Mjerenje brzine ultrazvuka u etalonskim pločicama tvrdoće

undergraduate thesis

• Title (english): Ultrasonic velocity measurements on reference hardness blocks
• Author: Maria Grozdanić
• Mentor: Damir Markučič (mentor)
• Granter: University of Zagreb; Faculty of Mechanical Engineering and Naval Architecture; Zagreb
• Defense date and country: 2019-02-28, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Mechanical Engineering

Abstract

Između ostaloga, nerazorne metode ispitivanja mogu se koristiti i u svrhu karakterizacije materijala i procjene mehaničnih svojstava. U ovom radu naglasak je stavljen na istraživanje mogućnosti određivanje tvrdoće pomoću brzine ultrazvučnih impulsa. U uvodnom pregledu prikazana su dosadašnja istraživanja, analize i rezultati u tom području, na temelju kojih su određeni parametri i osmišljeno ispitivanje na etalonskim pločicama tvrdoće i odabranom uzorku u eksperimentalnom dijelu rada. Dobiveni odnosi brzine ultrazvučnih impulsa i tvrdoće u eksperimentalnom dijelu podudaraju se s rezultatima proučenih istraživanja i mjerenja, uzimajući u obzir određene utjecaje u određenom kontekstu, koji utječu na provođenje ispitivanja kao i dobivene rezultate.

Abstract (english)

Among other things, non-destructive methods ca be used to characterize materials and assess mechanical properties. In this paper accent has been placed on the probability determination of hardness by ultrasonic pulse rate. In an introductory review are presented the research, analysis and results in the field so far, based on which are determined parameters and designed test on hardness blocks and selected sample in experimental part of the paper. The obtained ratio of ultrasound pulses and hardness in the experimental part is consistent with the results of the studied research, taking into account certain influences in a particular context that affect the performance of the test as well as the results obtained.

• Keywords: nerazorna metoda ispitivanja; ultrazvučno ispitivanje; brzina propagacije ultrazvučnih impulsa; tvrdoća; etalonske pločice tvrdoće
• Keywords (english): non-destructive testing; ultrasonic testing; ultrasonic velocity; hardness; hardness blocks
• Language: croatian
• URN:NBN: urn:nbn:hr:235:284390
• Study programme: Title: Mechanical Engineering; Study programme type: university; Study level: undergraduate; Academic / professional title: sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka strojarstva (sveučilišni/a prvostupnik/ prvostupnica (baccalaureus/baccalaurea) inženjer/inženjerka strojarstva)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2019-05-23 00:14:00