Sökning: "Powder"
Visar resultat 21 - 25 av 606 avhandlingar innehållade ordet Powder.
21. Surface Composition and Microstructure Control during Pressureless Forming and Sintering of Ferrous Powder Metallurgy Materials
Sammanfattning : This study addresses key issues related to different stages of ferrous PM materials processing. Several analytical tools are applied in the study of surface composition and microstructure control in the processing of ferrous powder including forming, degassing and sintering stages. LÄS MER
22. The process atmosphere as a parameter in the Laser-Powder Bed Fusion process
Sammanfattning : Laser-Powder Bed Fusion (L-PBF) is an Additive Manufacturing (AM) technique that allows to produce near-net shape components of complex design. Applied to metallic materials, L-PBF allows to consolidate subsequent layers of powder using the heat from laser radiation. LÄS MER
23. Modelling of compaction of metal powder and damage accum ulation due to fatigue in powder materials
Sammanfattning : This thesis addresses powder manufactured (P/M) components, with special attention to the compaction process and to the sensitivity to damage accumulation due to fatigue within powder compacted specimens. Three dimensional simulations of the compaction process have been performed, using an explicit dynamic dilatant finite strain finite element code supplemented with the effects from contact friction within the die, modelled by Coulomb friction. LÄS MER
24. Nanopowder as sintering aid for water-atomized ferrous powder
Sammanfattning : Press and sinter powder metallurgy steels are cost-effective solutions for structural applications. There is a constant drive for improvement in the density of these powder metallurgy steels to expand their usage in high-performance applications. LÄS MER
25. Synthesis of Transition Metal Aluminides from Elemental Powder Mixtures
Sammanfattning : Structural components such as those used in gas turbines for energy conversion applications, are subjected to high loads at elevated temperatures. In order to ensure that the components survive under these conditions for a sufficiently long time, it is imperative to select materials with good high temperature properties like strength and corrosion resistance. LÄS MER