University of Maribor, Faculty of Mechanical Engineering

Smetanova ulica 17, 2000 Maribor

https://www.fs.um.si/

Number of employees: 100

Contact information:

Additve Manufacturing Laboratory

prof. dr. Igor Drstvenšek

igor.drstvensek@um.si

+386 2 220 7593

AM Technologies

Metal AM technologies:

Powder Bed Fusion (PBF):

Selective Laser Melting (SLM)
Electron Beam Melting (EBM)

Directed Energy Deposition (DED):

Wire Arc Additive Manufacturing (WAAM)

List of Metal AM printers:

Dentas LMP200
Freemelt ONE
KUKA robot with MIG attachment

Polymer AM technologies:

Material Extrusion (MEX):

Continuous filament fabrication (CFF)

Powder Bed Fusion (PBF):

Selective Laser Sintering (SLS)

Vat Photopolymerization (VPP):

Stereolithography (SLA)

Materials and characterisation

Materials:

Metals:

Al-alloys, Mg and Mg-Alloys, Ti-Ta alloys, AISI 316L, HEA

Polymers:

PA12, TPU, ABS, PLA, TPU, ASA, PETG, PA-CF, PLA-CF, different resins

Testing equipment:

SEM microscopes
Analitical scales
Mechanical testing machines
Corrosion testing

Post-processing equipment:

Sand blasting
Post curing
Thermal treatment
US-cleaning
Anodisation

Services

Key competences:

20 years of experience in the manufacture of patient-specific medical devices (cranio-maxillofacial implants, hip implants, thoracic implants, surgical guides, communication and surgical models). Research into SLM and EBM process parameters and their influence on the mechanical, metallurgical and chemical properties of the materials.

AM-related projects:

Development of design methods for the production of cranial implants, development of a revision acetabular cup for large defects (Paprosky III) and its clinical testing, development of an in-situ alloying process for Mg-Zn alloys for the production of biodegradable trauma implants.

Key publications and patents:

As-fabricated surface morphologies of Ti-6Al-4V samples fabricated by different laser processing parameters in selective laser melting. Additive manufacturing. [Print ed.]. May 2020, vol. 33 (101147), str. 1-14, ilustr. ISSN 2214-8604. DOI: 10.1016/j.addma.2020.101147
Mechanisms of defect formation in Ti-6Al-4V product during re-melting of layers in selective laser melting. Journal of manufacturing processes. [Online ed.]. 3 Nov. 2023, vol. 105, str. 260-275, ilustr. ISSN 2212-4616. https://dk.um.si/IzpisGradiva.php?id=92144, DOI: 10.1016/j.jmapro.2023.09.044
FANG, Christian, CAI, Hong, KUONG, Evelyn, CHUI, Elvis, CHUEN SIU, Yuk, JI, Tao, DRSTVENŠEK, Igor. Surgical applications of three-dimensional printing in the pelvis and acetabulum: from models and tools to implants. Der Unfallchirurg. [Print ed.]. Mar. 2019, vol. 122, str. 278-285. ISSN 0177-5537. DOI: 10.1007/s00113-019-0626-8
DRSTVENŠEK, Igor, ZUPANIČ, Franc, BONČINA, Tonica, BRAJLIH, Tomaž, PAL, Snehashis. Influence of local heat flow variations on geometrical deflections, microstructure, and tensile properties of Ti-6Al-4 V products in powder bed fusion systems. Journal of manufacturing processes. [Print ed.]. May 2021, vol. 65, str. 382-396. ISSN 1526-6125. DOI: 10.1016/j.jmapro.2021.03.054
DRSTVENŠEK, Igor, STROJNIK, Tadej. Naprava za mikro pozicioniranje instrumenta na stereotaktičnem sistemu : patent : SI 23168 (A), 2011-04-29. Ljubljana: Urad Republike Slovenije za intelektualno lastnino, 2011. ilustr., 21 str. [COBISS.SI-ID 3976511]
patentna družina: WO 2011053259 (A1), 2011-05-05
DRSTVENŠEK, Igor, POGAČAR, Dušan, SEVER, Peter. Šoba z ejektorskim vtokom medija : patent št. SI 23702 (A), 2012-10-30. Ljubljana: Urad RS za intelektualno lastnino, 2012. 16 str. http://worldwide.espacenet.com/publicationDetails/originalDocument?CC=SI&NR=23702A&KC=A&FT=D&ND=3&date=20121030&DB=worldwide.espacenet.com&locale=en_EP, http://worldwide.espacenet.com/publicationDetails/originalDocument?FT=D&date=20121206&DB=worldwide.espacenet.com&locale=en_EP&CC=WO&NR=2012166058A1&KC=A1&ND=4. [COBISS.SI-ID 16418326]
patentna družina: WO2012166058 (A1), 2012-12-06; Patentna prijava št. P-201100128, 2011-04-12

Formal education programmes:

The subject Additive Manufacturing is part of the Curriculae.

Informal trainings:

Please visit the website for more information on informal trainings offered (https://www.fs.um.si/).

Capabilities, activities and services:

Topological optimisation
FEA
Medical implants design for AM

Used software:

CAESS ProTOp
Ansys
Blender
3D Slicer

Focus areas:

Medical implants, support integration for metal products.

Services offered:

Technical Consulting
Access to AM Equipment
Prototyping Services
Design Optimization

Target groups:

Start-ups
Scale-ups
Established SMEs
Large Companies
Research Institutions

Type of services provided on the market:

Prototyping
Tooling
End-use Parts
Spare Parts
Design for AM