Essays about: "laser heating"

Showing result 1 - 5 of 17 essays containing the words laser heating.

  1. 1. In-vivo assessment of unwanted tissue heating during near infrared laser light emission

    University essay from Lunds universitet/Atomfysik; Lunds universitet/Fysiska institutionen

    Author : Martin Molin; [2020]
    Keywords : tissue heating; laser heating; NIR window; biophotonics; spectroscopy; Medicine and Health Sciences;

    Abstract : In this work, potential adverse tissue heating in conjunction with near infrared (NIR) laser spectroscopy was studied. The tissue heating from laser light within the NIR optical window is currently a relatively unexplored field. READ MORE

  2. 2. Characterization of Heat Treated LMwD Ti-6Al-4V to Study the Effect of Cooling Rate on Microstructure and Mechanical Properties

    University essay from Luleå tekniska universitet/Institutionen för teknikvetenskap och matematik

    Author : Emil Edin; [2019]
    Keywords : Ti-6Al-4V; LMwD; Characterization; Alpha Laths;

    Abstract : In this work, the influence of different cooling rates (5, 20, 50 and 100 °C/s) on the microstructure and mechanical properties of Laser Metal Wire Deposited (LMwD) Ti-6Al-4V was investigated, this was done using a thermal-mechanical physical simulation system (Gleeble 3800, DSI). Two different soak times above β transus (held at 1100 °C), 5 and 40 s, were used and after cooling to 150 °C, the samples were tensile tested. READ MORE

  3. 3. Development of Spectroscopic Measurements for Raman and Thomson Scattering Diagnostics ——Applications in Combustion and Plasma

    University essay from Lunds universitet/Fysiska institutionen; Lunds universitet/Förbränningsfysik

    Author : Miaoxin Gong; [2019]
    Keywords : Raman scattering; Raman spectroscopy; Thomson scattering; stray light suppression; periodic shadowing; high dynamic range imaging; digital micro-mirror device; DMD; laminar flames; combustion; gas discharge; plasma; laser diagnostics; spectrometer; improved spectroscopy; spectroscopy; Physics and Astronomy;

    Abstract : This thesis work concerns methods for improved spectroscopy including stray-light suppression, dynamic range improvement and signal enhancement. These methods were applied in Raman and Thomson- scattering spectroscopy in combustion and plasma. READ MORE

  4. 4. Raman spectroscopy for characterization of soot and other carbonaceous materials

    University essay from Lunds universitet/Fysiska institutionen; Lunds universitet/Förbränningsfysik

    Author : Jonatan Henriksson; [2019]
    Keywords : Physics and Astronomy;

    Abstract : Raman spectroscopy is well known as a method that can be used to study the structural characteristics of carbon materials such as soot and carbon black. In this work, a Raman spectroscopy setup was used to record spectra of various carbonaceous samples under different experimental conditions. READ MORE

  5. 5. Residual stresses and distortions in austenitic stainless steel 316L specimens manufactured by Selective Laser Melting

    University essay from Högskolan Väst/Avdelningen för svetsteknologi (SV)

    Author : Henrik Nöbauer; [2018]
    Keywords : Residual Stresses; Distortions; SLM; Selective Laser Melting; 316L; X-ray diffraction; XRD; ESPI; Hole drilling;

    Abstract : Residual stresses are one of the major challenges in additive manufacturing of metallic materials today. They are induced during manufacturing because of the rapid local heating and cooling and may cause distortions, cracking and delamination between layers. READ MORE