandra Dey… in Transactions of the Indian Institute of Me… (2021)

  8. No Access

    Article

    Friction Stir Welding of 2.25Cr–1Mo Steel to AISI 316LN Stainless Steel

    This study explored the role of tool rpm in the microstructure evolution and its significant effect on hardness measurement of friction stir welded 2.25Cr–1Mo (P22) steel to AISI 316LN stainless steel. Irrespe...

    D. Sunilkumar, Jithin Mathew… in Transactions of the Indian Institute of Me… (2020)

  9. No Access

    Article

    Persistent falcine sinus with temporo-occipital schizencephaly: case report with a review of literature in relation to the undeveloped vein of Galen and/or straight sinus

    Falcine sinus is a normal midline embryonic venous sinus present in the fetal brain and usually disappears by birth. Persistent falcine sinus (PFS) has been reported as a normal variant or along with vein of G...

    D. Sunilkumar, K. Nagarajan, M. Kiran, D. Manjubashini… in Child's Nervous System (2020)

  10. No Access

    Article

    Effect of Tool Rotation Speed on Microstructure and Hardness of Friction-Stir-Welded 9Cr-1Mo Steel

    In this study, friction stir welding (FSW) of 9Cr-1Mo steel was carried out with tungsten lanthanum oxide (W-La2O3) tool to study the influence of tool rotation speeds (200 rpm and 500 rpm) on microstructure and ...

    D. Sunilkumar, S. Muthukumaran, M. Vasudevan… in Transactions of the Indian Institute of Me… (2019)