Search for dissertations about: "Creep of Steel"

Showing result 1 - 5 of 50 swedish dissertations containing the words Creep of Steel.

  2. 1. Microanalysis of a ferritic steel intended for high temperature applications

    Author : Lars Lundin; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; creep resistant; chromium steel; atom-probe field-ion microscopy; tempered martensite; powder metallurgical; preciotate; creep; microstructure; TEM; ferretiv steel;

    Abstract : .... READ MORE

  4. 2. Creep Behavior of High Temperature Cast Materials for Exhaust Applications

    Author : Christian Öberg; Stefan Jonsson; Baohua Zhu; John Hald; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Creep; creep behaviour; creep damage; ductile cast iron; high-alloyed austenitic cast steel; thermal cycling; tensile testing; stress relaxation; oxidation; precipitation.; Teknisk materialvetenskap; Materials Science and Engineering;

    Abstract : This thesis focuses on creep of four cast materials intended for exhaust manifolds in heavy-duty truck engines. Two of the materials are ferritic ductile cast irons, SiMo51 and SiMo1000, one is an austenitic ductile cast iron, D5S, and another one is an austenitic cast steel, HK30. READ MORE

  5. 3. Mechanical Properties of Welds at Creep Activation Temperatures

    Author : Henrik C.M. Andersson-Östling; Rolf Sandström; Kamran Nikbin; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; creep; creep crack propagation; OFHC copper; welds; nuclear waste disposal; creep modeling; Materials science; Teknisk materialvetenskap;

    Abstract : Welds in materials intended for service at temperatures above the creep activation temperature often develop damage before the base metal. The weld is a discontinuity in the material and stresses and strains often accumulate in the weld. Knowledge of the properties of the weld is essential to the safe operation of the component containing the weld. READ MORE

  6. 4. Influence of Segregants on Creep Fracture in Powder Metallurgical Martensitic Stainless Steel

    Author : Mats Norell; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; AES; creep; segregants; powder metallurgy; prior particle boundaries; atomisation; SIMS; martensitic stainless steel; ESCA; cavities; powder surfaces;

    Abstract : This thesis deals with the behaviour of segregants in Powder Metallurgical (PM) 10%Cr steel and their impact on creep fracture. Particular interest is taken in determining the reaction products involved in creep cavitation and how these are connected to the powder surface reactions during the gas atomisation and consolidation (hot isostatic pressing). READ MORE

  7. 5. Structural integrity of prestressed nuclear reactor containments

    Author : Patrick Anderson; Avdelningen för Konstruktionsteknik; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; steel liner; reliability; relaxation; shrinkage; creep; loss of prestress; tendon; Nuclear; containment; design pressure; Construction technology; Anläggningsteknik;

    Abstract : A nuclear power plant is provided with an extensive defense intended to prevent radioactive discharge in case of a reactor accident. This defense is built up of several independent safety barriers, where the reactor containment constitutes the last barrier to the environment. READ MORE