Sökning: "Metallography"

Visar resultat 1 - 5 av 10 avhandlingar innehållade ordet Metallography.

  1. 1. Effect of boron and hydrogen on microstructure and mechanical properties of cast Ti-6Al-4V

    Detta är en avhandling från Luleå : Luleå tekniska universitet

    Författare :Raghuveer Gaddam; Luleå tekniska universitet.; [2011]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Titanium alloy; Metallography; Fractography; Castings; Low cycle fatigue; Hydrogen; Boron; Materials science - Construction materials; Teknisk materialvetenskap - Konstruktionsmaterial; Engineering Materials; Materialteknik;

    Sammanfattning : Titanium and its alloys are widely used in applications ranging from aeroengines and offshore equipment to biomedical implants and sporting goods, owing to their high ratio of strength to density, excellent corrosion resistance, and biomedical compatibility. Among the titanium alloys used in aerospace, Ti-6Al-4V (an α+β alloy) is the most widely used, in applications in which the temperature may reach 350°C, at which point it retains good fatigue and fracture properties as well as moderate tensile strength and ductility. LÄS MER

  2. 2. Microstructure and mechanical properties of Ti-6Al-2Sn-4Zr-2Mo and Ti-6Al-4V influence of H, O and B

    Detta är en avhandling från Luleå : Luleå tekniska universitet

    Författare :Raghuveer Gaddam; Luleå tekniska universitet.; [2013]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Titanium alloys; Hydrogen; Oxygen; Boron; Tensile; Compression; Fatigue; Metallography; Fractography; Materials science - Construction materials; Teknisk materialvetenskap - Konstruktionsmaterial; Engineering Materials; Materialteknik;

    Sammanfattning : Titanium and its alloys are used in a wide range of applications from aerospace, marine, biomedical implants and consumer goods, due to their superior specific strength, excellent corrosion resistance, and biocompatibility. In aerospace applications, these alloys are predominately used as components in the aero/rocket engines because of their high strength-to-density ratio compared to other metallic materials. LÄS MER

  3. 3. Study and empirical modelling of recrystallisation annealing of martensitic chromium steel strip by means of EBSD

    Detta är en avhandling från Stockholm : KTH

    Författare :Sorin Ionescu-Gabor; KTH.; [2009]
    Nyckelord :EBSD; Etching; Metallography; Cold Rolling; Recrystallisation annealing;

    Sammanfattning : Recrystallisation annealing, a repeated heat treatment between different stages of cold rolling of martensitic chromium steel strip, is successful when neither high rolling forces nor wear of the working rolls occur during the subsequent cold rolling. Mechanical properties as tensile strength, yield, elongation or hardness have been, by tradition, the criteria that described the quality of the annealing process. LÄS MER

  4. 4. Development and evaluation of hybrid joining for metals to polymers using friction stir welding

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

    Författare :Wallop Ratanathavorn; KTH.; [2015]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; aluminium alloy; thermoplastic; friction stir welding; dissimilar joining; Production Engineering; Industriell produktion;

    Sammanfattning : Combinations of different materials are increasingly used in the modern engineering structures. The driving forces of this trend are rising fuel costs, global warming, customer demands and strict emission standards. LÄS MER

  5. 5. Dissimilar joining of aluminium to ultra-high strength steels by friction stir welding

    Detta är en avhandling från KTH Royal Institute of Technology

    Författare :Wallop Ratanathavorn; KTH.; [2017]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Aluminium alloy; high strength steel; intermetallic; friction stir welding; dissimilar joining; SRA - Production; SRA - Produktion;

    Sammanfattning : Multi-material structures are increasingly used in vehicle bodies to reduce weight of cars. The use of these lightweight structures is driven by requirements to improve fuel economy and reduce CO2 emissions. The automotive industry has replaced conventional steel components by lighter metals such as aluminium alloy. LÄS MER