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Investigation of the Drawbacks in the Aluminium Alloys Casting Process
Mid Sweden University, Faculty of Science, Technology and Media, Department of Natural Sciences.
2017 (English)Licentiate thesis, comprehensive summary (Other academic)
Place, publisher, year, edition, pages
Sundsvall: Mid Sweden University , 2017. , p. 49
Series
Mid Sweden University licentiate thesis, ISSN 1652-8948 ; 133
National Category
Materials Engineering
Identifiers
URN: urn:nbn:se:miun:diva-32675ISBN: 978-91-88527-22-6 (print)OAI: oai:DiVA.org:miun-32675DiVA, id: diva2:1174130
Presentation
2017-10-05, o111, Sundsvall, 10:00 (English)
Supervisors
Available from: 2018-01-15 Created: 2018-01-15 Last updated: 2018-01-15Bibliographically approved
List of papers
1. Casting practices influencing inclusion distributions in billets
Open this publication in new window or tab >>Casting practices influencing inclusion distributions in billets
2013 (English)In: Light Metals, ISSN 0147-0809, p. 987-991Article in journal (Refereed) Published
Abstract [en]

A macro-etching method has been used to analyze the distribution and amount of inclusions along billets and on cross sections. Main parameters that have been varied are holding time before casting and amount of liquid remaining after casting. The result show that short holding times, in the order of 10 minutes, give increased amount of inclusions in the beginning of the billets, but holding times in the range from 30 to 60 minutes do not show any significant differences. If the melt remaining in the furnace after casting is less than about 3000 kg, the inclusion density increases towards the end of the ingots. The distribution of inclusions over the cross section of billets show that most inclusions are found in the centre of the billets, however, at increased total amount of inclusions, they tend to appear evenly over the whole cross sections. The results are discussed based on convection in furnace and settling rates and convection at solidification front.

Keyword
Holding time, Inclusion distribution, Remaining melt, Settling velocity
National Category
Materials Engineering
Identifiers
urn:nbn:se:miun:diva-18974 (URN)2-s2.0-84876054446 (Scopus ID)9781118605721 (ISBN)
Conference
Light Metals 2012 - TMS 2013 Annual Meeting and Exhibition; San Antonio, TX; United States; 3 March 2013 through 7 March 2013; Code 96505
Note

Source: Scopus

Available from: 2013-05-22 Created: 2013-05-22 Last updated: 2018-01-15Bibliographically approved
2. Segregation during metal sampling
Open this publication in new window or tab >>Segregation during metal sampling
2014 (English)In: Materials science forum, Trans Tech Publications Inc., 2014, p. 83-88Conference paper, Published paper (Refereed)
Abstract [en]

In order to obtain accurate chemical compositions in as-cast billets and ingots the sampling methods for the analysis have to give reproducible results with high precision. OES analysis made on samples at certain milling depths does not always show the desired nominal composition, and especially the macro segregation profiles within the samples can show significant variations. The present work examine the influence of main sampling parameters, such as the volume of the melt, the melt temperature, the mould design and the method of filling the mould, on the segregation. The results point out the importance of the convection in the mould during solidification, and thus the technique of pouring the melt into the sampling mould. © (2014) Trans Tech Publications, Switzerland.

Place, publisher, year, edition, pages
Trans Tech Publications Inc., 2014
Keyword
Chemical composition, Milling depth, Sampling parameters, Segregation
National Category
Materials Engineering Chemical Sciences
Identifiers
urn:nbn:se:miun:diva-22636 (URN)10.4028/www.scientific.net/MSF.794-796.83 (DOI)000348897900014 ()2-s2.0-84904391301 (Scopus ID)9783038351207 (ISBN)
Conference
14th International Conference on Aluminium Alloys, ICAA 2014; Trondheim; Norway; 15 June 2014 through 19 June 2014; Code 106364
Note

CODEN: MSFOE

Available from: 2014-09-19 Created: 2014-08-20 Last updated: 2018-01-15Bibliographically approved
3. Study of manganese dissolution in aluminum melts
Open this publication in new window or tab >>Study of manganese dissolution in aluminum melts
2016 (English)In: TMS Light Metals, Minerals, Metals & Materials Society, 2016, p. 731-736Conference paper, Published paper (Refereed)
Abstract [en]

Problems with the yield during Mn alloy additions and the occurrence of undissolved Mn rich phases in as cast material containing Ti is the background to the present study of the dissolution of Mn compacts in aluminum melts. The dissolution rate of Mn in liquid aluminum, have been studied in pure Al and in Al-0.12%Ti melts. It was found that Ti additions to the melt decreased the dissolution rate of Mn compacts. It was also shown that the intermediate phases formed at the interface between Mn and liquid aluminum was different after small Ti additions. Moreover, an undissolved Mn briquette, found after casting in a furnace, was examined and the conditions for this to happen have been discussed. The discussion was based on calculations of heat balances during the initial dissolution steps and studies of the transformations occurring within the briquette.

Place, publisher, year, edition, pages
Minerals, Metals & Materials Society, 2016
Keyword
Dissolution rate, Freeze-on layer, Heat transportation, Intermetallic phases, Manganese briquette
National Category
Materials Engineering
Identifiers
urn:nbn:se:miun:diva-28496 (URN)2-s2.0-84974604002 (Scopus ID)9781119225799 (ISBN)
Conference
Light Metals 2016 - TMS 2016: 145th Annual Meeting and Exhibition; Music City Center, Nashville; United States; 14 February 2016 through 18 February 2016; Code 121631
Note

Scopus ID for book chapter: 2-s2.0-84982238790

Available from: 2016-07-22 Created: 2016-07-21 Last updated: 2018-01-15Bibliographically approved

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Razaz, Ghadir

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