Lecturer and Chairperson
Department of Mechanical and Manufacturing Engineering
Primary Discipline: Mechanical Engineering; Solid and Structural Mechanics; Material Science and Engineering; Numerical Modelling and Simulation; Fracture Mechanics; Additive manufacturing.
Degrees Degrees Awarded: [Note: List highest degree awarded first]
- Doctor of Engineering in Mechanical Engineering (D.Eng. Mech.Eng.)- Central University of Technology, Freestate South Africa - 2021
- Master of Engineering in Mechanical Engineering (M. Eng. Mech. Eng.) – cum laude - Central University of Technology, Freestate South Africa – 2019
- Bachelor of Engineering in Mechanical Engineering (B.Eng.Mech. Eng.)- first class of honors. Technical University of Kenya – 2015.
Other Credentials/Recognitions & Awards Other Specialized Training
- Trained on Water Purification and De-centralized Solutions- German Water Partnership (GWP) in cooperation with Kenya Water Institute (KEWI).
Current Professional/Scientific Interests, Memberships, and Activities:
Registrated as a Graduated Mechanical Engineer: No. B18667 - Engineers Board of Kenya (EBK).
Research, Scholarly, Professional and Scientific Activities
Presented Conference Papers
- A. M. Muiruri, M. Maringa, W. B. du. Preez, L. M. Masu, “Dynamic behaviour of direct metal laser sintered Ti-6Al-4V (ELI) under high strain rates in compression loading”, Rapdasa International Conference Proceedings Durban, South Africa, pp.165-180: ISBN: 978-0-620-77329-4.
- A. M. Muiruri, M Maringa, W B du Preez & LM Masu, “Effect of Stress Relieving Heat Treatment on High Strain Rate Tensile Properties of Direct Melting Laser Sintered (DMLS) Parts”, 7th International Conference on Competitive Manufacturing (COMA-19), January 30 - February 1, 2019, Wallenberg Centre (STIAS), Stellenbosch, South Africa. ISBN No: 978-0-7972-1779-9.
- A. M. Muiruri, M Maringa & W B du Preez, “Constitutive Numerical Modelling in Additive Manufacturing: Challenges in Predicting the Yield Strength and Flow Properties of Alloys”, Rapdasa International Conference Proceedings, 06 – 08 November 2019, Emoya Estate, Bloemfontein, South Africa, pp. 190-203. ISBN 978-0-6398390-0-4.
- A.M. Muiruri, M. Maringa & W.B.du, Preez, “Application of Phenomenological Modelling in the Development of a Database for Additively Manufactured Ti6Al4V (ELI): A Review” 10th International Conference of the African Materials Research Society (AMRS2019), 10 – 13 December 2019 Arusha, Tanzania.
- Amos Muiruri; Maina Maringa; Willie du Preez. ‘Theoritical model of the flow properties of post processed direct metal laser sintering Ti6Al4V’ 6th World Congress on Integrated Computational Materials Engineering (ICME 2022): On-Demand Oral Presentations, Hyatt Regebcy Lake Tahoe, Nevada, USA, April 24- 25, 2022 http://www.programmaster.org/PM/PM.nsf/ViewSessionSheets?OpenAgent&ParentUNID=75AB275E59AC7CE9852587C100531136
Published Journal papers
- A M Muiruri, M Maringa, W B du Preez, L M Masu, “ Variation of impact toughness of as-built DMLS Ti6Al4V (ELI) specimens with temperature”, South African Journal of Industrial Engineering, November 2018 Vol 29(3) special edition, pp 284-298. ISSN 224-7890.
- A M Muiruri, M Maringa, W B du Preez & LM Masu, “Effects of Stress-Relieving Heat Treatment on Impact Toughness of Direct Metal Laser Sintering (DMLS)-Produced Ti6Al4V (ELI) Parts”, JOM (2019) doi:10.1007/s11837-019-03862-5
- Amos Muiruri, Maina Maringa, Wille du Preez and Leonard Masu, “Effect of stress-relieving heat treatment on the high strain rate dynamic compressive properties of Additively Manufactured Ti6Al4V(ELI)”, Metal, 2020, 10(5), 653. doi:org/10.3390/met10050653.
- Amos Muiruri, Maina Maringa, Willie du Preez, “Crystallographic texture analysis of as- built and heat-treated Ti6Al4V (ELI) produced by Direct Metal Laser Sintering”, Crystals 2020, 10, 699; doi:10.3390/cryst10080699
- Amos Muiruri, Maina Maringa, Willie du Preez, “Evaluation of dislocation densities in various microstructures of additively manufactured Ti6Al4V(ELI) by the method of X-ray diffraction”, Materials 2020, 13, 5355; doi:10.3390/ma13235355
- Muiruri, A., Maringa, M., du Preez, W. High strain rate properties of various forms of Ti6Al4V(ELI) produced by direct metal laser sintering. Applied Sciences 2021, 11(17), 8005; doi.org/10.3390/app11178005
- Muiruri, A.; Maringa, M.; Preez, W.d. Validation of a Microstructure-Based Model for Predicting the High Strain Rate Flow Properties of Various Forms of Additively Manufactured Ti6Al4V(ELI) Alloy. Metals 2021, 11, 1628. https://doi.org/10.3390/met11101628
- Muiruri, A.; Maringa, M.; du Preez, W. Development of VUMAT and VUHARD Subroutines for Simulating the Dynamic Mechanical Properties of Additively Manufactured Parts. Materials 2022, 15, 372. https://doi.org/10.3390/ma15010372
- Muiruri, A.; Maringa, M.; Preez, W.d. Numerical Simulation of High Strain Rate and Temperature Properties of Laser Powder Bed Fusion Ti6Al4V(ELI) Determined Using a Split Hopkinson Pressure Bar. Materials 2022, 15, 1872. https://doi.org/10.3390/ma1505187
- Muiruri, A.; Maringa, M.; du Preez, W. Statistical Analysis of the Distribution of the Schmid Factor in As-Built and Annealed Parts Produced by Laser Powder BedFusion. Crystals 2022, 12, 743. https://doi.org/10.3390/cryst12050743
- Muiruri, A.; Maringa, M.; du Preez, W. Quasi-Static Mechanical Properties of Post-Processed Laser Powder Bed Fusion Ti6Al4V(ELI) Parts under Compressive Loading. Appl. Sci. 2022, 12, 9552. https://doi.org/10.3390/app12199552
Supervision and co-supervision of post graduate students.
Masters students, titles of their dissertations and status
- Mr. Ignatius Chibinyani - Topology Optimization of Hierarchical Honeycomb Structures to Reduce Stress Concentration, Deformation, and Deflection- Ongoing.
- Mr. Tumelo Moloi - Elevated Temperature and Temperature-Dependence of the Fatigue Behaviour of Additively Manufactured Titanium Ti6Al4V and TC18 (Ti–5Al–5Mo–5V–1Cr–1Fe) - Ongoing.
- Mr Philip Mokoena – Deformation and dislocation analysis of Laser Powder Bed Fusion parts for aircraft applications. Ongoing.
Ongoing Research
Additive manufacturing of lightweight alloys: A focus in demanding structural application.
Contacts
Personal contact: +254796364091/ +27630141847
Email address: amuiruri@seku.ac.ke or amos.mwangi.muiruri@gmail.com