DTU Studieprojekt - Accurate measurement of the composition of Fe-C alloys using Optical Emission Spectrometry

Accurate measurement of the composition of Fe-C alloys using Optical Emission Spectrometry

Udbyder
Vejleder
Sted
København og omegn
Background
This is a project for students with interest in experimental work within materials science and metals processing who also would like to do projects in co-operation with the industry.

The most commonly used method to analyse the chemical composition of metals and their alloys is by Optical Emission Spectrometry (OES).

OES instruments are commonly used in the industry and at universities. It is a quick and accurate method. However, the result of OES analysis depends very much on how the sample is taken and conditioned, and on how the individual OES instrument is used, calibrated and maintained. It is generally considered very difficult to correctly analyse the amount of light elements such as C in steel alloys.

The OES method is simple, in priciple: A spark (similar to welding) creates a plasma and the light emitted is analysed for characteristic wavelengths. Each wavelength corresponds to an element and form the relative intensities it is possible to calculate the composition of the alloy analysed.

There is a need for a comparative study of how sampe microstructure and preparation as well as instrument maintenance influence the accuracy of the measurements.

Content
In the project we wish to compare the instrument at DTU to at least one instrument in the industry (at Tasso A/S) and to verify carbon measurements with other analytical methods such as thermal analysis and Leco tests. Instruments form other industries may be brought in if time allows. There is broad industrial interest in this project, so it will relatively easy to bring in more partners.

We will select a limited number of alloys to investigate and produce samples manufactured under different conditions. The samples should be characterised in optical microscope to describe the type and scale of microstructure. The samples will be cut/polished/ground by a nuber of differendt techniques to give a variation in surface texture. Then they will be analysed at DTU and at Tasso, so that we can compare the results. We will compare measurements with reference measurements based on thermal analysis and wet chemical analysis.

Emneord

• Konstruktion og mekanik
• Materialer
• Produktion og ledelse
• Forbrændingsmotorer
• Maskinkonstruktion
• Entreprenørskab
• Innovation og produktudvikling
• Livscyklusanalyse

Navn
Niels Skat Tiedje

Stilling
Lektor

Mail
nsti@mek.dtu.dk

Vejleder-info
Bachelor i Produktion og Konstruktion
Vejleder
Niels Skat Tiedje

ECTS-point
10 - 20

Type
Afgangsprojekt, Bachelorprojekt, Specialkursus

Diplomingeniør, Maskinteknik
Vejleder
Niels Skat Tiedje

ECTS-point
10 - 20

Type
Afgangsprojekt, Bachelorprojekt, Specialkursus