Selektivno lasersko srašćivanje i taljenje metala

undergraduate thesis

• Author: Roman Fraj-Sladoljev
• Mentor: Ana Pilipović (mentor)
• Granter: University of Zagreb; Faculty of Mechanical Engineering and Naval Architecture; Zagreb
• Defense date and country: 2022-09-28, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Mechanical Engineering

Abstract

U okviru ovog završnog rada, uz osnove najraširenijih postupaka 3D tiskanja metala, pobliže su obrađeni postupci selektivnog laserskog srašćivanja te selektivnog laserskog taljenja. Zbog širokog opsega koji parametri prerade navedenih postupaka obuhvaćaju, rad je usredotočen na utjecaj odabira strategije skeniranja na mehanička svojstva tvorevine, odnosno konkretno pritisna svojstva. Napravljena je usporedba dviju strategija skeniranja pod nazivom “NoPattern“ i “Stripes“. S ciljem otvaranja dodatnog područja ispitivanja ispitna tijela nisu izrađena s potpunom gustoćom već je ispitana ćelijasta žiroidna struktura bez vanjske opne. Rezultati su pokazali da odabrane strategije skeniranja 3D tiska nemaju različiti utjecaj na pritisna svojstva ćelijastih tvorevina. Ovim istraživanjem otvoren je put daljnjem ispitivanju parametara oblikovanja ćelijaste strukture: veličini ćelija i debljini stijenke te utjecaju vanjske opne na svojstva tvorevine.

Abstract (english)

In the scope of this thesis, in addition to the basics of the most widespread metal 3D printing technologies in use, selective laser sintering and selective laser melting are covered in closer detail. Due to the wide scope of the process parameters of the aforementioned metal 3D printing technologies, this final work has been focused on the effect of different scanning strategies on mechanical properties, or more precisely compressive properties of 3D printed parts. A comparison has been made between two scanning strategies: NoPattern and Stripes. To examine an additional field of metal 3D printing, a complex gyroid structure without an outer skin has been chosen as the structure of the parts. Comparing the results of both scanning strategies, a conclusion has been made that the scanning strategy did not affect the compressive properties of the chosen cellular structure. With this research, a gate has been opened to further examine the effects of the different design parameters of cellular structure design: cell size and wall thickness as well as the effect on the outer skin.

• Keywords: 3D tisak metala; selektivno lasersko srašćivanje; selektivno lasersko taljenje; strategija skeniranja; pritisna sila; ćelijasta struktura
• Keywords (english): metal 3D printing; selective laser sintering; selective laser melting; scanning strategie; compressive stress; cellular structure
• Language: croatian
• URN:NBN: urn:nbn:hr:235:541719
• Study programme: Title: Mechanical Engineering; Study programme type: university; Study level: undergraduate; Academic / professional title: sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka strojarstva (sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka strojarstva)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2022-09-22 09:02:20