Dr. S. Krishnanunni

@jecc.ac.in

Assistant Professor



                 

https://researchid.co/skrishnanunni

RESEARCH, TEACHING, or OTHER INTERESTS

Engineering, Mechanical Engineering, Materials Science

3

Scopus Publications

24

Scholar Citations

3

Scholar h-index

1

Scholar i10-index

Scopus Publications

  • Influence of retrogression and reaging treatment on intergranular corrosion resistance and exfoliation corrosion resistance in AA7010 aluminum alloy
    S. Krishnanunni, R. Ranganatha, V. Anil Kumar, R. K. Gupta, and G. Ajithkumar
    ASTM International
    The aluminum alloys with zinc as the primary alloying element (AA7XXX series) exhibit high strength and are widely used as aircraft structural materials. These categories of aluminum alloys in their peak aging condition (T6) are known to be highly susceptible to general as well as stress corrosion cracking (SCC). Retrogression and reaging (RRA) treatment of this category of alloys leads to improvement in the corrosion resistance without significant compromise in strength. SCC was found to be improving in general in these alloys, but the intergranular corrosion (IGC) and exfoliation corrosion (EXCO) need to be evaluated. The effect of RRA heat treatment on the IGC and exfoliation of AA7010 aluminum alloy has been investigated and compared with T6 and T73 temper conditions of the alloy. The results indicate that the corrosion susceptibility of AA7010 aluminum alloy decreased by subjecting the alloy to multistage (RRA) heat treatment. It is attributed to the grain boundary precipitate coarsening and is also the major factor responsible for reducing the susceptibility to IGC and EXCO.

  • Optimization of Heat Treatment Cycles and Characterization of Aluminum Alloy AA7010
    S. Krishnanunni, R. K. Gupta, G. Ajithkumar, and V. Anil Kumar
    Springer Science and Business Media LLC

  • Investigation on effect of optimized RRA in strength and SCC resistance for aluminium alloy AA7010
    S. Krishnanunni, R.K. Gupta, G. Ajithkumar, V. Anil Kumar, and Rahul Ghosh
    Elsevier BV

RECENT SCHOLAR PUBLICATIONS

  • Influence of Retrogression and Reaging Treatment on Intergranular Corrosion Resistance and Exfoliation Corrosion Resistance in AA7010 Aluminum Alloy
    S Krishnanunni, R Ranganatha, V Anil Kumar, RK Gupta, G Ajithkumar
    Materials Performance and Characterization 10 (1), 1-10 2021

  • Investigation on effect of optimized RRA in strength and SCC resistance for aluminium alloy AA7010
    S Krishnanunni, RK Gupta, G Ajithkumar, VA Kumar, R Ghosh
    Materials Today: Proceedings 27, 2385-2389 2020

  • Optimization of Heat Treatment Cycles and Characterization of Aluminum Alloy AA7010
    S Krishnanunni, RK Gupta, G Ajithkumar, V Anil Kumar
    Journal of Materials Engineering and Performance 28, 776-787 2019

  • Effect of welding conditions on hardness of commercially pure titanium
    S Krishnanunni, DJ Paul, V Unni
    Akgec Int J Technol 3 (2), 19-24 2013

  • Heat treatment and corossion studies on aluminium alloy AA7010 for aerospace applications
    S Krishnanunni
    Cochin

MOST CITED SCHOLAR PUBLICATIONS

  • Investigation on effect of optimized RRA in strength and SCC resistance for aluminium alloy AA7010
    S Krishnanunni, RK Gupta, G Ajithkumar, VA Kumar, R Ghosh
    Materials Today: Proceedings 27, 2385-2389 2020
    Citations: 14

  • Effect of welding conditions on hardness of commercially pure titanium
    S Krishnanunni, DJ Paul, V Unni
    Akgec Int J Technol 3 (2), 19-24 2013
    Citations: 6

  • Optimization of Heat Treatment Cycles and Characterization of Aluminum Alloy AA7010
    S Krishnanunni, RK Gupta, G Ajithkumar, V Anil Kumar
    Journal of Materials Engineering and Performance 28, 776-787 2019
    Citations: 4