Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
The influence of Mn on the microstructure and mechanical properties of Al-Si based alloys containing Fe
Jönköping University, School of Engineering, JTH, Mechanical Engineering.
Jönköping University, School of Engineering, JTH, Mechanical Engineering.
2006 (English)Independent thesis Basic level (degree of Bachelor), 10 points / 15 hpStudent thesis
Abstract [en]

Abstract

The purpose of this research is to investigate the influence of Manganese (Mn) on cast aluminum alloys where a substantial amount of Iron (Fe) is included. Ductility and tensile strength need to be improved in recycled aluminum alloys where greater amounts of Fe are found. Fe is a common impurity and is known to be detrimental to mechanical properties and in order to neutralize the effects of Fe; modifiers such as Mn are added. In this investigation, attempts will be carried out aiming to find the optimal amount of Mn. Other related topics that will be discussed are whether there exists a Mn/Fe ratio which clearly modifies the harmful iron- rich phases and improves the properties for a certain alloy or not. Also, will the heat treatment have a significant effect on mechanical properties? These are some of the questions that will be answered in this paper.

It is hard to find research articles that focus only on the influence of Mn on the microstructure and mechanical properties of Al-Si cast alloys. Much of the work that is already published concerns only a specific alloy and casting method. In this work three different casting processes, sand-, die- and high pressure die-casting, will be simulated by using gradient solidification equipment. Furthermore, the influence of heat treatment on the mechanical properties will be examined.

The results showed that the solidification rate had the biggest impact on the microstructure and mechanical properties of the alloys, where the fastest cooling rate gave the best results. The effect of Mn seems to influence the samples with coarser microstructures significantly where it had time to modify the Iron-rich needles, also called the β-phase. At higher cooling rates the impact of Mn was impeded. It has been observed that a high content of Mn (around 0.6%) needs to be added before the properties start to improve. UTS (Ultimate Tensile Strength) and YS (Yield Strength) are improved while ductility is lowered. Heat treatment did not seem to have any influence on the effects of Mn.

Place, publisher, year, edition, pages
2006. , 50 p.
Keyword [en]
Aluminum, Silicon, Manganese, Casting, Fe, Mechanical Properties, SDAS, Tensile Test, Heat Treatment
National Category
Materials Engineering
Identifiers
URN: urn:nbn:se:hj:diva-377OAI: oai:DiVA.org:hj-377DiVA: diva2:4085
Uppsok
teknik
Supervisors
Examiners
Available from: 2006-06-07 Created: 2006-06-07

Open Access in DiVA

fulltext(24230 kB)4278 downloads
File information
File name FULLTEXT01.pdfFile size 24230 kBChecksum MD5
660a48cf741e3d2121615afb38ae6ca5b4a41884f9b133cab1005c91df5c3ebf18d1056a
Type fulltextMimetype application/pdf

By organisation
JTH, Mechanical Engineering
Materials Engineering

Search outside of DiVA

GoogleGoogle Scholar
Total: 4278 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Total: 835 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf