S.S. Nayak, Ph.D., EIT Research Associate Centre for Advanced Materials Joining Mechanical and Mechatronics Engineering University of Waterloo 200 University Avenue West Waterloo, ON N2L 3G1, Canada Ph: 1-519-888-4567 extension 35256 E-mail: sashank@uwaterloo.ca Click to view my profiles: GoogleScholar, ReserchGate, LinkedIn

skills and interests

· Physical Metallurgy

· Processing-structure-property correlation

· Transmission Electron Microscopy (TEM) and X-ray Diffraction (XRD)

· Advanced High Strength Steels

· Laser beam and resistance spot welding

· Nanocrystalline materials and nanocomposites

· Non-equilibrium processing

work Experience

· 2012 - present: Research Associate, Center for Advanced Materials Joining, University of Waterloo, Canada

· 2009 - 2012: Postdoctoral Fellow, Center for Advanced Materials Joining, University of Waterloo, Canada

· 2007 - 2009: Postdoctoral Research Associate, Center for Structural and Functional Materials, University of Louisiana at Lafayette, USA

· 2005: Guest Scientist, Division of Structure Research, Hahn-Meitner-Institut, Berlin, Germany

· 2004: Visiting Researcher, Center for Non-crystalline Materials, Department of Metallurgical Engineering, Yonsei University, Seoul, South Korea

· 2002-2003: Research Assistant, Department of Metallurgical and Materials Engineering, IIT Kharagpur, India

EDuCATION

PhD, Metallurgical and Materials Engineering, Indian Institute of Technology

MTech, Metallurgical and Materials Engineering, Indian Institute of Technology

BE, Metallurgy Engineering, Indira Gandhi Institute of Technology

awards and honors

· Invited speaker, Fifth International Conference on Solidification Science and Processing (ICSSP5), 19-22 November 2012, Bhubaneswar, India

· Invited speaker, 9^th International Conference on Trends in Welding Research, 4-8 June 2012, Chicago, USA

· Invited speaker, 99^th Indian Science Congress, 3-7 January 2012, Bhubaneswar, India

· Reviewer for: Metallurgical and Materials Transactions A, Materials Science and Engineering A, Journal of Alloys and Compounds, Materials and Design, Journal of Materials Science, Materials Science and Technology, Journal of Materials Engineering and Performance, Materials Characterization, Materials Chemistry and Physics, Transactions of the Indian Institute of Metals, Journal of Materials Science and Technology, Advanced Powder Technology, Optics and Laser in Engineering, The Arabian Journal of Science and Engineering, Radiation Effects and Defects in Solids

· Research Scholar, Department of Metallurgical and Materials Engineering, IIT Kharagpur, India from February 13, 2003 to January 29, 2007

· Best Technical Paper, International Symposium of Research Scholars in Materials Science and Engineering (ISRS-2004), December 20-22, 2004, IIT Madras, Chennai, India

· Binani Gold Medal 2004, awarded for the best paper published under non-ferrous category in the Transactions of The Indian Institute of Metals

· Senior Research Fellow, National Level Fellowship funded by Council of Industrial and Scientific Research (CSIR), India from July 1, 2003 to June 30, 2005

· Postgraduate scholarship awarded by Ministry of Human Resources and Development, India to pursue Master of Technology at IIT Kharagpur during July, 2000 to January,2002

· All India Rank 65 in the national level examination, Graduate Aptitude Test in Engineering (GATE) 2000

PUBLICATIONS

In Journals:

1. D.C. Saha, D. Westerbaan, S.S. Nayak, E. Biro, A.P. Gerlich, Y. Zhou. Microstructure-properties correlation in fiber laser welding of dual-phase and HSLA steels, Materials Science and Engineering A, 607, 2014, pp. 445-453

2. D. Westerbaan, D. Parkes, S.S. Nayak, D.L. Chen, E. Biro, F. Goodwin, Y. Zhou. Effects of concavity on tensile and fatigue properties in fibre laser welding of automotive steels, Science and Technology of Welding and Joining, 19, 2014, pp. 60-68

3. D. Parkes, D. Westerbaan, S.S. Nayak, Y. Zhou, F. Goodwin, S. Bhole, D.L. Chen. Tensile properties of fiber laser welded joints of high strength low alloy and dual-phase steels at warm and low temperatures, Materials and Design, 56, 2014, pp.193-199

4. J. Li, S.S. Nayak, E. Biro, S.K. Panda, F. Goodwin, Y. Zhou: Effects of weld line position and geometry on the formability of laser welded high strength low alloy and dual-phase steel blanks, Materials and Design, 52, 2013, pp. 757-766

5. D. Parkes, W. Xu, D. Westerbaan, S.S. Nayak, Y. Zhou, F. Goodwin, S. Bhole, D.L. Chen: Microstructure and fatigue properties of fiber laser welded dissimilar joints between high strength low alloy and dual-phase steels, Materials and Design, 51, 2013, pp. 665-675

6. W. Xu, D. Westerbaan, S.S. Nayak, D.L. Chen, F. Goodwin, Y. Zhou: Tensile and fatigue properties of fiber laser welded high strength low alloy and DP980 dual-phase steel joints, Materials and Design, 43, 2013, pp. 373-383

7. S.S. Nayak, D.H. Kim, S.K. Pabi, B.S. Murty: Nanocomposites of aluminum alloys by rapid solidification processing, Transactions of The Indian Institute of Metals, 65, 2012, pp. 647-651

8. A. Santillan Esquivel, S.S. Nayak, M.S. Xia, Y. Zhou: Microstructure, hardness and tensile properties of fusion zone in laser welding of advanced high strength steels, Canadian Metallurgical Quarterly, 51, 2012, pp. 328-335

9. W. Xu, D. Westerbaan, S.S. Nayak, D.L. Chen, F. Goodwin, E. Biro, Y. Zhou: Microstructure and fatigue performance of single and multiple linear fiber laser welded DP980 dual-phase steel, Materials Science and Engineering A, 553, 2012, pp. 51-58

10. S.S. Nayak, V.H. Baltazar Hernandez, Y. Okita, Y. Zhou: Microstructure-hardness relationship in the fusion zone of TRIP steel welds, Materials Science and Engineering A, 551, 2012, pp. 73-81

11. S.S. Nayak, V.H. Baltazar Hernandez, Y. Zhou: Effect of chemistry on nonisothermal tempering and softening of dual-phase steels, Metallurgical and Materials Transactions A, 42, 2011, pp. 3242-3248

12. V.H. Baltazar Hernandez, S.S. Nayak, Y. Zhou: Tempering of martensite in dual-phase steels and its effects on softening behavior, Metallurgical and Materials Transactions A, 42, 2011, pp. 3115-3129

13. S.S. Nayak, H.J. Chang, D.H. Kim, S.K. Pabi, B.S. Mruty: Formation of metastable phases and nanocomposite structures in rapidly solidified Al-Fe alloys, Materials Science and Engineering A, 528, 2011, pp. 5967-5973

14. R.D.K. Misra, S. Nayak, P. Venkatasurya, V. Ramuni, Mahesh Somani, L. Karjalainen: Nanograined/ultrafine-grained structure and tensile deformation behavior of shear phase reversion-induced 301 austenitic stainless steel, Metallurgical and Materials Transactions A, 41, 2010, pp. 2162-2174

15. S.S. Nayak, M. Wollgarten, J. Banhart, S.K. Pabi, B.S. Murty: Nanocomposites and an extremely hard nanocrystalline intermetallic of Al-Fe alloys prepared by mechanical alloying, Materials Science and Engineering A, 527, 2010, pp. 2370-2378

16. S.S. Nayak, S.K. Pabi, D.H. Kim, B.S. Murty: Microstructure-hardness relationship of Al-(L1₂)Al₃Ti nanocomposites prepared by rapid solidification processing, Intermetallics, 18, 2010, pp. 487-492

17. S.S. Nayak, S.K Pabi, B.S. Murty: Al-(L1₂)Al₃Ti nanocomposites prepared by mechanical alloying: Synthesis and mechanical properties, Journal of Alloys and Compounds, 492, 2010, pp. 128-133

18. R.D.K. Misra, S. Nayak, S.A. Mali, J.S. Shah, M.C. Somani, L.P. Karjalainen: On the significance of nature of strain-induced martensite on phase-reversion-induced nanograined/ultrafine-grained austenitic stainless steel, Metallurgical and Materials Transactions A, 41, 2010, pp. 3-12

19. R.D.K. Misra, S. Nayak, S.A. Mali, J.S. Shah, M.C. Somani, L.P. Karjalainen: Microstructure and deformation behavior of phase-reversion induced nanograined/ultrafine-grained (NG/UFG) austenitic stainless steel, Metallurgical and Materials Transactions A, 40, 2009, pp. 2498-2509

20. S.S. Nayak, R. Anumolu, R.D.K. Misra, K.H. Kim, D. Lee: Microstructure-hardness relationship in quenched, partitioned medium-carbon and high-carbon steels containing silicon, Materials Science and Engineering A, 498, 2008, pp. 442-456

21. S.S. Nayak, R.D.K. Misra, J. Hartmann, F. Siciliano, J.M. Gray: Microstructure and properties of low manganese and niobium containing HIC pipeline steel, Materials Science and Engineering A, 494, 2008, pp. 456-463

22. R.D.K. Misra, S.A. Mali, S.S. Nayak, M. Somani, P. Karjalainen: Favorable surface adhesion response of electrocrystallized nanohydroxyapatite on ultrafine-grained/nanograined austenitic stainless steel, Scripta Materialia, 59, 2008, pp. 834-837

23. S.S. Nayak, B.S. Murty, S.K. Pabi: Structure of nanocomposites of Al-Fe alloys prepared by mechanical alloying and rapid solidification processing, Bulletin of Materials Science, 31, 2008, pp. 449-454

24. S.S. Nayak, S.K. Pabi, B.S. Murty: High strength nanocrystalline L1₂-Al₃(Ti,Zr) intermetallics synthesized by mechanical alloying, Intermetallics, 15, 2007, pp. 26-33 (Appeared in Top 25 hottest articles during October to December 2006)

25. S.S. Nayak, D.H. Kim, S.K. Pabi, B.S. Murty: Al-based nanocomposites by non-equilibrium processing routes, Transactions of The Indian Institute of Metals, 59, 2006, pp. 193-198

26. S.S. Nayak and B.S. Murty: Synthesis and stability of L1₂-Al₃Ti by mechanical alloying, Materials Science and Engineering A, 367, 2004, pp. 218-224

27. S.S. Nayak and B.S. Murty: Synthesis of nanocrystalline L1₂-Al₃Zr and Al₃Ti by mechanical alloying, Transactions of The Indian Institute of Metals, 46, 2003, pp. 457-463 (Binani Gold Medal for the best paper published in non-ferrous metals category)

In Conference Proceedings:

28. D. Parkes, Q. Cui, D. Westerbaan, S.S. Nayak, Y. Zhou, F. Goodwin, D. Liu, S. Bhole, D.L. Chen: Effect of fiber laser welding parameters on the fatigue properties of dissimilar welded joints between DP980 and HSLA steels, SAE 2014 World Congress and Exhibition, April 8-10, 2014, Detroit, USA, Paper # 2014-01-0990

29. Y. Okita, R. Ikeda, K. Oi, V.H. Baltazar Hernandez, S.S. Nayak, Y. Zhou: Effect of hardness distribution on the tensile shear properties of resistance spot-welded dual-phase steel, The 66^th Annual Assembly of the International Institute of Welding Commission III, 2013, Essen, Germany, pp. 1-16 (IIW DOC. III-1661-13)

30. S.S. Nayak, Y. Zhou, V.H. Baltazar Hernandez, E. Biro: Resistance Spot Welding of Dual-Phase Steels: Heat affected zone softening and tensile properties, Trends in Welding Research 2012: Proceedings of the 9^th International Conference (ASM International), 2013, pp. 641-649

31. E. Biro, S.S. Nayak, Y. Zhou: Changes in mechanical properties of dual-phase steel due to post-welded microstructure and loading geometry, Trends in Welding Research 2012: Proceedings of the 9^th International Conference (ASM International), 2013, pp. 201-207

32. C.J. Martínez-González, A. López-Ibarra, S. Haro-Rodriguez, V.H. Baltazar-Hernandez, S.S. Nayak, Y. Zhou: Effects of holding time on HAZ-softening in resistance spot welded DP980 steels, Proceeding of 2012 IMRC Meeting, Volume 1485, MRS Online Proceedings Library, 2013, DOI: http://dx.doi.org/10.1557/opl.2013.255.

33. D. Huang, S.S. Nayak, M.A. Wells, Y. Zhou, E. Biro: Comparison of Isothermal Gleeble Treatment and HAZ of Dual-Phase Steels, Proceedings of Sheet Metal Welding Conference XV 2012, Livonia, USA, pp. 1-11 (paper 1-5)

34. Daniel Westerbaan, Sashank Nayak, Dennis Parkes, Wen Xu, Daolun Chen, Sanjeev Bhole, Frank Goodwin, Elliot Biro, Norman Zhou: Microstructure and Mechanical Properties of Fiber Laser Welded DP980 and HSLA Steels, Sheet Metal Welding Conference XV 2012, Livonia, USA, pp. 1-17 (paper 3-1)

35. Wen Xu, Daolun Chen, Frank Goodwin, Elliot Biro, Daniel Westerbaan, Sashank Nayak, Norman Zhou: Fatigue Resistance of Laser Welded Dual-Phase Steel Joints, Sheet Metal Welding Conference XV 2012, Livonia, USA, pp. 1-11 (paper 3-2)

36. Y. Okita, V.H. Baltazar Hernandez, S.S. Nayak, Y. Zhou, R. Ikeda, K. Oi: Effect of Hardness Distribution on Lap-Shear Tensile Performance of Resistance Spot-Welded High Strength Steel, The 90^th Japan Welding Society National Conference, 2012

37. Y. Okita, V.H. Baltazar Hernandez, S.S. Nayak, Y. Zhou, R. Ikeda, S. Endo: Effect of HAZ-softening on Lap-Shear Tensile Performance of Resistance Spot-Welded High Strength Steel, The 89^th Japan Welding Society National Conference, 36-37, 2011

38. Yasuaki Okita, V.H. Baltazar Hernandez, S.S. Nayak, Y. Zhou: Effect of HAZ-Softening on the Failure Mode of Resistance Spot-Welded Dual-Phase Steel, Sheet Metal Welding Conference XIV, 2010, Livonia, USA, pp. 1-12 (paper 1-4)

39. S.S. Nayak, D.H. Kim, S.K. Pabi, B.S. Murty: Al-based nanocomposites by non-equilibrium processing routes, International Symposium of Research Scholars in Materials Science and Engineering, 2004, Chennai, India (Awarded Best Technical Paper)

40. Jatin Bhatt, S.S. Nayak, S.K.S. Parashar, B.S. Murty: Novel Materials by Mechanical Alloying, Proceedings of Conference on Futuristic Materials, Editors: B.B. Jha, R.K. Galgali and V.N. Mishra, Allied Publishers, Kolkata, 2004, pp. 936-944

41. B.S. Murty, Jatin Bhatt, S.S. Nayak, S.K.S. Parashar, S.K. Pabi: Nanocrystalline materials synthesized by mechanical alloying, Proceedings of the International Conference on Nanomaterials Synthesis, Characterization and Application, Vol. 161, Tata McGraw Hill, 2004, pp. 161-170

Papers pRESENTED IN ConferenceS/SEMINARS (also includes co-authored presentations)

1. D.C. Saha, S.S. Nayak, P. Penner, Y. Zhou, A.P. Gerlich, K.R. Chan, N. Scotchmer, B. Gocke, E. Biro: Influence of electrode and welding parameters during resistance spot welding of hot-stamped ultra-high strength steel sheets, International Symposium on Advances in Resistance Welding, April 28-30, 2014, Atlanta, USA

2. J. Hou, D. Saha, S.S. Nayak, Y. Zhou, A. Gerlich, K. Chan, N. Scotchmer: Influence of temper pulses on resistance spot welding of hot press forming steels, International Symposium on Advances in Resistance Welding, April 28-30, 2014, Atlanta, USA

3. C.J. Martinez Gonzalez, V.H. Baltazar Hernandez, S.S. Nayak, Y. Zhou: Resistance Spot Welding of TRIP-HSLA Steel Sheets, Sheet Metal Welding Conference XV 2012, October 2-5, Livonia, USA

4. V.H. Baltazar Hernandez, S.S. Nayak, Y. Zhou: TEM study of the tempering of martensite in dual-phase steel under non-isothermal condition, The 22^nd Canadian Materials Science Conference 2010, June 8-13, Waterloo, Canada

5. Pavan Venkatasurya, Venkata Ramuni, Sachin Mali, Jinesh Shah, Sashank Nayak, Devesh Misra, Mahesh Somani, Penti Karjalainen: Deformation Behavior during tensile straining of nano/ultrafine-grained structures formed by reversion in metastable austenitic steels, TMS Annual Meeting & Exhibition 2010, February 14-18, Seattle, USA

6. Sashank Nayak, Sachin Mali, Devesh Misra, Mahesh Somani, Pentti Karjalainen: Mechanical behavior during tensile straining of nano/ultrafine-grained structures formed by reversion in metastable austenitic stainless steels, TMS Annual Meeting & Exhibition 2009, February 15-19, San Francisco, USA

7. Sachin Mali, Mahesh Somani, L.P. Karjalainen, Devesh Misra, Sashank Nayak: Favorable surface adhesion response of electrodeposited nano-hydroxyapatite on ultrafine-grained (UFG)/nano-grained (NG) austenitic stainless steel, MRS Fall Meeting 2008, December 1-5, Boston, USA

8. Devesh Misra, B. Ravi Kumar, Sashank Nayak, Mahesh Somani, Pentti Karjalainen: Deformation behavior during tensile straining of ultrafine/nano-grained structures formed by reversion in metastable austenitic stainless steel, TMS Annual Meeting & Exhibition 2008, March 9-13, New Orleans, USA

9. S.S. Nayak, D.H. Kim, S.K. Pabi, B.S. Murty: Metastable phases in Al-Fe alloys: A study by MA and RSP, The 57^th Annual Technical Meeting of The Indian Institute of Metals 2004, November 17-19, Trivandrum, India

10. S.S. Nayak and B.S. Murty: Development of Al-based nanocrystalline intermetallics and nanocomposites by mechanical alloying, The 15^th Annual General Meeting of the Materials Research Society of India 2004, February 9-11, Varanasi, India

11. S.S. Nayak and B.S. Murty: Synthesis and thermal stability of Ti and Zr-based trialuminides by mechanical alloying, The 56^th Annual Technical Meeting of The Indian Institute of Metals 2003, November 14-16, Kolkata, India

12. S.S. Nayak and B.S. Murty: Al-based nanocomposite with L1₂-Al₃Ti precipitates by mechanical alloying, The 55^th Annual Technical Meeting of The Indian Institute of Metals 2002, November 14-16, Vadodara, India

PROFESSIONAL MEMBERSHIPS

TMS

ASM International

Professional Engineers Ontario (EIT)

American Welding Society

The Indian Institute of Metals

Last updated: February 20, 2014

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