Vpliv postopka celjenja na površinske mehanske lastnosti samocelitvenih materialov

zaključna naloga Razvojno raziskovalnega programa I. stopnje Strojništvo

Anže Žibrik (Author), Lidija Slemenik Perše (Mentor)

Abstract

Samocelitveni materiali so sintetično pridobljeni materiali, ki so zmožni popraviti deformacije in ohraniti funkcionalnost po degradaciji ali poškodbi.Taki materiali se dandanes uporabljajo že na mnogih področjih npr. gradbeništvu, avtomobilski industriji, vesoljski tehnologiji,... Dejstvo je, da se takim materialom skozi njihovo uporabo spreminjajo mehanske lastnosti, kar ima lahko velik vpliv na življensko dobo izdelka. V ta namen smo v tej zaključni nalogi ugotavljali, kako se spreminjajo površinske mehanske lastnosti samozacelitvenih materialov glede na število ciklov celjenja.Poleg tega smo proučevali tudi spremembe površinskih mehanskih lastnosti tudi glede na vsebnost komponent, iz katerih je posamezni matterial narejen, saj ima to lahko pomemben vpliv na odločanje ali je nek material uporaben za določen izdelek ali ne. Devetim vzorcem smo v treh ciklih določili površinski modul elastičnosti in trdoto. Cikel je bil sestavljen iz nanoindentacijskih meritev ter analize dobljenih podatkov, mikroskopiranja in zajemanja optičnih slik ter gretja v peči. Rezultati so pri večini vzorcev pokazali, da se s številom ciklov modul elastičnosti zmanjša, trdota pa povečuje. Izkazalo se je tudi, da je sprememba modula elastičnosti največja pri vzorcih z manjšo vsebnostjo Diels-Alderjevih kompoent, sprememba trdote pa pri tistih z večjo vsebnostjo Diels-Alderjevih komponent.

Keywords

diplomske naloge;samocelitveni material;nanoindentacija;modul elastičnosti;trdota;površina;Diels-Alderjeva reakcija;

Data

Language:	Slovenian
Year of publishing:	2018
Typology:	2.11 - Undergraduate Thesis
Organization:	UL FS - Faculty of Mechanical Engineering
Publisher:	[A. Žibrik]
UDC:	620.178(043.2)
COBISS:	16418075
Views:	1260
Downloads:	332
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	English
Secondary title:	Influence of the healing process on the surface mechanical properties of self-healing materials
Secondary abstract:	Self-healing mterials are synthetically created substances that have the ability to repair themselves and recover functionality after degradation, damage and failure. Today, these materials are used in many fields such as civil engineering, automotive industry, aviation,... However, it is also well known, that through their application, they are experiencing changes in mechanical properties, which have a huge impact on the life-time of the product. In the present work were investigating, how the surface mechanical properties of these materials are changing with the healing cycles. Moreover, the influence of the component of which these materials are made of, was studied too. We were measuring elastic modulus and hardness of nine samples, through three cycles of healing process. One cycle included nanoindentation measurement and data analysis, microscopy and optical imaging and heating. The result shown a decrease of elastic modulus and increase of hardness over the cycles of healing. Moreover, the change of elastic modulus was higher for the samples with less DielsAlder components, while the changes in hardness were higher for the samples with higher amount of Diels-Alder components.
Secondary keywords:	Self-healing material;nanoindentation;elastic modulus;hardness;surface;Diels-Alder reaction;
Type (COBISS):	Final paper
Study programme:	0
Embargo end date (OpenAIRE):	1970-01-01
Thesis comment:	Univ. v Ljubljani, Fak. za strojništvo
Pages:	XIV, 31 f.
ID:	10959168