Utjecaj valjanja i toplinske obrade na svojstva Cu-Al-Mn legure s prisjetljivosti oblika

master's thesis

• Title (english): The effect of rolling and heat treatment on properties of Cu-Al-Mn shape memory alloys
• Author: Magdalena Selanec
• Mentor: Stjepan Kožuh (mentor)
• Committee member: Mirko Gojić (predsjednik povjerenstva)
• Committee member: Stjepan Kožuh (član povjerenstva)
• Committee member: Tamara Holjevac-Grgurić (član povjerenstva)
• Granter: University of Zagreb; Faculty of Metallurgy; Sisak
• Defense date and country: 2017-09-29, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Metallurgy

Abstract

U radu su istraživana svojstva Cu-8,3%Al-9,4%Mn (mas.%) legure s prisjetljivosti oblika,
nakon toplog i hladnog valjanja. Šipka promjera 8 mm iz Cu-Al-Mn legure, proizvedena je
postupkom vertikalnog kontinuiranog lijevanja. Nakon lijevanja provedeno je toplo i hladno
valjanje. Toplim valjanjem dobivena je traka debljine 1,75 mm, a hladnim valjanjem traka
debljine 1,02 mm. Nakon postupka valjanja uslijedila je toplinska obrada. Toplinska obrada se
sastojala od žarenja na 900° C, držanja 30 minuta na toj temperaturi te hlađenja u vodi.
Karakterizacija mikrostrukture ispitivane Cu-Al-Mn legure provedena je pomoću optičke
mikroskopije (OM) i pretražne elektronske mikroskopije (SEM) opremljene uređajem za
energetsko disperzijsku spektroskopiju (EDS). Temperature transformacije i fuzijske entalpije
određene su diferencijalno skenirajućom kalorimetrijom (DSC). Tvrdoća Cu-Al-Mn legure
prije i nakon valjanja i toplinske obrade određena je Vickersovom metodom (HV10).

Abstract (english)

In the paper, the properties of Cu-8.3%Al-9.4%Mn (wt.%) of shape memory alloy were
investigated after hot and cold rolling. The 8 mm diameter rod of Cu-Al-Mn alloy was
produced by vertical continuous casting. After casting, hot and cold rolling was carried out.
Hot rolling produced a strip of 1.75 mm thick and a cold rolling strip of 1.02 mm thick. After
the rolling process was followed by heat treatment. Heat treatment consisted of annealing at
900 °C, holding for 30 minutes at that temperature and cooling in water. Characterization of
the microstructure of the Cu-Al-Mn alloy was performed by optical microscopy (OM) and
scanning electron microscopy (SEM) equipped with energy dispersive spectroscopy (EDS).
Temperature transformation and fusion enthalpy were determined by differential scanning
calorimetry (DSC). The hardness of Cu-Al-Mn alloys before and after rolling and heat
treatment was determined by the Vickers method (HV10).

• Keywords: legure s prisjetljivosti oblika; Cu-Al-Mn legura; toplinska obrada; valjanje; mikrostruktura; tvrdoća
• Keywords (english): shape memory alloys; Cu-Al-Mn alloy; heat treatment; rolling; microstructure; hardness
• Language: croatian
• URN:NBN: urn:nbn:hr:115:584565
• Study programme: Title: Graduate study program Metallurgy; Study programme type: university; Study level: graduate; Academic / professional title: magistar/magistra inženjer/inženjerka metalurgije (magistar/magistra inženjer/inženjerka metalurgije)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2017-10-24 06:50:58