Sökning: "ultra-high strength steel"

Visar resultat 1 - 5 av 21 avhandlingar innehållade orden ultra-high strength steel.

1. 1. Laser welding of ultra-high strength steel and a cast magnesium alloy for light-weight design

   Författare :Karl Fahlström; Lars-Erik Svensson; Leif Karlsson; Michael Rethmeier; Högskolan Väst; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Laser welding; ultra-high strength steel; cast magnesium alloy; light-weight design; automotive industry; distortion; porosity; Production Technology; Produktionsteknik; Manufacturing and materials engineering; Produktions- och materialteknik;

   Sammanfattning : There is a strong industrial need for developing robust and flexible manufacturing methods for future light-weight design. Better performing, environmental friendly vehicles will gain competitive strength from using light weight structures. LÄS MER

3. 2. Dissimilar joining of aluminium to ultra-high strength steels by friction stir welding

   Författare :Wallop Ratanathavorn; Arne Melander; Gunnar Bolmsjö; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Aluminium alloy; high strength steel; intermetallic; friction stir welding; dissimilar joining; SRA - Produktion; SRA - Production;

   Sammanfattning : Multi-material structures are increasingly used in vehicle bodies to reduce weight of cars. The use of these lightweight structures is driven by requirements to improve fuel economy and reduce CO2 emissions. The automotive industry has replaced conventional steel components by lighter metals such as aluminium alloy. LÄS MER

4. 3. Study and characterization of localization and failure behaviour of ultra high strength steel

   Författare :Jesper Eman; Luleå tekniska universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Hållfasthetslära; Solid Mechanics;

   Sammanfattning : In the vehicle industry there is a constant struggle to develop cars with high passive safety without increasing the fuel consumption. High passive safety requires a very rigid behaviour of the crash protecting components. Accomplishing this often leads to an increase in the weight of the components. LÄS MER

5. 4. Modelling of forming and quenching of ultra high strength steel components for vehicle structures

   Författare :Magnus Eriksson; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Hållfasthetslära; Solid Mechanics;

   Sammanfattning : The doctoral thesis deals with modelling and simulations in integrated product and process development. The research concerns with development of models and methods for simulation of component manufacturing and product functionality. LÄS MER

7. 5. High Pressure Jet Assistance in Steel Turning

   Författare :Patrik Dahlman; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Jet Assistance; Tool Life; Chip Control; Turning; Ultra High Pressure Cooling; Jet Momentum;

   Sammanfattning : Steel turning is one of the most common industrial processes today. It is a very old process, where a lot of improvements and optimisations have been done throughout history. But, the struggle for further cost reductions pushes the process development into new areas. LÄS MER