Sökning: "solidification"

Visar resultat 1 - 5 av 144 avhandlingar innehållade ordet solidification.

  1. 1. Metal Expansion Penetration During Solidification of Grey Cast Iron

    Författare :Izudin Dugic; Linköpings universitet; []
    Nyckelord :ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Grey cast iron; solidification; solidification modelling; graphite expansion; molar volume; casting simulation; thennal analysis; thermoanalysis cup; casting temperature; inoculation; inoculant; meta! expansion penetration; eutectic cell size.; TECHNOLOGY; TEKNIKVETENSKAP;

    Sammanfattning : The meta! expansion penetration has been examined experimentally. The whole casting process was simulated using a commercial software, in order to investigate the solidification characteristics and the pore formation in the casting studied. LÄS MER

  2. 2. The mechanisms of metal expansion penetration during solidification of grey cast iron

    Författare :Izudin Dugic; Preben Norgaard Hansén; Linköpings universitet; []
    Nyckelord :ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Grey cast iron; solidification; solidification modelling; graphite expansion; molar volume; casting simulation; thermal analysis; thermoanalysis cup; casting temperature; inoculation; inoculant; metal expansion penetration; eutectic cell size; primary austenite; austenite grain; TECHNOLOGY; TEKNIKVETENSKAP;

    Sammanfattning : The production of high quality castings requires the casting surface to be clean and free from defects. One type of defect often found is caused by metal penetration into the sand mould. LÄS MER

  3. 3. Compacted graphite iron : On solidification phenomena related to shrinkage defects

    Författare :Björn Domeij; Attila Diószegi; Babette Tonn; Högskolan i Jönköping; []
    Nyckelord :ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Compacted graphite iron; Spheroidal graphite iron; Solidification; Microsegregation; Porosity; Kompaktgrafitjärn; segjärn; stelning; mikrosegregation; porositet;

    Sammanfattning : An improved understanding of solidification of compacted graphite iron (CGI) is necessary to predict shrinkage related casting defects. Spheroidal graphite is not only found in ductile iron (SGI) but usually also in CGI, but its characteristics and role in this material is less understood. LÄS MER

  4. 4. Defect Formation during Solidification in Grey Iron Castings

    Författare :Lennart Elmquist; Ingvar Svensson; Attila Diószegi; Doru Stefanescu; Högskolan i Jönköping; []
    Nyckelord :ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; Shrinkage Porosity; Grey Iron; Solidification; Nucleation; Primary Austenite; DAAS; Eutectic Cells; Microstructure; Macrostructure; Hot Spot; Oxygen; Hydrogen; Materials science; Teknisk materialvetenskap;

    Sammanfattning : The presence of defects is of major concern in the production of grey iron castings. Some defects are merely an aesthetic problem while others can be detrimental for the performance of the component. Among the several possible defects, shrinkage porosity is one of the more challenging to understand and avoid. LÄS MER

  5. 5. On the solidification of compacted and spheroidal graphite irons

    Författare :Björn Domeij; Attila Diószegi; Jönköping University; []
    Nyckelord :ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Compacted graphite iron; Spheroidal graphite iron; Solidification; Microsegregation; Kompaktgrafitjärn; segjärn; stelning; mikrosegregation;

    Sammanfattning : A good understanding of the solidification process of a cast material is essential to understand how the combination of alloy composition and the casting process variables combines into the solid cast component and its performance. The wrong combination may result in poor performance or casting defects. LÄS MER