Sökning: "High-temperature oxidation"

Visar resultat 1 - 5 av 145 avhandlingar innehållade orden High-temperature oxidation.

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

    Detta är en avhandling från Stockholm : KTH Royal Institute of Technology

    Författare :Samuel Hallström; KTH.; [2014]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Materials Science and Engineering; Teknisk materialvetenskap;

    Sammanfattning : 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. LÄS MER

  2. 2. High temperature galling influencing parameters and mechanisms

    Detta är en avhandling från Luleå : Luleå tekniska universitet

    Författare :Leonardo Pelcastre; Luleå tekniska universitet.; [2013]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Machine Elements; Maskinelement; Centre - Centre for High Performance Steel CHS ; Centrumbildning - Centrum för högpresterande stål CHS ;

    Sammanfattning : 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. LÄS MER

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

    Detta är en avhandling från Stockholm : KTH Royal Institute of Technology

    Författare :Shengmei Xiang; KTH.; [2018]
    Nyckelord :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;

    Sammanfattning : 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. LÄS MER

  4. 4. High Temperature Oxidation and Chlorination of FeCrAl alloys

    Detta är en avhandling från Stockholm : KTH Royal Institute of Technology

    Författare :Niklas Israelsson; [2014]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; KCl; pre-oxidation; FeCrAl; H2O; high-temperature corrosion; kinetics;

    Sammanfattning : AbstractThe constant strive for improved efficiency and lower-cost industrial processes often results in progressively higher temperatures and more aggressive environments. High- temperature corrosion is a well-known problem in biomass- and waste-fired boilers and is one of the obstacles to overcome in achieving a more sustainable society. LÄS MER

  5. 5. High Temperature Corrosion of Cast Irons and Steels

    Detta är en avhandling från Stockholm : KTH Royal Institute of Technology

    Författare :Frédéric Tholence; [2004]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; high temperature corrosion; cast steel; austenitic stainless steel; SiMo; cast iron; oxidation; exhaust gases; Ni-resist; LCF; ferritic stainless steel;

    Sammanfattning : During the last decades, tougher competition and stiffer government policies have forced the automotive industry into a race for safer, cleaner and more fuel-efficient vehicles at low cost. As a consequence, exhaust systems should resist to increased working temperatures. LÄS MER