Search for dissertations about: "Lifeextension"

Found 2 swedish dissertations containing the word Lifeextension.

  2. 1. Application of high-frequency mechanical impact treatment for fatigue strength improvement of new and existing bridges

    Author : Hassan al-Karawi; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Corrosion; Bridges; Fatigue; Crackdetection; HFMI; Finiteelement; Steel; Lifeextension; Post-weldtreatment; Variableampli- tude;

    Abstract : This thesis investigates the application of High-Frequency Mechanical Impact (HFMI) treatment for fatigue strength improvement of weldments in existing and new bridges. In the former case, the welds have already been subjected to fatigue loading and accumulated damage before treatment. READ MORE

  4. 2. Life assessment from weld microstructures at high temperatures

    Author : Jan Storesund; KTH; []
    Keywords : ;

    Abstract : Most pressure vessels in fossil power plant are designed forcreep. After operation of the order of the design lifetime thematerial may be degraded and further operation is limited.Methods which can prolong the lifetime and assess thecomponents is therefore demanded. READ MORE