Napetosna korozija metala i metalnih legura

undergraduate thesis

• Title (english): Stress corrosion cracking of metals and metal alloys
• Author: Blanka Krčelić
• Mentor: Anita Begić Hadžipašić (mentor)
• Mentor: Sandra Brajčinović (pomoć pri izradi, neposredni voditelj)
• Committee member: Ljerka Slokar Benić (predsjednik povjerenstva)
• Committee member: Anita Begić Hadžipašić (član povjerenstva)
• Committee member: Ivan Jandrlić (član povjerenstva)
• Granter: University of Zagreb; Faculty of Metallurgy; Sisak
• Defense date and country: 2019-09-30, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Metallurgy

Abstract

Mnoga velika oštećenja metalnih konstrukcija, dijelova strojeva izrađenih od metalnih legura te metala općenito mogu uzrokovati velike probleme u radu, poput zastoja u radu, velikih materijalnih gubitaka, narušavanja zdravlja čovjeka, te kontaminacije sastavnica okoliša. Najčešći razlog oštećenja navedenih metala i metalnih legura je korozija, a kao izuzetno razaran i agresivan oblik korozije koji se odvija prilikom djelovanja nekoliko utjecaja, navodi se napetosna korozija.
Napetosna korozija predstavlja primjer lokalne korozije koji nastaje onda kada je promatrani uzorak istovremeno izložen agresivnom djelovanju medija i naprezanju, što najčešće dovodi do stvaranja pukotina i konačnog loma materijala. Pukotine uzrokovane napetosnom korozijom mogu se širiti transkristalno ili interkristalno, odnosno po površini materijala ili uzduž granica metalnog zrna u dubinu.
U ovom radu istražit će se utjecaji koji dovode do pojave napetosne korozije, kao što su utjecaji naprezanja, okoline, strukture materijala, i drugih koji mogu potaknuti razvijanje i napredovanje navedene korozije. Navesti će se posljedice i moguća oštećenja na metalima i metalnim legurama te metode zaštite metala od napetosne korozije.

Abstract (english)

Many major damages of metal structures, machine parts made of metal alloys and metals generally can cause major problems such as work delays, major material losses, damage of human health, and contamination of environmental components. The most common cause of damage of metals and metal alloys is corrosion, and as a highly destructive and aggressive form of corrosion that occurs during the action of several influences, stress corrosion cracking.
Stress corrosion cracking is an example of local corrosion that occurs when the observed sample is simultaneously exposed to the aggressive action of the media and stress, which most often leads to the formation of cracks and the final fracture of the material. Cracks caused by stress corrosion cracking can be transcrystalline or intercrystalline, i.e. across the surface of the material or along the grain boundaries of the metal into depth.
This paper will investigate the effects that lead to stress corrosion cracking, such as the effects of stress, environment, material structure, and others that can stimulate the development and progression of said corrosion. The consequences and possible damages on metals and metal alloys, as well as the methods of metal protection from stress corrosion cracking will be stated.

• Keywords: napetosna korozija; utjecaj okoline; naprezanje; agresivno djelovanje; pukotine
• Keywords (english): stress corrosion cracking; environmental impact; stress; aggressive action; cracks
• Language: croatian
• URN:NBN: urn:nbn:hr:115:033222
• Study programme: Title: Metallurgy; specializations in: Metallurgical Engineering, Industrial Ecology; Course: Industrial Ecology; Study programme type: university; Study level: undergraduate; Academic / professional title: sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka metalurgije (sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka metalurgije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2019-10-04 10:03:24