Sökning: "precipitation hardening"

Visar resultat 1 - 5 av 40 avhandlingar innehållade orden precipitation hardening.

1. 1. Precipitation Processes in Precipitation Hardening Stainless Steel

   Författare :MARCUS ANDERSSON; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; stainless steel; precipitation; hardening; 3DAP; ageing; TEM;

   Sammanfattning : .... LÄS MER

3. 2. Monotonic and Cyclic Plastic Deformation of High-Strength Aluminium Alloys

   Författare :Magnus Hörnqvist Colliander; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Strain rate effects; Heat treatment; Dynamic strain ageing; Precipitation hardening; Low cycle fatigue; AA7030; Plastic deformation; Temperature effects; EN AW-7030; Al-Zn-Mg; Strain hardening; Mechanical properties; Dynamic precipitation.;

   Sammanfattning : Dynamic strain ageing (DSA) and dynamic precipitation (DP) are two, closely interrelated, phenomena arising from the dynamic interaction between mobile solute atoms and dislocations. The occurrence of DSA and DP is confined to specific ranges of strain rate and temperature, and aluminium alloys are generally prone to experience DSA and DP already at ambient temperatures and conventional strainrates. LÄS MER

4. 3. Modelling mechanical properties by analysing datasets of commercial alloys

   Författare :Johan Zander; Rolf Sandström; Stanislaw Zajac; KTH; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Aluminium alloys; modelling; material optimisation; mechanical properties; solid solution hardening; precipitation hardening; work-hardening; multiple regression; stainless steel; Materials science; Teknisk materialvetenskap;

   Sammanfattning : Commercial alloys are continuously developed to improve their performance. Therefore it is important to develop new optimisation software, which could be used in development of new materials or in materials selection. In this study the mechanical properties which are important in materials selection in mechanical design are investigated. LÄS MER

5. 4. The Precipitation and Deformation Behaviour of Superaustenitic Stainless Steel

   Författare :Stefan Heino; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; precipitation; low cycle fatigue TEM; slip behaviour; superaustenitic stainless steel; EDS; cyclic deformation; HAZ; tungsten; molybdenum;

   Sammanfattning : The present study concerns the precipitation behaviour and the deformation characteristics of a superaustenitic stainless steel with composition Fe-24Cr-22Ni-7.3Mo-0.5N (wt%). Regarding precipitation, also materials with Mo partially replaced by W have been studied. LÄS MER

7. 5. Secondary hardening in some low-chromium hot-work tool steels

   Författare :Jörgen Andersson; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; LEAP; coarsening; nitriding; SEM; TEM; vanadium; precipitation hardening;

   Sammanfattning : Low-chromium hot-work tool steels combine good heat conductivity with excellent tempering resistance. This property combination has made these steels ideal for die casting and extrusion. LÄS MER