DED-LB izdelava in analiza sestave in korozijske odpornosti nanosa SS316L-Fe

Žagar, Žiga (author), Govekar, Edvard (mentor), Kosec, Tadeja (comentor)

Neposredno spajanje SS316L in Ti6Al4V je oteženo zaradi metalurške nezdružljivosti in nastanka krhkih faz. Ena od potencialnih rešitev, ki se navaja v literaturi, je izvedba spoja preko vmesnih nanosov v sestavi SS316L-Fe-Cr-V-Ti6Al4V. V nalogi smo eksperimentalno določili parametre procesa DED-LB in izdelali nanose v sestavi SS316L in Fe na substratu SS304L z višinama posameznih nanosov 0,35 mm in 1,0 mm. Z uporabo SEM/EDS analize je bila okarakterizirana kemijska sestava in korozijska odpornost ter tudi mikrotrdota nanosov. Nanosi višine 0,35 mm so pokazali večjo pretaljenost in mešanje Fe–SS316L z deleži elementov 12,2Cr; 7,1Ni in 0,3Mo tudi na lokaciji blizu površine Fe nanosa ter boljšo korozijsko odpornost, medtem ko so 1,0 mm nanosi dosegli manj izrazito mešanje in posledično slabšo korozijsko odpornost in nižjo mikrotrdoto.

• Language: Slovenian
• Keywords: laserska direktna depozicija (DED-LB), nanos SS316L-Fe, kemijska sestava, korozijska odpornost, mikrotrdota
• Work type: Bachelor thesis/paper
• Typology: 2.11 - Undergraduate Thesis
• Organization: FS - Faculty of Mechanical Engineering
• Place of publishing: Ljubljana
• Publisher: [Ž. Žagar]
• Year: 2026
• Number of pages: XI, 34 f.
• PID: 20.500.12556/RUL-187099
• UDC: 621.793.74:669.14:620.193(043.2)
• COBISS.SI-ID: 290508291
• Publication date in RUL: 09.09.2026

Secondary language

• Language: English
• Title: DED-LB fabrication and analysis of the composition and corrosion resistance of SS316L–Fe coatings

Abstract

Direct joining of SS316L and Ti6Al4V is challenging due to their metallurgical incompatibility and the formation of brittle phases. One of the potential solutions cited in the literature is the fabrication of the joint through interlayers in the composition SS316L-Fe-Cr-V-Ti6Al4V. In this thesis, we experimentally determined the parameters of the DED-LB process and produced deposits in the composition of SS316L and Fe on the SS304L substrate with individual deposit heights of 0,35 mm and 1,0 mm. Using SEM/EDS analysis, the chemical composition and corrosion resistance as well as the microhardness of the deposits were characterized. Deposits with a height of 0,35 mm exhibited higher dilution and more pronounced Fe–SS316L intermixing with elemental contents of 12,2Cr; 7,1Ni and 0,3Mo even at locations close to the surface of the Fe deposit. These deposits also showed better corrosion resistance. In contrast, the 1,0 mm deposits exhibited less pronounced intermixing, resulting in lower corrosion resistance and lower microhardness.

• Keywords: laser direct energy deposition (DED-LB), SS316L-Fe deposition, chemical composition, corrosion resistance, microhardness