Sökning: "boron steel"

Visar resultat 1 - 5 av 43 avhandlingar innehållade orden boron steel.

  1. 1. A Study on Structural Cores for Lightweight Steel Sandwiches

    Författare :Samuel Hammarberg; Pär Jonsén; Daniel Berglund; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Lightweight; Sandwich; Steel; Energy absorption; Homogenization; Finite element; Hållfasthetslära; Solid Mechanics;

    Sammanfattning : Lightweight materials and structures are essential building blocks for a future with sustainable transportation and automotive industries. Incorporating lightweight materials and structures in today's vehicles, reduces weight and energy consumption while maintaining, or even improving, necessary mechanical properties and behaviors. LÄS MER

  3. 2. Precipitate growth and coarsening in creep resistant chromium steels

    Författare :Ardeshir Golpayegani; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; coarsening; 9-12% chromium steel; growth; APFIM; energy filtered TEM; Boron; precipitates; atom probe field ion microscopy; EFTEM;

    Sammanfattning : .... LÄS MER

  4. 3. Microstructure based modelling of ductile fracture in quench-hardenable boron steel

    Författare :Rickard Östlund; Michael Worswick; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Hållfasthetslära; Solid Mechanics; Centrumbildning - Centrum för högpresterande stål CHS ; Centre - Centre for High Performance Steel CHS ;

    Sammanfattning : Reduction of fuel consumption and emissions by vehicle weight minimization constitute a major driving force for the development of new materials and manufacturing processes in the automotive industry. Simultaneously formed and quenched boron steel components have higher strength to weight ratio than conventional mild steel components. LÄS MER

  5. 4. Novel boron compounds in lubrication

    Författare :Mamoun Taher; Mark Rutland; Luleå tekniska universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Chemistry of Interfaces; Gränsytors kemi;

    Sammanfattning : Lubricants are used to control friction and reduce wear by preventing direct contact between surfaces in a relative motion. Most of the modern lubricants and lubricant additives have been designed and optimized for ferrous materials. LÄS MER

  7. 5. Inclusion Characteristics and Their Link to Tool wear in Metal Cutting of Clean Steels Suitable for Automotive Applications

    Författare :Niclas Ånmark; Andrey Karasev; Pär Göran Jönsson; Thomas Björk; Jinming Zhou; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Tool wear; PCBN; Machinability; Steel; Non-metallic inclusions; Materials Science and Engineering; Teknisk materialvetenskap;

    Sammanfattning : This thesis covers some aspects of hard part turning of carburised steels using a poly‑crystalline cubic boron nitride (PCBN) cutting tool during fine machining. The emphasis is on the influence of the steel cleanliness and the characteristics of non‑metallic inclusions in the workpiece on the active wear mechanisms of the cutting tool. LÄS MER