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- Strondl, Annika, et al.
(författare)
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Characterization and Control of Powder Properties for Additive Manufacturing
- 2015
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Ingår i: JOM. - : Springer Science and Business Media LLC. - 1047-4838 .- 1543-1851. ; 67:3, s. 549-554
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Tidskriftsartikel (refereegranskat)abstract
- Powder characterization and handling in powder metallurgy are important issues and the required powder properties will vary between different component manufacturing processes. By understanding and controlling these, the final material properties for different applications can be improved and become more reliable. In this study, the metal powders used in additive manufacturing (AM) in terms of electron beam melting and selective laser melting have been investigated regarding particle size and shape using dynamic image analysis. In parallel, powder flow characteristics have been evaluated with a powder rheometer. Correlations within the results have been found between particle shape and powder flow characteristics that could explain certain effects of the powder processing in the AM processes. The impact, however, in the processing performance as well as in ultimate material properties was found to be limited.
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| 2. |
- Wigander, Helena, et al.
(författare)
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Quality of life and functional outcome in Swedish children with low anorectal malformations : a follow-up study
- 2019
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Ingår i: Pediatric surgery international (Print). - : Springer. - 0179-0358 .- 1437-9813. ; 35:5, s. 583-590
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Tidskriftsartikel (refereegranskat)abstract
- PURPOSE: The aim was to investigate the quality of life and bowel function in children with low anorectal malformations (ARM).ADDITIONAL AIM: To evaluate the Swedish version the Hirschsprung's Disease/Anorectal Malformation Quality of life Questionnaire (HAQL).METHODS: Forty-four children and their parents were invited to complete the HAQL and the Bowel Function Score (BFS). Healthy children participated as controls and completed the HAQL.RESULTS: Seventeen children and 18 mothers completed the HAQL. The children reported impaired function in the physical symptom (PH) fecal continence (FC) and laxative diet (LD) domains compared to controls. Compared with their mothers, they reported impaired physical function and more symptoms in the emotional functioning (EMF) and PH domains. 27 families completed the BFS; 63% reported normal bowel function, 33% moderate outcome and one patient, comprising 4%, poor outcome. Evaluation of the HAQL, FC, EMF and PH domains showed no obvious conflicts.CONCLUSIONS: The children did not differ much regarding their QoL, even though they appeared to have impaired bowel function and worse emotional functioning compared to controls. The mothers underestimated their children's physical symptoms and overestimated their emotional functioning. Evaluated domains in the HAQL appear to work as intended, but the questionnaire needs further development.
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