Sökning: "Keyhole Porosity"
Hittade 5 avhandlingar innehållade orden Keyhole Porosity.
1. Laser Based Powder Bed Fusion of Plain Carbon and Low-Alloy Steels: Microstructure and Processability
Sammanfattning : Despite the prominence of laser based powder bed fusion (LB-PBF) as an additive manufacturing technique, the number of alloys that have been approved for the process remains limited. In traditional manufacturing, ferrous alloys are the most common alloy group, consisting primarily of plain carbon and low-alloy steels. LÄS MER
2. Dynamik und Stabilität der Dampfkapillare beim Laserstrahltiefschweißen
Sammanfattning : The keyhole which is typical for laser deep penetration welding is responsible for the highly dynamic process behavior, which results in unwanted pore and spatter formation. This work aims to better understand the dynamic keyhole properties and occurrence of process defects. LÄS MER
3. Development of Structural Steels for Powder Bed Fusion - Laser Beam
Sammanfattning : Over the past decade, powder bed fusion – laser beam (PBF-LB) has attracted noticeable attention from both academia and industry. However, there remains a scarcity of approved material for the process, as fewer than 40 alloys are commercially available. LÄS MER
4. Technical development of the laser welding process
Sammanfattning : This thesis describes the technical development of the laser welding process and presents the results from a number of experimental investigations. The seven papers that make up the thesis investigate various aspects of the technical development of the laser welding process mechanism as well as industrial applications. LÄS MER
5. Laser welding of aluminium alloys
Sammanfattning : This thesis treats laser welding of aluminium alloys from a practical perspective with elements of mathematical analysis. The theoretical work has in all cases been verified experimentally. The aluminium alloys studied are from the 5xxx and 6xxx groups which are common for example in the automotive industry. LÄS MER