Sökning: "lack of fusion"

Visar resultat 1 - 5 av 80 avhandlingar innehållade orden lack of fusion.

1. 1. Cold lap formation in Gas Metal Arc Welding of steel : An experimental study of micro-lack of fusion defects

   Författare :Peigang Li; Lars-Erik Svensson; Norbert Enzinger; Högskolan Väst; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Tandem GMAW; old laps; lack of fusion; Spatter; Overlap; Overflow; Manganese; Silicon; Oxides; Temperature; Manufacturing and materials engineering; Produktions- och materialteknik;

   Sammanfattning : Cold laps are defined as micro-lack of fusion defects at the weld toe more or less parallel to the surface of the parent plate. These defects are known to negatively influence the fatigue properties of weldments. Previous studies suggest that cold lap formation can not be avoided completely in Gas Metal Arc Welding (GMAW). LÄS MER

3. 2. In-situ monitoring of laser powder bed fusion applied to defect detection

   Författare :Claudia de Andrade Schwerz; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; defect detection; productivity; nickel-based superalloy; process monitoring; pores; powder bed fusion; spatter; defect mitigation; mechanical properties; lack of fusion; melt pool; Additive manufacturing;

   Sammanfattning : Additive manufacturing technologies, particularly laser powder bed fusion (LPBF), have received much attention recently due to their numerous advantages over conventional manufacturing methods. However, the use of LPBF is still quite restricted, mainly due to two factors: its typically low productivity, which makes the technology less competitive in applications with moderate to high production volumes, and its limited reliability, particularly relevant for applications where high performance is required from the materials. LÄS MER

4. 3. Detection and classification of internal flaws in laser powder bed fusion: application of in-situ monitoring for quality control of Hastelloy X builds

   Författare :Claudia de Andrade Schwerz; Chalmers tekniska högskola; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; melt pool; productivity; flaw detection; nickel-based superalloy; powder bed fusion; lack of fusion; spatter; defects; Additive manufacturing; process monitoring; pores;

   Sammanfattning : Additive manufacturing technologies, in particular laser powder bed fusion (LPBF), have received much attention in recent years due to their multiple advantages over traditional manufacturing. Yet, the usage of additively manufactured products is still quite limited, mainly due to two factors: the low repeatability, which is particularly relevant for applications where high performance is required from the materials, and the typically low productivity, particularly relevant for products with a substantial production volume. LÄS MER

5. 4. When thoughts seem more than just thougths : body image-related cognitive fusion and its role in eating psychopathology

   Författare :Ines Trindade; Cláudia Ferreira; Portugal Coimbra University of Coimbra; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Clinical Psychology; Acceptance and commitment Therapy; body image-related cognitive fusion; cognitive fusion; eating psychopathology; assessment; Confirmatory Factor Analysis; body dissatisfaction; social comparison; mediation analysis; Psicologia Clínica; Terapia de Aceitação e Compromisso; fusão cognitiva relacionada com a imagem corporal; fusão cognitiva; psicopatologia alimentar; avaliação; Análise Fatorial Confirmatória; insatisfação corporal; comparação social; análise mediacional;

   Sammanfattning : Recent studies have revealed that cognitive fusion underlies psychological inflexibility and, as result, a wide range of psychopathology as well. It is portrayed as the extent to which one gets caught up in the content of his or her thoughts while addressing them as if they were facts rather than an interpretation of reality. LÄS MER

7. 5. Gaining Depth : Time-of-Flight Sensor Fusion for Three-Dimensional Video Content Creation

   Författare :Sebastian Schwarz; Mårten Sjöström; Roger Olsson; Reinhard Koch; Mittuniversitetet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; 3D video; Time-of-Flight; depth map acquisition; optimization; 3DTV; ToF; upsampling; super-resolution; sensor fusion;

   Sammanfattning : The successful revival of three-dimensional (3D) cinema has generated a great deal of interest in 3D video. However, contemporary eyewear-assisted displaying technologies are not well suited for the less restricted scenarios outside movie theaters. LÄS MER