Search for dissertations about: "High temperature"

Showing result 1 - 5 of 3073 swedish dissertations containing the words High temperature.

  1. 1. High temperature galling influencing parameters and mechanisms

    University dissertation from Luleå : Luleå tekniska universitet

    Author : Leonardo Pelcastre; [2013]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Machine Elements; Maskinelement; Centre - Centre for High Performance Steel CHS ; Centrumbildning - Centrum för högpresterande stål CHS ;

    Abstract : Damage of forming tools at elevated temperatures is a major problem in metal forming processes such as hot stamping. Of special importance is the occurrence of adhesion and gross material transfer from the work-piece to the tool surface, a phenomenon known as galling. READ MORE

  2. 2. On high temperature oxidation resistance Towards the materials genome of high temperature alloys

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Samuel Hallström; John Ågren; Roger Reed; [2014]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Materials Science and Engineering; Teknisk materialvetenskap;

    Abstract : The efficiency of a heat engine increases with increasing service temperature. This leads to a demand for material that can withstand aggressive environments and sometimes also high load at higher and higher temperature. That is the rationale for the work of this thesis. READ MORE

  3. 3. High-Temperature Corrosion-Fatigue of Cast Alloys for Exhaust Manifolds

    University dissertation from Stockholm : KTH Royal Institute of Technology

    Author : Shengmei Xiang; Joakim Odqvist; Baohua Zhu; Johan Ahlström; [2018]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; High temperature; corrosion fatigue; low-cycle fatigue; cast alloys; high-temperature oxidation; intermetallic phase; Materials Science and Engineering; Teknisk materialvetenskap;

    Abstract : The introduction of gas-driven Otto engine and the corresponding usage of bio-fuels in heavy-duty engines will render the exhaust atmosphere more corrosive and bring a higher working temperature to exhaust manifolds. The current service material, a ferritic ductile cast iron called SiMo51, will soon meet its upper temperature limit set by the ferrite-austenite transformation at 860ºC. READ MORE

  4. 4. High Temperature Wear Processes

    University dissertation from Luleå tekniska universitet

    Author : Sinuhe Hernandez; [2014]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Maskinelement; Machine Elements;

    Abstract : Moving machine assemblies are increasingly exposed to extreme operating conditions involving high temperatures owing to demands on higher power densities, high performance/efficiency and extreme environments. The changes in surface and near surface properties of contacting surfaces caused by exposure to high temperature and deformation govern the occurrence of friction, wear and material transfer of the tribological system. READ MORE

  5. 5. Sense, Actuate and Survive : Ceramic Microsystems for High-Temperature Aerospace Applications

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Peter Sturesson; Greger Thornell; Lena Klintberg; Peter Bull; Pelle Rangsten; [2018]
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; high temperature; ceramics; microsystems; aerospace; sensors; thrusters; Försvarssystem; Military Technology;

    Abstract : In aerospace applications, but also in manufacturing, mining, energy industry and natural hazards, high temperature, corrosion, erosion and radiation, challenge the performance and being of hardware.In this work, high-temperature co-fired ceramic (HTCC) alumina and platinum have been used for a range of devices intended for aerospace applications at up to 1000°C. READ MORE