Empirijska povezanost tvrdoće i vlačne čvrstoće 3D printanih metala

undergraduate thesis

• Title (english): Empirical correlation between hardness and tensile strength of 3D-printed metals
• Author: Nikola Rnjak
• Mentor: Zdravko Schauperl (mentor)
• Mentor: Dalibor Viderščak (komentor)
• Granter: University of Zagreb; Faculty of Mechanical Engineering and Naval Architecture; Zagreb
• Defense date and country: 2025-02-24, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Mechanical Engineering

Abstract

U teorijskom dijelu ovog završnog rada opisana je aditivna proizvodnja, najčešći postupci te
prednosti i nedostaci u odnosu na konvencionalnu proizvodnju. Detaljno su opisani postupci
aditivne proizvodnje metala, princip rada pojedinog postupka te materijali koji se
upotrebljavaju. Opisan je postupak određivanja mehaničkih svojstava koji obuhvaća statičko
vlačno ispitivanje te mjerenje tvrdoće različitim metodama koje se primjenjuju. Prikazani su
dosadašnji rezultati istraživanja u području povezanosti tvrdoće (HV) i vlačne čvrstoće
materijala (Rm).
U eksperimentalnom dijelu rada izrađeni su uzorci upotrebom različitih metalnih materijala (Ti
legura, nehrđajući čelik 316L, Al-legura i maraging čelik MS1) DMLS postupkom, provedena
je analiza mikrostrukture i izmjerena tvrdoća. Na temelju vrijednosti izmjerene tvrdoće (HV1)
i vlačne čvrstoće (Rm) provedena je regresijska analiza te je određena empirijska povezanost
tvrdoće i vlačne čvrstoće DMLS proizvedenih metalnih materijala.

Abstract (english)

In the theoretical part of this Bachleor thesis, additive manufacturing, the most common
processes, their advantages and disadvantages compared to conventional manufacturing are
described. The processes of metal additive manufacturing are explained in detail, including the
working principles of each process and the materials used. The procedure for determining
mechanical properties is described, covering static tensile testing and hardness measurement
using various applicable methods. Previous research results in the field of the correlation
between hardness (HV) and tensile strength (Rm) of materials are presented.
In the experimental part of the thesis, specimens were produced using different metal materials
(Ti alloy, 316L stainless steel, Al alloy, and MS1 maraging steel) through the DMLS process.
Microstructure analysis was conducted, and hardness was measured. Based on the measured
values of hardness (HV1) and tensile strength (Rm), a regression analysis was performed, and
an empirical correlation between the hardness and tensile strength of DMLS-produced metal
materials was determined.

• Keywords: aditivna proizvodnja metala; mehanička svojstva; statičko vlačno ispitivanje; vlačna čvrstoća; tvrdoća; regresijska analiza
• Keywords (english): metal additive manufacturing; mechanical properties; static tensile testing; tensile strength; hardness; regression analysis
• Language: croatian
• URN:NBN: urn:nbn:hr:235:629910
• 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: 2025-02-20 14:44:03