P VIJAYA KUMAR

@raghuinstech.com

Professor & HOD, Mechanical Engineering
RAGHU INSTITUTE OF TECHNOLOGY

P VIJAYA KUMAR


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https://researchid.co/vijaypatta
Dr.P. Vijaya Kumar, obtained his Ph.D. from Andhra University, Visakhapatnam. Presently he is working as Professor & Head of the Department of Mechanical Engineering, Raghu Institute of Technology(A). He published several papers in various international journals of repute. His research interests are Manufacturing Process Technology, Friction Stir Welding, Corrosion of Aluminium Alloys and Composites. He is an alumni of Anna University, Chennai.

EDUCATION

Ph.D on Corrosion of AA7075 Friction Stir Welds.

RESEARCH INTERESTS

Corrosion Engineering, Aluminium Alloys, Solid State Welding, Advanced Materials.
2

Scopus Publications

354

Scholar Citations

5

Scholar h-index

4

Scholar i10-index

Scopus Publications

  • Microstructure, mechanical and corrosion behavior of high strength AA7075 aluminium alloy friction stir welds – Effect of post weld heat treatment
    P. Vijaya Kumar, G. Madhusudhan Reddy, K. Srinivasa Rao
    Defence Technology, 2015
    High strength aluminium alloy AA7075 (Al–Zn–Mg–Cu) is a precipitate hardenable alloy widely used in the aerospace, defense, marine and automobile industries. Use of the heat treatable aluminium alloys in all these sectors is ever-increasing owing to their excellent strength-to-weight ratio and reasonably good corrosion resistance. The shortage in corrosion resistance, however, usually poses negative concern about their reliability and lifetime when they service in the variable marine environments. These alloys also exhibit low weldability due to poor solidification microstructure, porosity in fusion zone and lose their mechanical properties when they are welded by fusion welding techniques. Friction stir welding (FSW) is a reliable technique to retain the properties of the alloy as the joining takes place in the solid state. The welds are susceptible to corrosion due to the microstructural changes in the weld nugget during FSW. In this work, the effect of post weld treatments, viz., peak aging (T6) and retrogression & reaging (RRA), on the microstructure, mechanical properties and pitting corrosion has been studied. Friction stir welding of 8 mm-thick AA7075 alloy was carried out. The microstructural changes of base metal and nugget zone of friction stir welds were studied using optical microscopy, scanning electron microscopy and transmission electron microscopy. Tensile and hardness test of base metal and welds has been carried out. Pitting corrosion resistance was determined through dynamic polarization test. It was observed that the hardness and strength of weld were observed to be comparatively high in peak aged (T6) condition but the welds showed poor corrosion resistance. The resistance to pitting corrosion was improved and the mechanical properties were maintained by RRA treatment. The resistance to pitting corrosion was improved in RRA condition with the minimum loss of weld strength.
  • Microstructure and pitting corrosion of armor grade AA7075 aluminum alloy friction stir weld nugget zone – Effect of post weld heat treatment and addition of boron carbide
    P. Vijaya Kumar, G. Madhusudhan Reddy, K. Srinivasa Rao
    Defence Technology, 2015
    Friction stir welding (FSW) of high strength aluminum alloys has been emerged as an alternative joining technique to avoid the problems during fusion welding. In recent times FSW is being used for armor grade AA7075 aluminum alloy in defense, aerospace and marine applications where it has to serve in non uniform loading and corrosive environments. Even though friction stir welds of AA7075 alloy possess better mechanical properties but suffer from poor corrosion resistance. The present work involves use of retrogression and reaging (RRA) post weld heat treatment to improve the corrosion resistance of welded joints of aluminum alloys. An attempt also has been made to change the chemical composition of the weld nugget by adding B4C nano particles with the aid of the FSW on a specially prepared base metal plate in butt position. The effects of peak aged condition (T6), RRA and addition of B4C nano particles on microstructure, hardness and pitting corrosion of nugget zone of the friction stir welds of AA7075 alloy have been studied. Even though RRA improved the pitting corrosion resistance, its hardness was slightly lost. Significant improvement in pitting corrosion resistance was achieved with addition of boron carbide powder and post weld heat treatment of RRA.

RECENT SCHOLAR PUBLICATIONS

  • Application of Taguchi method for enhancement of tensile and impact strength of PLA/talc/graphene composite printed by fused deposition modeling
    BM Yaseen, RJ Albadr, N Rachchh, A Kumar, R T, A Shankhyan, ...
    Journal of Composite Materials 60 (11), 997-1010 , 2026
    2026
    Citations: 3
  • Two-and three-dimensional probe absorption measurements in diamond germanium-vacancy color centers: publisher’s note
    A Raman, K Rachananjali, AJ Khalaf, R Manjunatha, S Widatalla, ...
    Applied Optics 65 (1), 373-373 , 2025
    2025
  • Performance assessment of a novel design of double slope solar: Energy and water quality analysis
    S Widatalla, H Mohammed, IB Sapaev, R T, JWG Guerrero, A Shankhyan, ...
    Energy Exploration & Exploitation 43 (4), 1683-1704 , 2025
    2025
    Citations: 1
  • Effect of graphite on flax/E-glass/epoxy hybrid polymer composites for its tensile properties: Hybrid polymer composites
    SB Koppula, A Maricharla, ND Borra, Y Phaneendra, VSN Neigapula, ...
    Materials Today: Proceedings 115, 168-173 , 2024
    2024
    Citations: 2
  • Enhancement of tribological properties of AA7075 aluminum alloy using nano-silicon carbide reinforcement: A detailed wear analysis and microhardness study
    Y Phaneendra, IM Rao, PV Kumar, PS Kumari, KS Babu, BA Ben, ...
    Materials Today: Proceedings 115, 229-237 , 2024
    2024
    Citations: 10
  • Heat transfer through different vessels using CFD analysis
    VN Sudha, KS Raghuram, G Bhavani, K Suresh, PV Kumar
    INTERNATIONAL CONFERENCE ON SMART MATERIALS AND STRUCTURES, ICSMS-2022 2810 … , 2023
    2023
  • Taguchi method to enhance the surface roughness
    G Bhavani, VN Sudha, KS Raghuram, K Suresh, PV Kumar
    INTERNATIONAL CONFERENCE ON SMART MATERIALS AND STRUCTURES, ICSMS-2022 2810 … , 2023
    2023
    Citations: 1
  • HSD63 Real-World Data Analysis of Genetic Testing for Inherited Retinal Diseases
    CH Lee, J Liu, P Kumar, J Stahl, S Hengst, D Milentijevic
    Value in Health 26 (6), S249 , 2023
    2023
  • HSD42 Utilization and Cost of Molecular Diagnostics and Genetic Testing Prescribed By Various Medical Specialties in the United States
    CH Lee, J Liu, P Kumar, J Stahl, S Hengst, D Milentijevic
    Value in Health 26 (6), S245 , 2023
    2023
  • OC-112 OUTCOMES OF EMERGENCY INGUINAL HERNIA SURGERIES PERFORMED BY TRAINEES AT A TERTIARY CARE HOSPITAL-AN AUDIT OF 43 CASES
    S Shastri, KKD Poddar, P Kumar, TS Mishra, PK Sasmal, P Behera
    British Journal of Surgery 110 (Supplement_2), znad080. 119 , 2023
    2023
  • OC-109 ONE-YEAR FOLLOW-UP ANALYSIS OF WOUND VS SUTURE LENGTH RATIO AS A PREDICTOR OF INCISIONAL HERNIA-A COHORT STUDY (WISER)
    R Kumar, P Kumar, KK Das Poddar, S Shastri, T Mishra, P Sasmal
    British Journal of Surgery 110 (Supplement_2), znad080. 116 , 2023
    2023
  • OUTCOMES OF EMERGENCY INGUINAL HERNIA SURGERIES PERFORMED BY TRAINEES AT A TERTIARY CARE HOSPITAL-AN AUDIT OF 43 CASES
    S Shastri, KKD Poddar, P Kumar, TS Mishra, PK Sasmal, P Behera
    BJS-BRITISH JOURNAL OF SURGERY 110 , 2023
    2023
  • ONE-YEAR FOLLOW-UP ANALYSIS OF WOUND VS SUTURE LENGTH RATIO AS A PREDICTOR OF INCISIONAL HERNIA-A COHORT STUDY (WISER)
    R Kumar, P Kumar, KK Das Poddar, S Shastri, T Mishra, P Sasmal
    BJS-BRITISH JOURNAL OF SURGERY 110 , 2023
    2023
  • Developing A Combinational Stem Cell-based Tissue Engineering Approach To Treat Spina Bifida Before Birth
    D Hao, SY Lee, C Pivetti, R Gresham, R Somoza, A Hassan, P Kumar, ...
    TISSUE ENGINEERING PART A 29 (9-10) , 2023
    2023
  • Exosomes/EVs: CONJUGATION OF A HIGH-AFFINITY INTEGRIN LIGAND TO THE SURFACE OF STEM CELL-DERIVED EXTRACELLULAR VESICLES FOR TARGETED DELIVERY
    KC Clark, A Amador, L Goldbloom-Helzner, D Wang, D Hao, J Duran, ...
    Cytotherapy 25 (6), S104-S105 , 2023
    2023
  • ASSOCIATION OF TWO COMMON PROPHYLACTIC ANTIBIOTIC REGIMENS IN FRACTURE NECK OF FEMUR SURGERY WITH SURGICAL SITE INFECTION AND C. DIFFICILE DIARRHOEA
    S Mehta, A Goel, U Mahajan, P Kumar
    Orthopaedic Proceedings 105 (SUPP_7), 93-93 , 2023
    2023
  • Viral nucleocapsid gene based real-time polymerase chain reaction assay for estimation of Peste des petits ruminants virus titre in infected cells.
    D Bisht, S Saxena, R Khandare, P Kumar, P Shah, S Shrivastava
    Indian Journal of Comparative Microbiology, Immunology and Infectious … , 2023
    2023
  • Charged particles production in pPb collisions at
    A Pandey, K Saraswat, DS Rawat, MK Singh, V Sharma, D Singh, ...
    Proceedings of the DAE Symp. on Nucl. Phys 67, 1079 , 2023
    2023
  • Pithecellobium dulce used as anthelmintic in vitro against sporocyst, redia, and cercaria larva of Fasciola gigantica
    DK Yadav, P Kumar
    Res. Jr. Agril. Sci 14 (5), 1615-1618 , 2023
    2023
  • Pecteilis triflora. The IUCN Red List of Threatened Species 2023: e. T186884431A186884436
    P Kumar
    2023

MOST CITED SCHOLAR PUBLICATIONS

  • Microstructure, mechanical and corrosion behavior of high strength AA7075 aluminium alloy friction stir welds–Effect of post weld heat treatment
    PV Kumar, GM Reddy, KS Rao
    Defence Technology 11 (4), 362-369 , 2015
    2015
    Citations: 207
  • Microstructure and pitting corrosion of armor grade AA7075 aluminum alloy friction stir weld nugget zone–Effect of post weld heat treatment and addition of boron carbide
    PV Kumar, GM Reddy, KS Rao
    Defence Technology 11 (2), 166-173 , 2015
    2015
    Citations: 106
  • Simulation and CFD analysis of heat pipe with different wick geometry using CFX
    PV Kumar, KD Kumar
    International Journal of Thermal Technologies 5 (03), 210-213 , 2015
    2015
    Citations: 12
  • Enhancement of tribological properties of AA7075 aluminum alloy using nano-silicon carbide reinforcement: A detailed wear analysis and microhardness study
    Y Phaneendra, IM Rao, PV Kumar, PS Kumari, KS Babu, BA Ben, ...
    Materials Today: Proceedings 115, 229-237 , 2024
    2024
    Citations: 10
  • Effect of post weld heat treatments on mechanical and stress corrosion cracking behaviour of Aa7075 friction stir welds
    PV Kumar, GM Reddy, KS Rao
    International Journal of u-and e-service, Science and technology 7 (4) , 2014
    2014
    Citations: 7
  • Affect of different input parameters on weldment characteristics in tungsten inert gas (TIG) welding
    MS Ali, PV Kumar, CV Gopinath, CS Rao
    American Journal of Scientific Research 12 (12), 153-165 , 2010
    2010
    Citations: 4
  • Application of Taguchi method for enhancement of tensile and impact strength of PLA/talc/graphene composite printed by fused deposition modeling
    BM Yaseen, RJ Albadr, N Rachchh, A Kumar, R T, A Shankhyan, ...
    Journal of Composite Materials 60 (11), 997-1010 , 2026
    2026
    Citations: 3
  • Effect of graphite on flax/E-glass/epoxy hybrid polymer composites for its tensile properties: Hybrid polymer composites
    SB Koppula, A Maricharla, ND Borra, Y Phaneendra, VSN Neigapula, ...
    Materials Today: Proceedings 115, 168-173 , 2024
    2024
    Citations: 2
  • Performance assessment of a novel design of double slope solar: Energy and water quality analysis
    S Widatalla, H Mohammed, IB Sapaev, R T, JWG Guerrero, A Shankhyan, ...
    Energy Exploration & Exploitation 43 (4), 1683-1704 , 2025
    2025
    Citations: 1
  • Taguchi method to enhance the surface roughness
    G Bhavani, VN Sudha, KS Raghuram, K Suresh, PV Kumar
    INTERNATIONAL CONFERENCE ON SMART MATERIALS AND STRUCTURES, ICSMS-2022 2810 … , 2023
    2023
    Citations: 1
  • Microstructure, mechanical and corrosion behaviour of AA7075 aluminium alloy friction stir welds
    PV Kumar, GM Reddy, KS Rao
    Indian Welding Journal 51 (2), 66-74 , 2018
    2018
    Citations: 1
  • Two-and three-dimensional probe absorption measurements in diamond germanium-vacancy color centers: publisher’s note
    A Raman, K Rachananjali, AJ Khalaf, R Manjunatha, S Widatalla, ...
    Applied Optics 65 (1), 373-373 , 2025
    2025
  • Heat transfer through different vessels using CFD analysis
    VN Sudha, KS Raghuram, G Bhavani, K Suresh, PV Kumar
    INTERNATIONAL CONFERENCE ON SMART MATERIALS AND STRUCTURES, ICSMS-2022 2810 … , 2023
    2023
  • HSD63 Real-World Data Analysis of Genetic Testing for Inherited Retinal Diseases
    CH Lee, J Liu, P Kumar, J Stahl, S Hengst, D Milentijevic
    Value in Health 26 (6), S249 , 2023
    2023
  • HSD42 Utilization and Cost of Molecular Diagnostics and Genetic Testing Prescribed By Various Medical Specialties in the United States
    CH Lee, J Liu, P Kumar, J Stahl, S Hengst, D Milentijevic
    Value in Health 26 (6), S245 , 2023
    2023
  • OC-112 OUTCOMES OF EMERGENCY INGUINAL HERNIA SURGERIES PERFORMED BY TRAINEES AT A TERTIARY CARE HOSPITAL-AN AUDIT OF 43 CASES
    S Shastri, KKD Poddar, P Kumar, TS Mishra, PK Sasmal, P Behera
    British Journal of Surgery 110 (Supplement_2), znad080. 119 , 2023
    2023
  • OC-109 ONE-YEAR FOLLOW-UP ANALYSIS OF WOUND VS SUTURE LENGTH RATIO AS A PREDICTOR OF INCISIONAL HERNIA-A COHORT STUDY (WISER)
    R Kumar, P Kumar, KK Das Poddar, S Shastri, T Mishra, P Sasmal
    British Journal of Surgery 110 (Supplement_2), znad080. 116 , 2023
    2023
  • OUTCOMES OF EMERGENCY INGUINAL HERNIA SURGERIES PERFORMED BY TRAINEES AT A TERTIARY CARE HOSPITAL-AN AUDIT OF 43 CASES
    S Shastri, KKD Poddar, P Kumar, TS Mishra, PK Sasmal, P Behera
    BJS-BRITISH JOURNAL OF SURGERY 110 , 2023
    2023
  • ONE-YEAR FOLLOW-UP ANALYSIS OF WOUND VS SUTURE LENGTH RATIO AS A PREDICTOR OF INCISIONAL HERNIA-A COHORT STUDY (WISER)
    R Kumar, P Kumar, KK Das Poddar, S Shastri, T Mishra, P Sasmal
    BJS-BRITISH JOURNAL OF SURGERY 110 , 2023
    2023
  • Developing A Combinational Stem Cell-based Tissue Engineering Approach To Treat Spina Bifida Before Birth
    D Hao, SY Lee, C Pivetti, R Gresham, R Somoza, A Hassan, P Kumar, ...
    TISSUE ENGINEERING PART A 29 (9-10) , 2023
    2023

GRANT DETAILS

AICTE-MODROBS: 2017-18: ₹1275000

RESEARCH OUTPUTS (PATENTS, SOFTWARE, PUBLICATIONS, PRODUCTS)

1. P.Vijaya Kumar, G. Madhusudhan Reddy and K. Srinivasa Rao. Microstructure and pitting corrosion of armour grade AA7075 Aluminium alloy friction stir weld nugget zone -Effect of post weld heat treatment and addition of boron carbide, Defense Technology - Elsevier 2015; 11 (2): 166-173.
2. P.Vijaya Kumar, G. Madhusudhan Reddy and K. Srinivasa Rao. Microstructure, Mechanical and Corrosion Behaviour of High Strength AA7075 Aluminium Alloy Friction Stir Welds - Effect of post weld heat treatment. Defense Technology – Elsevier 2015; Vol. 12: 362-369.
3. P.Vijaya Kumar, G. Madhusudhan Reddy and K. Srinivasa Rao. Effect of Post Weld Heat Treatments on Mechanical and Stress Corrosion Cracking Behaviour of AA7075 Friction Stir Welds. International Journal of u-and e-Service, Science and Technology Vol.7, No.4 (2014), . ISSN: 2005-4246 IJUNNEST
4. P. Vijaya Kumar , G. Madhusudhan Reddy , K. Srinivasa Rao Microstructure, Mechanical and Corrosion Behaviour of AA7075 Aluminium Alloy Friction Stir Welds. Indian Welding Journal. , No.2 (2018). ISSN: 0046-9092.
5. P.Vijaya Kumar, Mir Sadat Ali, C.V.Gopinath, Rao, Affect of Different Input Parameters on Weldment Characteristics in Tungsten Inert Gas (TIG) Welding, American Journal of Scientific Research, Issue 12 (2010), . ISSN 1450-223X.