20.500.12556/RUL-119180 Nadgradnja sistema za lasersko direktno depozicijo kovinskega prahu za namen izdelave funkcionalno gradientnih materialov Upgrade of the system for direct laser deposition of metal powder with an aim to fabricate functionaly graded materials Funkcionalno gradientni materiali (FGM) imajo pomemben potencial na različnih inženirskih področjih kot so orodjarstvo, avtomobilska, letalska in vesoljska industrija ter energetika. Pri izdelavi FGM s procesom laserske direktne depozicije (LDD) je ključnega pomena dovod homogene mešanice prahu na mesto depozicije v ustreznem razmerju masnih deležev izbranih komponent. To zahteva ustrezno nadgradnjo obstoječega sistema za LDD kovinskega prahu. V ta namen smo okarakterizirali odzivni čas diskastega podajalnika ter čas potovanja prahu od diska do mesta depozicije ter preverili sestavo komponent mešanice prahu na mestu depozicije prahu. Na osnovi rezultatov smo prilagodili obstoječi krmilni algoritem. Z nadgrajenim sistemom smo izdelali različne primere tanko stenskih FGM vzorcev iz komponent prahu nerjavnega jekla 316L in inconela 718 ter jih ovrednotili. Iz rezultatov je razvidno, da s tovrstno nadgradnjo dosežemo ustrezna razmerja in primerno homogenost mešanice, ki zagotavljajo izdelavo FGM z željeno materialno sestavo. Functionally graded materials (FGMs) have a high potential in various engineering branches such as toolmaking, energetics, automotive, and aerospace engineering. In fabrication of FGM by laser direct deposition (LDD) it is crucial to deliver homogenous mixture of powders with selected ratios of component mass flow into the deposition spot. For this purpose, the existing LDD system had to be accordingly upgraded. To achieve this, the response time of disc powder feeder and the powder travel time were characterized as well as the composition of the delivered powder was validated. Based on the results, the existing control algorithm was modified. Various examples of thin wall FGM samples composed of stainless steel 316L and Inconel 718 were fabricated with the upgraded LDD system and evaluated. The results have confirmed that using the upgraded system, the predefined ratios and homogeneity of the powder mixture were achieved, assuring fabrication of FGMs with desired material composition properties. funkcionalno gradientni materiali direktna laserska depozicija nerjavno jeklo 316L - inconel 718 sistem za dovajanje prahu sestava komponent prahu functionally graded materials direct laser deposition stainless steel 316L - inconel 718 powder delivery system powder composition true false false [J. Simončič] Slovenski jezik Angleški jezik Magistrsko delo/naloga 2020-09-04 08:31:03 2020-09-04 08:31:06 2023-10-20 12:25:51 0000-00-00 00:00:00 2020 0 Ljubljana 0 XXVI, 73 str., [4] str. pril. 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 621.79:669.058.66(043.2) 223253 28701955 5747.pdf 5747.pdf 1 48B7528DA302EB58CDA0EFEB57FD929C ad5785b6f44dfc26173ee84c1f140d9a4277441d6937b5da4be3b9063dbe5e78 c290568d-a1b9-11eb-a523-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=133871 5748.PDF 5748.PDF 1 5373257FBB2C4FD830A6A185D989040C 8cd90195b91562f986348148cca1f7a491acadb09feb07346d3cee3e4e059f86 c2a3661f-a1b9-11eb-a523-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=133872 Fakulteta za strojništvo 0 0 0