Prof Daniël G Hattingh


Director eNtsa/ Professor Mechanical Engineering
eNtsa/Department Mechanical Engineering
041 5043608
North Campus, MTLC Building, Room Nr M038

Biography / Background

I have been an academic in Mechanical Engineering at Nelson Mandela University (previously Port Elizabeth Technikon) since 1989 and was appointed as a full Professor: Mechanical Engineering in 2002. During 2012 I was awarded a Distinguish Professorship for 5 years which was renewed in 2018. My research interests are vested in Solid State Welding as a joining and repair technique and Small Sample Testing (both Static and Creep) as a methodology for assessing remaining life of high value engineering structures. Also active in the field of design for structural integrity, covering the fields of fatigue and fracture, residual stresses, fatigue life prediction and failure analysis. Since 1989 I have variously been lecturer, Senior Lecturer, Program Coordinator for Production Management, Head of Department and Director of eNtsa since 2002, also my current responsibility.  I was educated at Stutterheim High School, Stutterheim, South Africa, hold a N Dip, HN Dip, Masters Dip in Mechanical Engineering from the Port Elizabeth Technikon; a PhD (1998) in Mechanical Engineering from the University of Plymouth, England. Recognition include the nomination as finalist in the 2019 National Science and Technology Forum (NSTF) for Engineering Research Capacity Development, 2011 leader of the team who won the NSTF award “Research for Innovation by an individual or a team through an Organisation/ Institution” category, and 2008 finalist in the category for Recognition for outstanding contribution to Science, Engineering, technology and Innovation also from NSTF. In 2012 was awarded the Southern African Institute of Welding’s Gold Medal in recognition of vision and leadership in developing friction stir welding technology. I am B3 rated researcher with National Research Foundation and hold an appointment from the NRF as a member of the Specialist Committee for Engineering, responsible for overseeing rating applications on a national basis.  Member of the Editorial Board  of the International Journal of Fatigue(Elsevier Science - impact factor in 2019 of 4.369 and ranked 16/130 in Mechanical Engineering by Clarivate Analytics), as well an Editorial Board member of Research and Development Journal of South Africa hosted by the SAIMechE.  I have authored/co-authored numerous research publications in refereed International Journals and Conference Proceedings and presented invited Plenary or Keynote lectures at International Conferences.  I have significant experience of acting as a failure analysis consultant, generating several reports over the last 30 years. My work has ranged over advising on fatigue design, through determining mechanisms and causes of failure in mechanical equipment, plant and structures. Participant in various international Residual Stress experiment at FaME38, the Facility for Materials Engineering at the Institute Laue-Langevin (ILL) and the European Synchrotron Radiation Facility (ESRF), Grenoble, France.

Doctoral of Philosophy (PhD) – 1995 to 1998
Department of Mechanical and Marine Engineering, University of Plymouth, England. Thesis entitled: The Fatigue of Spring Steel (Supervisor Prof.Dr. D Grieve and D Plane) and examiners Prof MN James and Prof G Smith.
Masters Diploma in Technology Mechanical Engineering – 1991 to 1992
Department of Mechanical Engineering, Port Elizabeth Technikon, Port Elizabeth, S.A. Dissertation entitled Axial Flow Fan Selection Program (Supervised by Prof HLT Jeffery and external examiner Mr I Clark)
National Higher Diploma Mechanical Engineering – 1986 to 1987
Port Elizabeth Technikon, Port Elizabeth, SA
National Diploma Mechanical Engineering – 1983 to 1985
Port Elizabeth Technikon, Port Elizabeth, S.A.

Awards and Achievements
2019 Finalist – NSTF Engineering Research Capacity Development Awards
2016 Researcher of the year award: School of Engineering Nelson Mandela University
Distinguished Professor from 2012 to 2017 and 2018 to 2022
2012 Awarded the Southern African Institute of Welding’s Gold Medal in recognition of vision and leadership in developing a friction stir welding technology unit at the Nelson Mandela Metropolitan University
2011 WeldCore® research team won the National Sciences and Technology Forum (NSTF) prize in the category: Research for Innovation by an individual or a team through an Organisation/ Institution
2010 WeldCore® research team won the National Innovation Fund Competition in
Finalist for NSTF award Recognition for outstanding contribution to Science, Engineering, technology and Innovation in 2008

Professional Activities
ECSA - Registered Professional Technologist since 1995 - registration number: 9570064
SAIMechE - Member of the South African Institution of Mechanical Engineers since 1992 - registration number: 080792
2007 to 2015: Review panel member for Materials Research Group at the CSIR
2001 to 2003//2005 –2010//2020 - : Chairman: South African Institute of Mechanical Engineering (SAIMechE) Eastern Cape Branch.  Member of National Council.
Member of the review panel for all THRIP applications in the field of Materials Sciences. THRIP Materials Review Panel Member from 2004 to 2009
Elected to service as an advisory member for the National Standards Generating body for Manufacturing in South Africa:  NSB 06 SAQA/NQF from 2001 to 2004
Member: Advisory Panel – Economic Growth and International Competitiveness Focus Area of the Materials Sub-Focus Area in 2003

Teaching Interests

I am active in curriculum development and teaching undergraduate students. My teaching philosophy is driven by the desire to “convey” my engineering experience in my teaching to the students.  The aim is to assist students with clearly structured stepping-stones of real-life life engineering experience to facilitate the assimilation of an effective but holistic engineering outlook.  I always attempt to incorporate advanced skills in problem definition, analysis, synthesis, and communication. Lately, some emphasis is placed on the human context as far as social demands, ethical considerations, sustainability, and personal responsibility. I strongly believe in a circular linkage between teaching, research, and industrial engagement. I have initiated and led to teaching and learning research initiatives at the university over the past four years funded by the Royal Academy of Engineering (UK) and Department of Higher Education and Training (DHET).  From  2017-2019 a project between Nelson Mandela University, Walter Sisulu University, and the University of Plymouth was completed looking at “A collaborative network to enhance engineering pedagogy using phenomena-based learning and research-led teaching and mentoring”.  These offered engineering academics a powerful opportunity to engage with pedagogic techniques that have proven potential in increasing diversity in the classroom.

  • Learn from direct interaction with UK National Teaching Fellows and Principal Fellows of the UK Higher Education Academy.
  • Benefit from research mentoring aimed at transferring research project leadership skills.
  • Develop enhanced paper writing skills via interactive seminars involving experienced Editors of International Journals.
  • Gain confidence from peer learning via an on-line platform providing web-based learning resources and mediated discussion of teaching and learning techniques and interventions.

Research Interests

My research interest stems mainly from a focus on generating new knowledge that will assist industry with structural integrity, advancing reliability and safety developing alternative, innovative ways in addressing pertinent engineering challenges. The secondary focus is to use this platform for establishing real-world research opportunities for postgraduate students from where they can grow as technological experts in a well-defined field. The work we do is benchmarked through Journal publications, primarily in mainstream and highly reputed international journals with good impact factors in the engineering materials field. The standing of publications by the research group and collaborators I am involved in, is high, with Scopus indicating that top papers cited 70-80 times. Personally, I have a Hscopus Index of 17 and 1048 citations. My current research interest is a follow-on of completed work that was dominated by researching solid-state welding techniques, followed by developing a suitable sample extraction and repair technique now applied under the banner of WeldCore® which includes core sampling and a Friction Taper Hydro Pillar Process repair. Currently, research is focused on developing Small punch testing techniques for creating and understating within Static and Creep regimes of aged material extracted from operating plants.  The small punch static research is focused at deriving “critical strain energy density” values to assist with investigating, qualitatively, the initiation fracture toughness on service exposed material.  Small punch creep test work is focussing on platform development as well as assisting with accelerated creep studies to do some prediction or estimation of remaining structural plant life. This work is very much driven by industry demand with the main advantage of SPCT being imbedded in obtaining useful load/time/temperature-dependent data from a small volume of material in a shorter time than conventional tests. Small sample test data will inform engineering decision as it is extracted, in situ, in small volumes from operating plant at the point of interest.  The ability to remove a representative sample and effect an accepted weld repair, has highlighted small sample testing as an attractive methodology upon which to base engineering decisions with respect to component integrity and remnant life of components.

Representative Publications

Guest Edited Journal Special Issues

G.01 21st European Conference on Fracture, Susmel, L., Carpinteri, A., Hattingh, D.G., Bozic, Z., Angelova, D. 2018 Engineering Failure Analysis, 83, pp. 239 0.
Invited Book Chapters
A.1 M N James, D G Hattingh, H Lombard, D L H Bulbring, A Els-Botes and A Steuwer (2010), Failure mechanisms in friction stir welds, Failure Mechanisms of Advanced Welding Processes, ed. X Sun, Woodhead Publishing, Sawston, Cambridge, Chapter 7, pp.164-189 ISBN 978-1-84569-536-1.
A.2 M N James, W H Rall, D G Hattingh and A Steuwer (2011), Assessing residual stresses in predicting the service life of welded structures, Fracture and fatigue of welded joints and structures, ed. K A Mcdonald, Woodhead Publishing, Sawston, Cambridge, Chapter 10, pp.276-296 ISBN 978-1-84569-513-2.
A.3 D T Asquith, A Yerokhin, D J Hughes, D G Hattingh, M N James and J R Yates, (2013), Depth resolved measurement of the 3D residual stress state in surface engineered aluminium by synchrotron diffraction, X-Ray Diffraction: Structure, Principles and Applications, ed. K. Shih, Nova Publishing, Chapter 9, pp.207-222 978-1-62808-591-4.

Selected Journals Papers

B1. M N James, D G Hattingh and G R Bradley (2003), Weld tool travel speed effects on fatigue life of friction stir welds in 5083 aluminium, International Journal of Fatigue, 25 pp.1389-1398 ISSN 0142-1123.  doi:10.1016/S0142-1123(03)00061-6  
B2. D J Hughes, M N James, D G Hattingh and P J Webster (2003), The use of combs for evaluation of strain-free references for residual strain measurements by neutron and synchrotron X-ray diffraction, Journal of Neutron Research, 11 No. 4 December 2003 pp.289-293 ISSN 1023-8166.
B3. M N James, D J Hughes, D G Hattingh, G R Bradley, G Mills, and P J Webster (2004), Synchrotron diffraction measurement of residual stresses in friction stir welded 5383-H321 aluminium butt joints and their modification by fatigue cycling, Fatigue and Fracture of Engineering Materials and Structures, 27 pp.187-202 ISSN 0160-4112. 
B4. C Blignault, D G Hattingh, G H Kruger, T I van Niekerk and M N James (2008), Friction stir weld process evaluation by multi-axial transducer, Measurement: Journal of the International Measurement Confederation 41 No. 1 pp.32-43 ISSN 0263-2241.  doi:10.1016/j.measurement.2006.12.001
B5. D G Hattingh, C Blignault, T I van Niekerk, and M N James (2008), Characterization of the influences of FSW tool geometry on welding forces and weld tensile strength using an instrumented tool, Journal of Materials Processing Technology 203 No. 1-3 pp.46-57 ISSN: 0924-0136.  doi:10.1016/j.jmatprotec.2007.10.028
B6. M N James, D J Hughes, D G Hattingh, G Mills, P J Webster (2009), Residual stress and strain in MIG butt welds in 5083-H321 aluminium: as-welded and fatigue cycled, International Journal of Fatigue 31 pp.28-40 ISSN 0142-1123.   doi:10.1016/j.ijfatigue.2008.04.010
B7. H Lombard, D G Hattingh, A Steuwer, M N James (2009), Effect of process parameters on the residual stresses in AA5083-H321 friction stir welds, Materials Science and Engineering A, 501 pp.119-124 ISSN 0921-5093.  doi:10.1016/j.msea.2008.09.078 
B8. M N James, M Newby, D G Hattingh, A Steuwer (2010), Shot-peening of steam turbine blades: Residual stresses and their modification by fatigue cycling, Procedia Engineering, 2 No. 1 pp.441-451 ISSN 1877-7058.   doi:10.1016/j.proeng.2010.03.048 
B9. D G Hattingh, D L H Bulbring, A Els-Botes, M N James (2011), Process Parameter Influence on Performance of Friction Taper Stud Welds in AISI 4140 Steel, Materials and Design 32 pp.3421-3430 ISSN 0261-3069.  doi:10.1016/j.matdes.2011.02.001 
B10. C Blignault, D G Hattingh and M N James (2012), Optimising friction stir welding via statistical design of tool geometry and process parameters, Journal of Materials Engineering and Performance 21 No. 6 pp.927-935 ISSN 1059-9495.  doi: 10.1007/s11665-011-9984-2
B11. A Steuwer, D G Hattingh, M N James , U Singh, and T Buslaps (2012), Residual stresses, microstructure and tensile properties in Ti-6Al-4V friction stir welds, Science and Technology of Welding and Joining 17, No. 7, October 2012 pp. 525-533 ISSN 1362-1718.
B12. D G Hattingh, M N James, L Susmel and R Tovo (2015), Multiaxial fatigue of aluminium friction stir welded joints: preliminary results, Frattura ed Integrità Strutturale (Fracture and Structural Integrity), International Journal of the Italian Group on Fracture, 33 pp.382-389 ISSN 1971-8993.
B13. D G Hattingh, L von Weilligh, W Thomas and M N James (2015), Friction processing as an alternative joining technology for the nuclear industry, Journal of The Southern African Institute of Mining and Metallurgy, 115 pp.1-10 ISSN 0038-223X.
B14. D G Hattingh M N James, M Newby, R Scheepers and P Doubell (2016), Damage assessment and refurbishment of steam turbine blade/rotor attachment holes, Theoretical and Applied Fracture Mechanics, 83 pp.125-134 ISSN: 0167-8442.
B15. D G Hattingh, L G von Wielligh, D Bernard, L Susmel, R Tovo, and M N James (2016), Semiautomatic Friction Stir Welding of 38 mm OD 6082-T6 Aluminium Tubes, Journal of Materials Processing Technology, 238 pp.255-266 ISSN: 0924-0136.  doi:10.1016/j.jmatprotec.2016.07.027
B16. M N James, D G Hattingh, D Asquith, M Newby and P Doubell (2016), Applications of residual stress in combatting fatigue and fracture, Procedia Structural Integrity 2 pp.11-25 ISSN: 2452-3216.
B17. E Maggiolini, R Tovo, L Susmel, M N James and D G Hattingh (2016), Crack path and fracture analysis in FSW of small diameter 6082 aluminium tubes under tension-torsion loading, International Journal of Fatigue 92 Part 2 pp.478-487 ISSN: 0142-1123.

B18. L Susmel, D G Hattingh, M N James and R Tovo (2016), Multiaxial fatigue assessment of friction stir welded tubular joints of Al 6082-T6, accepted by the International Journal of Fatigue ISSN: 0142-1123.
B19. M N James, D Hattingh, D Asquith, M Newby and P Doubell (2017), Residual stresses in condition monitoring and repair of thermal power generation components, accepted by Theoretical and Applied Fracture Mechanics ISSN: 0167-8442.
B20. H B van der Merwe, M N James, D G Hattingh and W Rall (2019), Fatigue life prediction for rotary friction welded Ti-6Al- 4V under variable amplitude fatigue loading, Theoretical and Applied Fracture Mechanics, 104 102321.
B21. E Maggiolini, D Benasciutti, L Susmel, DG Hattingh, MN James, R Tovo, Friction stir welds in aluminium: Design S-N curves from statistical analysis of literature data (2018) Fatigue and Fracture of Engineering Materials and Structures, 41 (11), pp. 2212-2230
B22. D Bernard, D G Hattingh, W E Goosen and M N James (2020), High speed FS welding of 5182-H111 alloy - temperature  and microstructural insights into deformation mechanisms, Metals and Materials International. 020-00622-y