Sökning: "plastic forming"

Visar resultat 6 - 10 av 71 avhandlingar innehållade orden plastic forming.

1. 6. Microstructural Evolution In As-cast Alloys during Plastic Deformation

   Författare :Mitra Basirat; Pär Jönsson; Hasse Fredriksson; Jacques Lacaze; KTH; []
   Nyckelord :plastic deformation; compression test; recrystallization; deformation band; As-cast; microsegregation; carbide dissolution; disordered structure; order disorder transformation; twining; steel; β brass; copper; SRA - E-Science SeRC ; SRA - E-vetenskap SeRC ;

   Sammanfattning : The effect of deformation on microstructural changes in metals and alloys is the subject of considerable practical interest. The ultimate goal is to control, improve and optimize the microstructure and texture of the finished products produced by metal forming operations. LÄS MER

3. 7. On Transfer of Work Material to Tools

   Författare :Jannica Heinrichs; Staffan Jacobson; Urban Wiklund; Uppsala universitet; []
   Nyckelord :Tribology; Friction; Forming; Cutting; Galling; Material transfer; Tribological coatings; Surface finish; Micro mechanisms; Aluminium; Materialvetenskap; Materials Science;

   Sammanfattning : Bulk forming and cutting are widely used to shape metals in industrial production. Bulk forming is characterized by large strains, extensive plastic deformation and large surface expansions. Cutting is characterized by high speeds, high pressures and high temperatures. LÄS MER

4. 8. Modeling the behavior of inclusions in plastic deformation of steels

   Författare :Chunhui Luo; KTH; []
   Nyckelord :Inclusion; Steel; Plastic deformation; Void; Rolling; Forging; Finite element; Mesomechanical approach;

   Sammanfattning : This doctoral thesis presents a modeling method fordemonstrating the behavior of inclusions and their surroundingmatrix during plastic deformation of steels.Inclusions are inescapable components of all steels. LÄS MER

5. 9. On Peritectic Reactions and Transformations and Hot Forming of Cast Structures

   Författare :Hani Nassar; Hasse Fredriksson; Rian Dippenaar; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; peritectic reactions; massive transformations; thermal analysis; Fe-base alloys; steels; growth irregularities; hot forming; compression testing; flow stress; grain size.; Metallurgical manufacturing engineering; Metallurgisk produktionsteknik; Metallurgical process engineering; Metallurgisk processteknik;

   Sammanfattning : This thesis deals with peritectic reactions and transformations that occur during the solidification of many alloys. Peritectics are believed to be a major cause of crack-formation in many steels, thus, good knowledge of the mechanisms by which these phenomena occur is essential for preventing such defects. LÄS MER

7. 10. On large strain theories in sheet metal forming : general theories and numerical considerations with particular emphasis on strain analysis, non-conservative loading and plastic anisotropy

   Författare :Bo Ekmark; Luleå tekniska universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Manufacturing Systems Engineering; Produktionsutveckling;

   Sammanfattning : The fundamentals of continuum mechanics in large strain problems are treated and analysed. Special emphasis is directed to strain analysis in large deformation problems and a comparison between the different types of strain terms is made. LÄS MER