Sökning: "residual thermal stresses"

Visar resultat 6 - 10 av 20 uppsatser innehållade orden residual thermal stresses.

  1. 6. Development of a Method to Measure Residual Stresses in Cast Components with Complex Geometries

    Master-uppsats, KTH/Materialvetenskap

    Författare :Yang Yang; [2020]
    Nyckelord :Residual Stresses; Cast Iron; Engine Components; XRD; Ultrasonic; Cutting;

    Sammanfattning : Cast iron, taking the advantages of the advanced castability forming components of complex geometries and favorable mechanical properties, is employed in engine components in truck industries. Compacted graphite iron (CGI) integrates both merits of lamellar graphite iron (LGI) and spheroidal graphite iron (SGI) such as good machinability and high thermal conductivity from LGI, high ultimate tensile strength (UTS), good fatigue resistance, high elastic modulus, and high ductility from SGI, thus is now becoming a competitive alternative of traditional LGI in cylinder blocks and heads. LÄS MER

  3. 7. Modeling and Analysis of the Shot Peening Process : a Study of the Residual Stresses in an Insert using the Finite Element Method

    Magister-uppsats, Linnéuniversitetet/Institutionen för maskinteknik (MT)

    Författare :Hamid Torkaman; [2018]
    Nyckelord :Shot peening; Residual stresses; Cutting tool inserts; Post-coating treatment; Coated cemented carbide;

    Sammanfattning : Cutting tool inserts are often coated with thin layers either through chemical vapor deposition (CVD) or physical vapor deposition (PVD) processes. In order to have a better wear resistance cutting tools are mostly subjected to post-coating treatment processes. LÄS MER

  4. 8. Polyimide thin-ply composite

    Master-uppsats, Luleå tekniska universitet/Institutionen för teknikvetenskap och matematik

    Författare :KHALID MOUANE; [2018]
    Nyckelord :Polyimide; thin-ply; microcracking; curing stress; mechanical loading;

    Sammanfattning : Mechanical performance of composite structures is influenced by the accumulation of damage from the manufacturing process and throughout the whole service life. For instance, an aircraft is subjected to a combination of mechanical loading and the thermo-oxidative environment from the take-off to the landing. LÄS MER

  5. 9. Influence of Nitrocarburization on Thermo-Mechanical Fatigue Properties : Material Characterization of Ductile Cast Iron for Exhaust Components

    Master-uppsats, Karlstads universitet/Fakulteten för hälsa, natur- och teknikvetenskap (from 2013)

    Författare :Wännman Sofia; [2018]
    Nyckelord :Ductile cast iron; Nitrocarburizing; Thermo-mechanical fatigue;

    Sammanfattning : The large number of vehicles operating on the roads cause high emissions and consequently a negative effect on the environment. When developing and optimizing internal combustion engines, certain requirements must be considered, which are environmental regulations, reduced fuel consumption and increased specific power. LÄS MER

  7. 10. Evaluation of residual stresses and distorsions in additively manufactured components

    Master-uppsats, KTH/Hållfasthetslära (Avd.)

    Författare :Sonja Jonsson; Sebastian Krappedal; [2018]
    Nyckelord :Additive manufacturing; selective laser melting; inherent strain; distortions; residual stresses; X-ray di↵raction; Simufact Additive;

    Sammanfattning : Additive manufacturing is a novel manufacturing technique, which has developed rapidly in recent years. The additive manufacturing process produces complex geometries, light weighted components and reduces the material waste. During the building process, a laser energy source is commonly used to melt the metal powder. LÄS MER