Dr.S.R.Koteswara Rao

Professor

 rao  Dr.S.R.Koteswara Rao, M.Tech, Ph. D.

Dr.S.R.Koteswara Rao, obtained his BE Degree in Mechanical Engineering fromVasavi College of Engineering (1988, Osmania University, Hyderabad), with a first class distinction. He got his M.Tech., degree in Industrial Metallurgy from REC, Warangal (1992, Kakatiya University). He obtained Ph.D from IIT Madras. His research work on welding of Aluminium alloy AA2219,  wasconducted at Materials Joining Laboratory, Department of Metallurgical and Materials Engineering, IIT M.

He has also obtained an international diploma “International Welding Engineer (IWE)’ from International Institute of welding.

His past experience includes:

  • About 15 years of teaching at various engineering colleges
  • 5.5 years of research as Project Officer at Dept of MME, IITM
  • Principal, Tagore Engineering College – 3 Years
  • Dean (R&D), Tagore Engineering College – 3.5 years
  • Head, Dept of MechEngg., SSN College of Engg – 2 years

Research:

  • Sponsored research Projects completed -5 (funded by Naval Research Board, Armament Research Board, DRDO and other Govt funding agencies).
  • Ongoing Projects-2
  • Ph.Dguidance : Completed – 4, On Going – 8
  • Papers Published in International Refereed Journals – 35
  • Areas of Interest: Welding, Surface Engineering, Corrosion, Materials and Process modelling

Sponsored Research Projects as Principal Investigator

S.No Title of the projectFunding Agency Amount Rs. Lakhs Duration
Status1 Friction Stir welding of Scandium added Al-Mg alloysNaval Research Board (NRB),DRDO 23.94 2006-2009
Completed *2 Gas Tungsten arc assisted friction stir welding of steelsDST 24.45 2008-2011
Completed *3 Friction Stir Welding of AA2219 to AA5083-Dissimilar Aluminium Alloys.DRDO  – ER&IPR 13.69 2010-12
Completed5 Friction Stir Welding of AA7075 thick Plates for heavy Vehicle Aplication.Armament Research Board(ARMREB) 14.03 2012-2014
Completed6 Activated flux GTA welding of duplex stainless steels- Addition of nitrogen to weld metal.UGC-DAE 1.05 2012-2015
Work completed7 Development of  Nitrogen added low Nickel fillers for welding of Duplex Stainless Steels.All India Council for Technical Education (AICTE) 19.32 2013 -2016

On going

*Completed by Co-Investigators after PI moved to TEC 

Papers published in International Refereed Journals

  1. S.R.Koteswara Rao, G.Madhusudhan Reddy, K.Srinivasa Rao, P.Srinivasa Rao, M.Kamaraj, K.Prasad Rao: “Gas Tungsten Arc Welded AA 2219 Alloy using Scandium containing fillers- Mechanical and corrosion behavior”, Transactions of Indian Institute of Metals,57(5), October 2004 , 427-435
  2. S.R.Koteswara Rao, G.Madhusudhan Reddy, P.Srinivasa Rao, M.Kamaraj, K.Prasad Rao: “Improving the mechanical properties of 2219 Aluminum Alloy GTA welds by Scandium addition.”,Science and Technology of Welding and Joining, Vol 10 (4), 2005, 418-426.
  3. S.R.Koteswara Rao, K.Srinivasa Rao, G.Madhusudhan Reddy, M.Kamaraj, K.Prasad Rao: “Reasons for superior Mechanical and Corrosion properties of 2219 Aluminum alloy Electron Beam Welds” Materials Characterization, 55 (2005) 345– 354
  4. S.R.Koteswara Rao, G.Madhusudhan Reddy, M.Kamaraj, K.Prasad Rao: “Grain Refinement through Arc Manipulation Techniques in Al-Cu alloy GTA Welds” Materials Science and Engineering A, 404 (2005) 227–234
  5. S.R.Koteswara Rao, G.Madhusudhan Reddy, K.Prasad Rao: “Effects of thermo-mechanical treatments on mechanical properties of AA 2219 gas tungsten arc welds”, Journal of Materials Processing Technology, 202, (2008) 283-289
  6. S.R.Koteswara Rao,B.Kamsala Devi, K.Srinivasa Rao, K.Prasad Rao: “ Thermo mechanical treatments of Sc and Mg modified Al-Cu alloy welds”, International Journal of Advanced Manufacturing Technology (2009) 45:16–24
  7. S. Vijayan, R. Raju  and S.R.K.Rao: “Friction Stir Welding of Al-Mg Alloy: Comparison of Process Parameter Optimization between Single and Multi response Using Taguchi Methodology”,International Journal of Applied Engineering Research, Volume 4 Number 5 (2009) pp. 709–725
  8. S.Vijayan, R.Raju, K.Subbaiah, N.Sridhar,  S.R.K.Rao: “Friction Stir Welding of Al-Mg alloy-Optimization of process parameters using Taguchi Method”, Experimental Techniques, Volume 34, Issue 5,  (2010) 37–44
  9. K.L. Harikrishna; J.J.S. Dilip; K. RamaswamyChoudary; V.V. Subba Rao; S.R.Koteswara Rao, G.D. Janaki Ram; N. Sridhar; G. Madhusudhan Reddy: “Friction stir welding of Magnesium alloy ZM21”, The Transactions of Indian Institute of Metals,  Vol 63, Issue 5 (2010) 807-811
  10. J J S Dilip, M. Koilraj; V. Sundareswaran; G.D. Janaki Ram, S.R.Koteswara Rao : “Microstructural characterization of dissimilar friction stir welds between  AA2219 and AA5083”, The Transactions of Indian Institute of Metals, Vol 63, Issue 4 (2010) 757-764
  11. S.Vijayan,R.Raju, S.R.K.Rao, ‘Multi-Objective Optimization of Friction Stir Welding Process Parameters on Aluminum Alloy AA 5083 Using Taguchi Based Grey Relation Analysis’,  Materials and Manufacturing Processes 25: (2010) 1206-1212
  12. Koilraj, M., Sundareswaran, V., Vijayan, S., Koteswara Rao, S.R.: Friction stir welding of dissimilar aluminum alloys AA2219 to AA5083 – Optimization of process parameters using Taguchi technique, Materials&Design, volume 42, (2012), 1 – 7
  13. K.Subbaiah, M.Geetha, M.Govindaraju,S.R.KoteswaraRao : Mechanical     properties of Friction Stir welded Cast Al-Mg-Sc alloys, Transactions of  Indian Institute of Metals, Vol. 65, No. 2, (2012) 155-158.
  14. K.Subbaiah, M.Geetha, B.Shanmugarajan, S.R.Koteswara Rao:  Comparative Evaluation of Tungsten Inert Gas and Laser Beam Welding of AA5083- H321, Sadhana – Vol. 37, No. 5, (2012) 587-593.
  15. K.Subbaiah, M.Geetha,B.Shanmugarajan and S.R.Koteswara Rao Effect of Welding speed on CO2 laser beam welded Aluminium-Magnesium alloy 5083 in H321 condition, Advanced Materials Research, Vol. 685, (2013) 259-263.
  16. M. Selvaraj, Vela Murali, S.R. Koteswara Rao, (2013) “Thermal model for friction stir welding of mild steel”, Multidiscipline Modeling in Materials and Structures, Vol. 9 Iss: 1, (2013), 49 – 61
  17. M. Selvaraj, Vela Murali, S.R. Koteswara Rao: Mechanism of weld formation during friction stir welding of aluminum alloy, Materials and Manufacturing Processes, 28: (2013) 595-600.
  18. Hari Krishna Kallipudi, Rama Koteswara Rao Sajja, VenkataSubba Rao Veera: Friction Stir and Gas Tungsten Arc welding of ZM21 Magnesium Alloy., Advanced Materials Research Vol. 909 (2014) pp 77-82
  19. T Srinivasa Rao, G.Madhusudhana Reddy, G.Srinivasa Rao, S.R.Koteswara Rao: Studies on salt fog corrosion behavior of friction stir welded AA7075-T651 Aluminum alloy., International Journal of Materials Research, Volume 105, April 2014, 375-385
  20. G. Srinivasa Rao, V.V Subba Rao, T. Srinivasa Rao, P. Kumara Swamy, R. Karthikeyan, S.R. Koteswara Rao (2014). Corrosion behavior of AFNOR 7020-T6 aluminum alloy friction stir welds under salt fog environment. Internal Journal of Applied Environmental Sciences. ISSN 0973-6077 Vol. 9, No. 3, pp. 837-846.
  21. G. Raja Kumar, M. Manoj, G.D. Janakiram, S.R. Koteswara Rao (2014). Studies on GTA welding of borated stainless steel (304B). Internal Journal of Applied Environmental Sciences. ISSN 0973-6077 Vol. 9, No. 3, pp. 823-830.
  22. R. Sasidharan, S. RajendraBoopathy, K. Periyaswamy: S.R. Koteswara Rao, M. Achudham (2014). Errosion corrosion behavior of duplex stainless steel welds using slurry jet machine. International Journal of Applied Environmental Sciences. ISSN 0973-6077 Vol. 9, No. 3, pp. 871-878.
  23. T Srinivasa Rao, G.Madhusudhana Reddy, S.R.Koteswara Rao: Mechanical and metallurgical characterization of friction stir welded AA7075–T651 aluminum alloy thick plates, Accepted for publication in Transactions of Nonferrous Metals Society of China
  24. T Srinivasa Rao, G.Madhusudhana Reddy, S.R.Koteswara Rao: Effect of in-process cooling on friction stir welding of AA7075-T651 aluminum alloy thick plates, Under Review Journal of Materials and Design
  25. R. Sasidharan, S. RajendraBoopathy, S.R. Koteswara Rao, GanesaMoorthy: Study on Erosion corrosion behavior of Gas Tungsten Arc welded Duplex stainless steel using Taguchi Technique”, The journal of corrosion science and engineering, V.17, 2014, 1-18, Preprint-23
  26. R. Sasidharan, S. RajendraBoopathy, S.R. Koteswara Rao: Effects of Nitrogen added Argon gas flow rate on the mechanical and corrosion properties of duplex stainless steel Gas Tungsten Arc welds., The journal of corrosion science and engineering, V.17, 2014, 1-17, Preprint-22
  27. G. Raja kumar, G.D. Janaki Ram, S.R. Koteswara Rao “Microstructure and Mechanical properties of Borated Stainless Steel (304B) GTA and SMA welds” La MetallurgiaItaliana – n. pp 53-58, May 2015.
  28. G. Raja kumar, G.D. Janaki Ram, S.R. Koteswara Rao “Effect of beam oscillation on borated stainless steel electron beam welds” Materials Testing 57 (2015) 6.
  29. G. Raja kumar, G.D. Janaki Ram, S.R.Koteswara Rao “Effect of activated flux and nitrogen addition on the bead geometry of borated stainless steel GTA welds” High Temperature Materials and Processes, Under Review
  30. G.Srinivasa Rao , V.V.Subba Rao, S.R.Koteswara Rao., “Microstructure and mechanical properties of AA7020-T6 aluminium alloy friction stir welds”, Metal Science and Heat treatment (Springer), accepted for publication ( Jan 2015).
  31. G.SrinivasaRao ,V.V.Subba Rao, S.R.Koteswara Rao., “Microstructure and salt fog corrosion behavior of AA2219 friction stir welded aluminium alloy”, Metal Science and Heat treatment (Springer), accepted for publication ( Jan 2015).

 Journal Publications  : SCI indexed (Thomson Reuters) Journals only 

Sl.

No.

Paper title

Author(s)

Name, volume number   of Journal, and year of publication, page nos.

Impact factor

(2015-16) and ISSN no.

1

Gas Tungsten Arc Welded AA 2219 Alloy using Scandium containing fillers- Mechanical and corrosion behavior S.R.Koteswara Rao, G.Madhusudhan Reddy, K.Srinivasa Rao, P.Srinivasa Rao, M.Kamaraj, K.Prasad Rao Transactions of the Indian Institute of Metals,57(5), October 2004 , 427-435

0.502

ISSN: 0972-2815

2

Improving the mechanical properties of 2219 Aluminum Alloy GTA welds by Scandium addition S.R.Koteswara Rao, G.Madhusudhan Reddy, P.Srinivasa Rao, M.Kamaraj, K.Prasad Rao Science and Technology of Welding and Joining, Vol 10 (4), 2005, 418-426

1.659

ISSN: 1362-1718

3

Reasons for superior Mechanical and Corrosion properties of 2219 Aluminum alloy Electron Beam Welds S.R.Koteswara Rao, K.Srinivasa Rao, G.Madhusudhan Reddy, M.Kamaraj, K.Prasad Rao: Materials Characterization, 55 (2005) 345– 354

2.383

ISSN: 1044-5803

4

Grain Refinement through Arc Manipulation Techniques in Al-Cu alloy GTA Welds S.R.Koteswara Rao, G.Madhusudhan Reddy, M.Kamaraj, K.Prasad Rao

Materials Science and Engineering A, 404 (2005) 227–234

2.647

ISSN: 0921-5093

5

Effects of thermo-mechanical treatments on mechanical properties of AA 2219 gas tungsten arc welds S.R.Koteswara Rao, G.Madhusudhan Reddy, K.Prasad Rao

Journal of Materials Processing Technology, 202, (2008) 283-289

2.359

ISSN: 0924-0136

6

Thermo mechanical treatments of Sc and Mg modified Al-Cu alloy welds S.R.Koteswara Rao, B.Kamsala Devi, K.Srinivasa Rao, K.Prasad Rao:

International Journal of Advanced Manufacturing Technology (2009) 45:16–24

1.568

ISSN: 0268-3768

7

Friction Stir Welding of Al-Mg alloy-Optimization of process parameters using Taguchi Method S.Vijayan, R.Raju, K.Subbaiah, N.Sridhar, S.R.K.Rao Experimental Techniques, Volume 34, Issue 5, (2010) 37–44

0.716

ISSN: 0732-8818

8

Friction stir welding of Magnesium alloy ZM21 K.L. Harikrishna; J.J.S. Dilip; K. Ramaswamy Choudary; V.V. Subba Rao; S.R.Koteswara Rao, G.D. Janaki Ram; N. Sridhar; G. Madhusudhan Reddy:

Transactions of the Indian Institute of Metals, Vol 63, Issue 5 (2010) 807-811

0.502

ISSN: 0972-2815

 

9

Microstructural characterization of dissimilar friction stir welds between AA2219 and AA5083 J.J S Dilip, M. Koilraj; V. Sundareswaran; G.D. Janaki Ram, S.R.Koteswara Rao Transactions of the Indian Institute of Metals, Vol 63, Issue 4 (2010) 757-764

0.502

ISSN: 0972-2815

 

10

Multi-Objective Optimization of Friction Stir Welding Process Parameters on Aluminum Alloy AA 5083 Using Taguchi Based Grey Relation Analysis S.Vijayan, R.Raju, S.R.K.Rao Materials and Manufacturing Processes 25: (2010) 1206-1212  

1.419

ISSN: 1042-6914

11

Friction stir welding of dissimilar aluminum alloys AA2219 to AA5083 – Optimization of process parameters using Taguchi technique Koilraj, M., Sundareswaran, V., Vijayan, S., Koteswara Rao, S.R.: Materials& Design, volume 42, (2012), 1 – 7

3.997

ISSN: 0261-3069

12

Mechanical properties of Friction Stir welded Cast Al-Mg-Sc alloys K.Subbaiah, M.Geetha, M.Govindaraju, S.R.Koteswara Rao Transactions of the Indian Institute of Metals, Vol. 65, No. 2, (2012) 155-158.

0.502

ISSN: 0972-2815

 

13

Comparative Evaluation of Tungsten Inert Gas and Laser Beam Welding of AA5083- H321 K.Subbaiah, M.Geetha, B.Shanmugarajan, S.R.Koteswara Rao Sadhana - Vol. 37, No. 5, (2012) 587-593.

0.349

ISSN 0256-2499

14

Mechanism of weld formation during friction stir welding of aluminum alloy M. Selvaraj, Vela Murali, S.R. Koteswara Rao Materials and Manufacturing Processes, 28: (2013) 595-600. 

1.419

ISSN: 1042-6914

15

Studies on salt fog corrosion behavior of friction stir welded AA7075-T651 Aluminum alloy., T Srinivasa Rao, G.Madhusudhana Reddy, G.Srinivasa Rao, S.R.Koteswara Rao International Journal of Materials Research, Volume 105, April (2014), 375-385

0.687

ISSN: 1862-5282

 

16

Microstructure and Mechanical Properties of Borated stainless steel (304B)GTA and SMA Welds G.Raja KumarG.D.J Ram &S.R.K.Rao Metallurgia Italiana, n.5/(2015), 47-52

0.264

ISSN: 0026-0843

 

17

Mechanical and Corrosion Properties of Friction stir welded joints of Al-Cu Alloy 2219-T87 G.Srinivasa Rao, VVSubba Rao & S.R.Koteswara Rao Materials Testing,57 (2015) 9, 733-743.

0.266

ISSN: 0025-5300

18

Microstructure and Mechanical properties of frictions stir welded AA7075-T651 Aluminum alloy thick plates T.Srinivasa RaoG.M. ReddyS.R.Koteswara Rao Transactions of Non-ferrous metals Society of China, 25 (2015) 1770-1778.

1.34

ISSN: 1003-6326

 

19

Effect of beam oscillation on borated stainless steel electron beam welds G.Raja KumarG.D.Janaki RamS.R.Koteswara Rao Materials Testing,57 ,(2015), 6, 489-494.

0.266

ISSN: 0025-5300

20

Effect of Activated flux and Nitrogen addition on the bead geometry of Borated stainless steel GTA Welds G.Raja KumarG.D.Janaki Ram &S.R.Koteswara Rao Materials and Technolgy, 50 (2016), 3, 103-110

0.312

ISSN: 1580-2949

 

21

Mechanical and Corrosion Properties of Friction stir welded joints of Al-Cu Alloy 2219-T87 R.SasidharanS.Rajendra Boopathy, S.Vijayan,S.R.Koteswara Rao Materials Testing,58 (2016), 4, 312-743.

0.266

ISSN: 0025-5300

22

Studies on variations in microstructure and hardness of AA7075-T651 Aluminum alloy Friction stir welds T.S. RaoG.M. ReddyS.R.K.Rao  Metallurgia Italiana, n.1/(2016), 29-35

0.264

ISSN: 0026-0843

 

23

Optimization of Friction stir welding process parameters for joining ZM21 to AZ31 of dissimilar Magnesium alloys using Taguchi Technique S.PrasathS.Vijayan,S.R.Koteswara Rao  Metallurgia Italiana, n.5/(2016), 25-33

0.264

ISSN: 0026-0843

24

Salt fog corrosion behavior of friction stir welded AA2014-T651aluminum alloy Kollapuri Thamilarasan, Sadayan Rajendra Boopathy,Gankidi Madhusudhan Reddy, Tadivaka Srinivasa Rao and Sajja Rama Koteswara Rao Materials Testing, 58 (2016) 11-12, 932-938

0.266

ISSN: 0025-5300

25

Investigation on variations in hardness and microstructure of in-process cooled 7075 aluminium alloy friction stir welds Tadivaka Srinivasa Rao, Gankidi Madhusudhan Reddy and Sajja Rama Koteswara Rao Materials Testing 59 (2017) 2, 155-160

0.266

ISSN: 0025-5300

RESEARCH:

 Anna University Faculty code          : 3122302

 AICTE Faculty Id                             : 1-2978638234

 Anna University PhD

Supervisor reference no.                  : Old:  03.112.06 /  New: 8320174

 No. of PhD scholars guided: Completed – 6,  Ongoing- 8 

S.No.

Thesis title/Area of research

PhD/MS

Scholar name

University/

College

Status

(year of Completion)

1 Gas Tungsten Arc, Laser and Friction Stir Welding of Mg Alloy ZM21- Mechanical and Corrosion Properties PhD KL. Hari Krishna

JNTU Kakinada

2015

Viva:

05-06-2015

2 Mechanical and Corrosion behavior of Friction Stir Welded AA7075 thick plates PhD T. Srinivasa Rao

Anna University

Chennai

2016

Viva:

7-1-2016

3 Studies on welding of Borated Stainless Steel 304B PhD S. Raja Kumar

Anna University

Chennai

2016

Viva:

4-4-2016

4 Friction Stir Welding of Aluminum alloys 2219 and 7020: Evaluation of Mechanical and corrosion properties PhD G. Srinivasa Rao

JNTU Kakinada

2016

 Viva:

4-4-2016

5* Thermal Model and study on weld formation for Friction Stir Welding of an Aluminum alloy Ph.D Selvaraj M

Anna University

Chennai

2014

Viva:

5-5-2014

6* Friction Stir welding of Dissimilar Aluminum alloys – 2219 to 5083 Ph.D M. Koilraj

Anna University

Chennai

2013

Viva:

4-3-2013

*Joint Supervisor

 Membership in Professional Bodies: Life member of 

  1. Indian Institute of Welding – Reg.No. CHN/M/R-10246/L
  2. Indian Welding Society – No. L-00169
  3. Indian Institute of Metals –

 Sponsored/Consultancy Projects completed / ongoing as Principal Investigator

S.

No

Sponsoring Agency

Project Title

Duration

Amount sanctioned

Status

1

Naval Research Board (NRB),DRDO

 

Friction Stir welding of Scandium added Al-Mg alloys  

2006-09

3 years

23.94

 

Completed *

2

DST

 

Gas Tungsten arc assisted friction stir welding of steels

2008-11

3 Years

24.45

Completed *

3

DRDO – ER&IPR

 

Friction Stir Welding of AA2219 to AA5083-Dissimilar Aluminium Alloys.

2010-12

2 Years

13.69

 

Completed

4

Naval Research Board (NRB),DRDO

 

Joining of Aluminium alloy 5083 to DMR 249 grade steel using CMT-MIG welding.

2012-14

2 Years

14.95

 

Completed

5

Armament Research Board(ARMREB)

DRDO

Friction Stir Welding of AA7075 thick Plates for heavy Vehicle Application

2012-14

2 Years

14.03

 

Completed

6

UGC-DAE

 

Activated flux GTA welding of duplex stainless steels- Addition of nitrogen to weld metal.

2012-15

3 Years

1.05

 

Completed

7

All India Council for Technical Education (AICTE)

Development of Nitrogen added low Nickel fillers for welding of Duplex Stainless Steels.

2013 -16

3 Years

19.32

 

Completed

*Completed by Co-PI after the PI moved out to another institution