Gabbita Durga Janaki Ram

 

 

 

 

 

 

 

Contact

 

Dr. G.D. Janaki Ram

Assistant Professor

Department of Metallurgical and Materials Engineering

Indian Institute of Technology Madras, Chennai 600036, India

Phone: +91-44-22574780 (Office) +91-44-22576780 (Home), + 91-9840597364 (Mobile)

Email: jram@iitm.ac.in, gdjram@gmail.com, janakiram_gabbita@yahoo.co.in

Residence: D21/35, Adyar Avenue, IIT Madras, Chennai – 600 036

 

Education

 

  • Ph.D., Metallurgical and Materials Eng.: IIT Madras, Chennai, India, 2005
    • Thesis: Effect of Laves phase on mechanical properties of Inconel 718 welds
  • M.Tech., Metallurgical Eng.: IIT Madras, Chennai, India, 1998
    • Specialization: Welding Technology
    • Thesis: Microstructural refinement of weld fusion zones in a-b titanium alloys 
  • Associate Membership Examination of the Indian institute of Metals (AMIIM), Indian Institute of Metals, Kolkata, 1995
  • Diploma in Metallurgical Eng., Govt. Polytechnic, Vijayawada, India, 1993

 

Employment

 

  • June 2008 – Present: Assistant Professor, Dept. of Metallurgical and Materials Engineering, IIT Madras, Chennai 600036, India
  • June 2006 – May 2008: Adjunct Assistant Professor/Visiting Scholar, Dept. of Mechanical and Aerospace Eng., Utah State University, USA
  • July 2005 – June 2006: Post-Doctoral Visiting Scholar, Dept. of Mechanical and Aerospace Eng., Utah State University, USA
  • Sept. 1998 – July 2005: Scientist, Regional Centre for Military Airworthiness (Materials), Defence Research and Development Organization, Hyderabad, India
  • Feb. 1998 – Sept. 1998: Senior Project Officer Gr. II, Dept. of Metallurgical Eng., Indian Institute of Technology Madras, Chennai, India.
  • Dec. 1993 – Oct. 1995: Asst. Shift Metallurgist, Nava Bharat Ferro Alloys Limited, Paloncha, A.P., India.

 

Research Interests

 

  • Joining of Materials
  • Friction Stir Processing
  • Rapid Manufacturing (Additive Manufacturing)
  • Aerospace Materials
  • Surface Engineering

 

Patents

 

  • US Patent: Surface roughness reduction to improve bonding in ultrasonic consolidation, B. Stucker and G.D. Janaki Ram, US 20070295440, published Dec. 2007.
  • US Patent: Laser based metal deposition of implant structures, D. Justin, B. Stucker, T. Fallin, G.D. Janaki Ram, US 2007/0202351 A1, published Aug. 2007.
  • US Patent: Laser based metal deposition of antimicrobials to implant
    surfaces, D. Justin, B. Stucker, D. Britt, G.D. Janaki Ram, submitted Nov. 2006.

 

Publications

 

I. Refereed Journals

 

1.      S. Sundaresan and G.D. Janaki Ram, Use of magnetic arc oscillation for grain refinement of gas tungsten arc welds in a-b titanium alloys, Science and Technology of Welding and Joining, Vol. 4, 1999, 151-160.

2.      S. Sundaresan, G.D. Janaki Ram and G. Madhusudhan Reddy, Microstructural refinement of weld fusion zones in a-b titanium alloys using pulsed current welding,  Materials Science and Engineering A, A262, 1999, 88-100.

3.      G.D. Janaki Ram, R. Murugesan and S. Sundaresan, Fusion zone grain refinement in aluminium alloy welds through magnetic arc oscillation and its effect on tensile behavior, Journal of Materials Engineering and Performance, Vol. 8, No. 5, 1999, 513-520.

4.      G.D. Janaki Ram, T.K. Mitra, M.K. Raju and S. Sundaresan, Use of inoculants to refine weld solidification structure and improve weldability in type 2090 Al-Li alloy, Materials Science and Engineering A, A276, 2000, 48-57.

5.      S. Sundaresan, G.D. Janaki Ram, R. Murugesan and N. Viswanathan, Combined effect of inoculation and magnetic arc oscillation on microstructure and tensile behaviour of type 2090 Al-Li alloy weld fusion zones, Science and Technology of Welding and Joining, Vol. 5, No. 4, 2000, 257-264.

6.      G.D. Janaki Ram, G.M. Reddy and S. Sundaresan, Effect of pulsed welding current on the solidification structures in Al-Li-Cu and Al-Zn-Mg alloy welds, Practical Metallography, Vol. 37, No. 5, 2000, 276-288.

7.      G.D. Janaki Ram, T.K. Mitra, V. Shankar and S. Sundaresan, Microstructural refinement through inoculation of 7020 Al-Zn-Mg alloy welds and its effect on hot cracking and tensile properties, Journal of Material Processing Technology, Vol. 142, 2003, 174-181.

8.      G.D. Janaki Ram, A. Venugopal Reddy, K. Prasad Rao and G. Madhusudhan Reddy, Control of Laves phase in Inconel 718 GTA welds with current pulsing, Science and Technology of Welding and Joining, Vol. 9, No. 5, 2004, 390-398.

9.      G.D. Janaki Ram, A. Venugopal Reddy, K. Prasad Rao and G. Madhusudhan Reddy, Improvement in stress rupture properties of Inconel 718 GTA welds using current pulsing, Journal of Materials Science, Vol.40, No.6, 2005, 1497-1500.

10.  G.D. Janaki Ram, A. Venugopal Reddy, K. Prasad Rao, G. Madhusudhan Reddy, J.K.S. Sundar, Microstructure and tensile properties of Inconel 718 pulsed Nd-YAG laser welds, Journal of Material Processing Technology, Vol. 167, No. 1, 2005, 73-82.

11.  G.D. Janaki Ram, A. Venugopal Reddy, K. Prasad Rao and G. Madhusudhan Reddy, Microstructural characterization of Inconel 718 gas tungsten arc welds, Practical Metallography, Vol. 42, No. 10, 2005, 481-498.

12.  G.D. Janaki Ram, A. Venugopal Reddy, K. Prasad Rao and G. Madhusudhan Reddy, Microstructure and mechanical properties of Inconel 718 electron beam welds, Materials Science and Technology, Vol. 21, No. 10, 2005, 1132-1138.

13.  G.D. Janaki Ram, A. Venugopal Reddy, K. Prasad Rao, G. Madhusudhan Reddy and A. Sambasiva Rao, Effect of magnetic arc oscillation on microstructure and properties of Inconel 718 GTA welds, Trans. of Indian Institute of Metals, Vol. 59, No.1, 2006, 87-95.

14.  G.D. Janaki Ram, A. Venugopal Reddy, K. Prasad Rao and G. Madhusudhan Reddy, High temperature mechanical properties of Inconel 718 pulsed Nd-YAG laser welds, Materials at High Temperatures, Vol. 23, No.1, 2006.

15.  G.D. Janaki Ram, Y. Yang and B.E. Stucker, Effect of process parameters on bond formation during ultrasonic consolidation of aluminium alloy 3003, Journal of Manufacturing Systems (SME), Vol. 25, No. 3, 2006, 221-238.

16.  B. Vamsi Krishna and G.D. Janaki Ram, Tailoring the precipitation in Al alloys through local plastic deformation, Materials and Design, Vol. 28, 2007, 2239-2243.

17.  G.D. Janaki Ram, C. Robinson, Y. Yang, and B.E. Stucker, Use of ultrasonic consolidation for fabrication of multi-material structures, Rapid Prototyping Journal, Vol.13 (4), 2007, 226-235.

18.  Y. Yang, G.D. Janaki Ram, and B.E. Stucker, An experimental determination of optimum process parameters for fabrication of fiber reinforced aluminum matrix composites using ultrasonic consolidation, Journal of Engineering Materials and Technology – Transactions of the ASME, Vol.129, 2007, 538-549.

19.  G.D. Janaki Ram, C.K. Esplin and B.E. Stucker, Microstructure and wear properties of LENS® deposited medical grade CoCrMo, Journal of Materials Science: Materials in Medicine, Vol.9, No. 5, 2008, 2105-2111.

20.  B.L. Adams, C. Nylander, B. Aydelotte, S. Ahmadi, C. Landon, B.E. Stucker and G.D. Janaki Ram, Accessing the elastic-plastic properties closure by rotation and lamination, Acta Materialia, Vol. 56, No. 1, 2008, 128-139.

21.  G.D. Janaki Ram and B.E. Stucker, LENS® deposition of CoCrMo coatings on titanium implant structures, Trans. ASME: Journal of Manufacturing Science and Engineering, Vol.130, Iss.2, 2008 (doi: 10.1115/1.2898573). 

22.  K. Prasad Rao, G.D. Janaki Ram, and B.E. Stucker, Improvement in corrosion resistance of friction stir welded aluminum alloys with micro arc oxidation coatings, Scripta Materialia, Vol. 58, No. 11, 2008, 998-1001.

23.  S. Salmon, M. Swank, G.D. Janaki Ram, B.E. Stucker, and J.A. Palmer, Effectiveness of epoxy staking of fasteners in aerospace applications, Assembly Automation, in press.

24.  Y. Yang, G.D. Janaki Ram, and B.E. Stucker, Bond formation and fiber embedment during ultrasonic consolidation, Journal of Materials Processing Technology, in press (doi:10.1016/j.jmatprotec.2009.01.014).

25.  J. Obelodan, G.D. Janaki Ram, and B.E. Stucker, and D. Taggart, Minimizing defects between adjacent foils in ultrasonically consolidated parts, Journal of Engineering Materials and Technology.

26.  Y. Yang, G.D. Janaki Ram, and B.E. Stucker, An analytical energy model for metal foil deposition in ultrasonic consolidation, Rapid Prototyping Journal.

 

II. Book Sections

 

1.      B.E. Stucker and G.D. Janaki Ram, Layer-Based Additive Manufacturing Processes, in “Materials Processing Handbook,” J.R. Groza et al. (ed.), Taylor & Francis CRC Press, USA, March 2007.

2.      B. Gupta et al., Ceramics and Ceramic Matrix Composites for Aeronautical Applications, in “Indigenous Aeronautical Nonmetallic Materials,” S. Chand & Co., New Delhi, India, 2002.

 

III. Trade Articles

 

1.      G.D Janaki Ram and B.E. Stucker, US Government Sponsored R&D, Wohlers Report 2008: Rapid Prototyping, Tooling & Manufacturing State of the Industry, Wohlers Associates Inc., Fort Collins, CO, USA.

2.      G.D Janaki Ram and B.E. Stucker, US Government Sponsored R&D, Wohlers Report 2007: Rapid Prototyping, Tooling & Manufacturing State of the Industry, Wohlers Associates Inc., Fort Collins, CO, USA.

3.      G.D Janaki Ram and B.E. Stucker, US Government Sponsored R&D, Wohlers Report 2006: Rapid Prototyping, Tooling & Manufacturing State of the Industry, Wohlers Associates Inc., Fort Collins, CO, USA.

 

IV. Conferences

 

1.      H. Khalid Rafi, G.D. Janaki Ram, G. Phanikumar, and K. Prasad Rao, Structure-property relationships in friction surfaced stainless steel and tool steel coatings, to be presented in THERMEC 2009, Aug. 2009, Berlin, Germany.

2.      H. Khalid Rafi, G.D. Janaki Ram, G. Phanikumar, and K. Prasad Rao, Studies on friction surfacing of austenitic stainless steel on mild steel, International Symposium for Research Scholars (ISRS) 2008, December 2008, IIT Madras, Chennai, India.

3.      H. Khalid Rafi, G.D. Janaki Ram, G. Phanikumar, and K. Prasad Rao, Optimization of friction welding parameters for high strength AA 7075 aluminum alloy, NMD/ATM 2008, November 2008, Indian Institute of Metals, New Delhi, India.

4.      J.O. Obielodan, G.D. Janaki Ram, B.E. Stucker, An experimental determination of optimum foil joint conditions for structural parts fabricated by ultrasonic consolidation, 19th Solid Freeform Fabrication Symposium, Aug. 4-6, 2008, University of Texas at Austin, USA.  

5.      B. Aydelotte, B.L. Adams, C. Nylander, S. Ahmadi, B.E. Stucker, and G.D. Janaki Ram, Recovering textures from the elastic-plastic properties closure, International Symposium on Plasticity and its Current Applications, 3-8 Jan., 2008, Kona, Hawaii, USA.

6.      G.D. Janaki Ram, D.H. Johnson, and B.E. Stucker, Ultrasonic consolidation with aluminum and copper, 3rd International Conference on Advanced Research in Virtual and Rapid Prototyping (VRAP 2007), Leiria, Portugal, 17-22 September, 2007.

7.      G.D. Janaki Ram, Y. Yang, and B.E. Stucker, Deposition of Ti/TiC composite coatings on implant structures using laser engineered net shaping, Proc. 18th Solid Freeform Fabrication Symposium, Aug.6-8, 2007, University of Texas at Austin, USA.

8.      G.D. Janaki Ram, Y. Yang, C. Nylander, B. Aydelotte, B.E. Stucker, B.L. Adams, Interface microstructures and bond formation in ultrasonic consolidation, Proc. 18th Solid Freeform Fabrication Symposium, Aug.6-8, 2007, University of Texas at Austin, USA.

9.      C. Robinson, C. Zhang, G.D. Janaki Ram, E. Siggard, B. Stucker, L. Li, Experimental and analytical analysis of freestanding ribs built using ultrasonic consolidation, 17th Solid Freeform Fabrication Symposium, Aug. 14-16, 2006, University of Texas at Austin, USA.

10.  Y. Yang, G.D. Janaki Ram, and B.E. Stucker, Process parameters optimization for ultrasonically consolidated fiber-reinforced metal matrix composites, 17th Solid Freeform Fabrication Symposium, Aug. 14-16, 2006, University of Texas at Austin, USA.

11.  G.D. Janaki Ram, Y. Yang, J. George, C. Robinson and B.E. Stucker, Improving linear weld density in ultrasonically consolidated parts, 17th Solid Freeform Fabrication Symposium, Aug. 14-16, 2006, University of Texas at Austin, USA.

12.  G.D. Janaki Ram, C. Robinson and B.E. Stucker, Multi-material ultrasonic consolidation, 17th Solid Freeform Fabrication Symposium, Aug. 14-16, 2006, University of Texas at Austin, USA (awarded outstanding research paper).

13.  C.V.S. Murthy, G. Madhusudhan Reddy, K. Prasad Rao, A. Sambasiva Rao, G.D. Janaki Ram and N. Viswanathan, Influence of electron beam oscillation on microstructure and high temperature mechanical properties of Inconel 718 welds, International Welding Symposium on “Productive Welding – The Emerging Scenario” (IWS2K5), Indian Welding Society, 18-20 February 2005, Hyderabad, India, NF01, 1-19 (awarded best paper).

14.  G.D. Janaki Ram, A. Venugopal Reddy, K. Prasad Rao, G. Madhusudhan Reddy, A. Sambasiva Rao,  Effect of post-weld heat treatments on microstructure of Inconel 718 GTA welds, Proc. Conf. International Heat Treat (IHT 2004), January 9-10, 2004, ASM International (Chennai Chapter), Chennai, India, A9, 1-12.

15.  G.D. Janaki Ram and A.V. Reddy, An overview of aeronautical materials and related technologies, Advances in Aeronautical Materials, Oct. 2003, RCMA(M), Hyderabad, India.

16.  G.D. Janaki Ram, A. Venugopal Reddy, K. Prasad Rao and G. Madhusudhan Reddy, Effect of current pulsing on fusion zone microstructure and high temperature tensile properties of Inconel 718 GTA welds, Proc. Conf. National Symposium of Research Scholars on Metals and Materials (NSRS IV), 27-28 Sept. 2002, IIT Chennai, India, p. 6 (awarded best paper).

17.  G.D. Janaki Ram, V. Gopala Krishna, Ch.V.S. Murty, M.S.K. Rao and Y. Balaji, Development and type certification of cast nickel-base superalloy ZC6KVI for MiG series aeroengine applications,  Proc. Conf. NMD/ATM 2001, K. Sarveswara Rao et al. (ed.), 18-21 November 2001, Indian Institute of Metals, Bhubaneswar, India, p. 201.

18.  K. Prasad Rao, G.D. Janaki Ram and G. M. Reddy, Techniques for improving weld mechanical properties, Emerging Trends in Welding Technology, Oct. 2001, Chennai, India.

19.  V. Gopala Krishna, G.D. Janaki Ram, Ch.V.S. Murty, M.S.K. Rao, Y. Balaji and C. Santhi, Techniques for achieving fine grain size in superalloy SU 718A, Advanced Materials and Processes for New Millennium, 22-23 Feb. 2001, Trivandrum, India.

20.  V. Gopala Krishna, Ch.V.S. Murty, G.D. Janaki Ram and M.S.K. Rao, Development and type certification of superalloy AE437B for MiG series aeroengine applications, Proc. Conf. Advances in Aerospace Technologies (SAAT-2000), S. Panneerselvam et al. (ed.), 21-22 Jan. 2000, Aeronautical Society of India, Hyderabad, India, p. 85.

21.  G.D. Janaki Ram, V. Gopala Krishna, Ch.V.S. Murty, M.S.K. Rao, Y. Balaji and C. Santhi, Characterisation of a nickel-base superalloy for indigenous aeroengine applications, NMD/ATM 2000, IIM, 14-17 Nov. 2000, Bhilai, India.

22.  G.D. Janaki Ram and S. Sundaresan, Microstructural refinement of weld fusion zones in an Al-Li-Cu alloy, Proc. Conf. Quality Engineering in Space Technologies (QUEST’99), S. Krishnasamy et al. (ed.), 20-21 August 1999, DRDO, Bangalore, India, p. A34.

23.  G.D. Janaki Ram and S. Sundaresan, Improvement in tensile ductility of titanium alloy weld fusion zones through microstructural modification, Proc. Conf. International Welding Conference (IWC’99), February 1999, New Delhi, India, p. 704.

 

Sponsored Research Projects

 

·        A Rapid Manufacturing Approach to Facilitate Joining of Stainless Steel Pipes to Titanium Pipes, UGC-DAE Consortium for Scientific Research, April 2009 (3 years).

·        Friction Stir Spot Welding of Aluminum Alloy 2014, Indian Space Research Organization, March 2009 (2 years), INR 15,00,000.

·        Development of a New Rapid Manufacturing Process based on Friction Surfacing, New Faculty Scheme, IIT Madras, Nov. 2008 (3 years), INR 5,00,000.

 

Research Group

 

Name

Area of work

Ph.D

J.J. Samuel Dilip

A new route to manufacture fiber-reinforced metal matrix composites – Diffusion bonding of ultrasonically welded monotapes

S. Babu

Development of a new rapid manufacturing process based on friction surfacing

N. Krishna Murty

Use of carbide-free bainite fillers for welding of armor steels

M.Tech

 

S.V. Subramanian

Friction stir processing

I. Hari Prasad

Friction stir spot welding

Project Staff

 

S.V. Sankar 

Friction stir spot welding

P. Gayathri Devi

Friction stir spot welding

 

Teaching

 

  1. Welding Processes II (MM572)
  2. Welding Metallurgy (MM574)
  3. Welding Application Technology (MM575)
  4. Advanced Topics in Metal Joining (MM576)
  5. Additive Manufacturing (MM525)

 

Industrial Consultancy

 

(to be updated)

 

Professional Service

 

  • Serving as a reviewer for a number of international refereed journals.

 

Professional Affiliations

 

·        Indian Institute of Metals (IIM)

·        Indian Welding Society (IWS)

·        Aeronautical Society of India (AeSI)

 

Awards/Honors

 

  • Outstanding Research Paper Award: 17th Solid Freeform Fabrication Symposium, University of Texas at Austin, TX, USA, 14-16 Aug., 2006.
  • Modi Best Paper Award: International Welding Symposium on Productive Welding – The Emerging Scenario (IWS2K5), IWS, Hyderabad, India, 18-20 Feb., 2005.
  • ARCI Best Paper Award: National Research Scholars Symposium on Metals and Materials (NSRS IV), IIT Madras, India, 27-28 Sept., 2002.
  • Appreciation Certificate: Centre for Military Airworthiness and Certification (CEMILAC), DRDO, Development and type certification of various Kaveri aeroengine wrought superalloys, 2001.
  • Appreciation Certificate: CEMILAC, DRDO, Low cycle fatigue performance of superalloy CM247LC integral rotor castings, 1999.
  • Prize in Metallography Contest: Indian Institute of Metals, NMD/ATM-98, Bangalore, India, 14-17 Nov. 1998.