Zaznavanje mikrostrukturnih sprememb med toplotno obdelavo hitro strjene zlitine Al-Ti-V-Fe z meritvijo električne upornosti

diplomsko delo

Blaž Grobiša (Author), Milan Bizjak (Mentor)

Abstract

Osnovni namen diplomske naloge je bila izdelava in karakterizacija hitro strjenih trakov zlitine Al-Ti-V-Fe. Hitro strjene trakove smo izdelali po postopku hitrega strjevanja na vrtečem se valju. S to tehnologijo lahko dosežemo velike ohlajevalne hitrosti (med 105 in 106 K/s) in s tem velike hitrosti strjevanja. Karakteristične temperature mikrostrukturnih sprememb hitro strjenih trakov smo določili z meritvami električne upornosti in DSC analizo. Pomagali smo si tudi s programom Thermo Calc, s pomočjo katerega smo izdelali ravnotežni fazni diagram za našo zlitino. Za karakterizacijo mikrostrukture smo uporabili vrstično elektronsko mikroskopijo (SEM) in EDXS analizo. Za boljšo interpretacijo rezultatov smo izmerili tudi Vickersovo mikro trdoto na vzorcih pred in po toplotni obdelavi. Cilj raziskav je bil razložiti mikrostrukturne spremembe med vzorcem v litem stanju in toplotno obdelanim vzorcem.

Keywords

aluminijeve zlitine;hitro strjevanje na vrtečem se valju;mikrostruktura;električna upornost;

Data

Language:	Slovenian
Year of publishing:	2023
Typology:	2.11 - Undergraduate Thesis
Organization:	UL NTF - Faculty of Natural Sciences and Engineering
Publisher:	[B. Grobiša]
UDC:	669
COBISS:	160991491
Views:	29
Downloads:	6
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	English
Secondary title:	detection of microstructural changes during heat treatment of rapid solidification Al-Ti-V-Fe alloy by measuring electrical resistance
Secondary abstract:	The basic purpose of the diploma work was to produce and characterize rapidly solidified Al-Ti-V-Fe alloy ribbons. The rapidly solidified ribbons were produced using the melt spinning method. This technology can achieve high cooling speeds (between 105 and 106 K/s) and, thus, high solidification speeds. The characteristic temperatures of the microstructural changes of the rapidly solidified ribbons were determined by electrical resistance measurements and DSC analysis. We also used Thermo Calc program to help us create an equilibrium phase diagram for our alloy. Scanning electron microscopy (SEM) and EDXS analysis were used to characterize the microstructure. We also measured the Vickers microhardness on the samples before and after heat treatment to interpret the results better. The research aimed to explain the microstructural changes between the as-cast and heat-treated samples.
Secondary keywords:	aluminum alloys;rapid solidification;melt spinning;microstructure;electrical resistivity;
Type (COBISS):	Bachelor thesis/paper
Study programme:	0
Thesis comment:	Univ. v Ljubljani, Naravoslovnotehniška fak., Oddelek za materiale in metalurgijo
Pages:	X, 38 f.
ID:	19542400