diplomsko delo
Tina Šafarič (Author), Milan Bizjak (Mentor)

Abstract

V sklopu diplomske naloge smo izdelali in okarakterizirali vzorce zlitine Ti6Al4V, izdelane po postopku selektivnega laserskega pretaljevanja (ang. SLM – Selective Laser Melting). SLM nam omogoča izdelavo oblikovno kompleksnih izdelkov, ki jih po klasičnih postopkih preoblikovanja ni mogoče izdelati. Zaradi izredno velikih hitrosti ohlajanja pri postopku SLM pa imajo vzorci drugačne mehanske lastnosti kot če bi bili izdelani po klasičnih metalurških postopkih. Namen diplomske naloge je bil vpogled v mikrostrukturo SLM izdelanih Ti6Al4V vzorcev, povezava mikrostrukture z mehanskimi lastnostmi, ter analiza vpliva toplotnih obdelav na mikrostrukturo in mehanske lastnosti vzorcev. Eksperimentalni del je zaobjemal pripravo vzorcev, detekcijo mikrostrukturnih sprememb z meritvami električne upornosti, toplotne obdelave pri različnih temperaturah in analizo mikrostrukture. Analiza mikrostruktur pri vzorcih, toplotno obdelanih pri različnih temperaturah, pokaže postopen razpad igličaste ?' martenzitne faze v ? in ß fazo. Učinkovitost analize mikrostruktur smo povečali z določitvijo zanimivih stanj vzorcev med toplotno obdelavo iz sprotnih meritev električne upornosti.

Keywords

selektivno lasersko pretaljevanje;Ti6Al4V;toplotna obdelava;mikrostruktura;mehanske lastnosti;

Data

Language: Slovenian
Year of publishing:
Typology: 2.11 - Undergraduate Thesis
Organization: UL NTF - Faculty of Natural Sciences and Engineering
Publisher: [T. Šafarič]
UDC: 669
COBISS: 131733251 Link will open in a new window
Views: 50
Downloads: 16
Average score: 0 (0 votes)
Metadata: JSON JSON-RDF JSON-LD TURTLE N-TRIPLES XML RDFA MICRODATA DC-XML DC-RDF RDF

Other data

Secondary language: English
Secondary title: effect of heat treatments on microstructure and mechanical properties of SLM Ti6Al4V alloy
Secondary abstract: In this work, we studied samples of Ti6Al4V produced by the process of selective laser melting of metal powders. SLM allows the production geometrically complex products that cannot be produced using classical metallurgical processes. Due to the extremely high cooling rates in the SLM process, the samples’ microstructure mechanical properties differ from those of conventionally manufactured Ti6Al4V products. The aim of this thesis was to gain insight into the microstructure of SLM-manufactured Ti6Al4V samples, to investigate the correlation between the microstructure and mechanical properties, and to analyse the influence of heat treatments on the microstructure and mechanical properties of the samples. The experimental part of the work included the preparation of the samples, measurements of electrical resistivity on the sample in the initiate state, heat treatment of the samples at different temperatures, and analysis of the microstructure of all samples. When comparing the microstructures of the samples at different temperatures, we observed the gradual decomposition of the needle-like α' martensite phase into the α- and β- phases. The effectiveness of the microstructural analysis was increased by determining the states of interest of the samples during heat treatment based on the in situ electrical resistivity measurements
Secondary keywords: selective laser melting;Ti6Al4V;heat treatment;microstructure;mechanical properties;
Type (COBISS): Bachelor thesis/paper
Study programme: 0
Embargo end date (OpenAIRE): 1970-01-01
Thesis comment: Univ. v Ljubljani, Naravoslovnotehniška fak., Oddelek za materiale in metalurgijo
Pages: XII, 41 str.
ID: 16525513