Search for dissertations about: "Martensitic transformations"

Showing result 1 - 5 of 12 swedish dissertations containing the words Martensitic transformations.

2. 1. Martensitic Transformations in Steels : A 3D Phase-field Study

   Author : Hemantha Kumar Yeddu; John Ågren; Annika Borgenstam; Yunzhi Wang; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Phase-field method; Martensitic transformations; Plastic de formation; Multi-length scale modeling; Microstructure; Stress states; Steels;

   Abstract : Martensite is considered to be the backbone of the high strength of many commercial steels. Martensite is formed by a rapid diffusionless phase transformation, which has been the subject of extensive research studies for more than a century. READ MORE

4. 2. Finite element simulation of transformation plasticity in martensitic transformation

   Author : Kjell Simonsson; Sören Sjöström; Linköpings universitet; []
   Keywords : Phase transformations. transformation plasticity; micromechanical models; martensitic transformation; finite element simulations. thermodynamics; moving interface; mechanical dissipation; TECHNOLOGY; TEKNIKVETENSKAP;

   Abstract : This study is concerned with the simulation of transformation plasticity in martensitic transformation. In the first paper the concept of a transformation plasticity strain is introduced from a phenomenological point of view. READ MORE

5. 3. Laser-induced phase transformations in microalloyed steels

   Author : Handika Sandra Dewi; Alexander Kaplan; Joerg Volpp; William O´Neill; Luleå tekniska universitet; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Produktionsutveckling; Manufacturing Systems Engineering;

   Abstract : The application of thermal cycles below melting temperature can induce solid-to-solid phase transformation in steels, which is the transition between different crystalline structures of the same compound. There are many types of crystalline structures in steels produced, depending on the characteristics of the applied thermal cycle. READ MORE

6. 4. Deformation and martensitic phase transformation in stainless steels

   Author : Peter Hedström; Luleå tekniska universitet; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Engineering Materials; Materialteknik;

   Abstract : The use of high-energy synchrotron x-rays which has enabled three- dimensional structural characterization from the nano- to the macroscopic scale, and now to the meso-scale, such as individual grains and dislocation structures, is a major scientific advance. This is the first technique with sufficient spatial resolution and penetration power to probe the local structure embedded deep within the material. READ MORE

7. 5. Thermal and stress induced gamma to epsilon martensitic transformations in Fe-Mn-Si shape memory alloys

   Author : Magnus Andersson; KTH; []
   Keywords : Fe; Mn; Si; Epsilon martensite; Transformation temperatures; Enthalphy; Stress induced; Magnetic transformation; Néel temperature; Shape memory; TECHNOLOGY; TEKNIKVETENSKAP;

   Abstract : .... READ MORE