Sökning: "microstructure"

Visar resultat 26 - 30 av 970 avhandlingar innehållade ordet microstructure.

1. 26. On the microstructure and mechanical properties of Mg-Al alloys

   Författare :Haiping Cao; Linköpings universitet; []
   Nyckelord :Mg-AI; microstructure; mechanical properties; divorced degree; modeling; mould constraint; segregation band; TECHNOLOGY; TEKNIKVETENSKAP;

   Sammanfattning : The microstructural features and the mechanical properties of binary Mg-Al alloys have been investigated by using a gradient solidification technique. Homogeneous and nearly defect-free samples were produced under well controlled cooling conditions, through which the microstructural characteristics as well as the relationships between microstructure and mechanical properties in Mg-AI alloys were precisely defined. LÄS MER

3. 27. The influence of Al alloy microstructure on conversion coating formation

   Författare :Salil Sainis; Caterina Zanella; Ehsan Ghassemali; Jönköping University; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; aluminium alloys; cast Al-Si alloys; conversion coating treatment; cerium; localized deposition; surface pre-treatments; microstructure; SEM; FIB-SEM; AFM-SKPFM; aluminiumlegeringar; gjutna Al-Si legeringar; omvandlingsbeläggningar; cerium; lokaliserad deposition; ytförbehandlingar; microstruktur SEM; FIB-SEM; AFM-SKPFM;

   Sammanfattning : The formation of conversion coatings based on Ce, trivalent Cr and Ti/Zr is triggered by the local pH increase at cathodic IM sites of the aluminium alloy microstructure. The pH gradient is created over the cathodic intermetallic (IM) sites of the microstructure and its intensity is influenced by their activity which depends on their chemical composition, their size, and spatial distribution. LÄS MER

4. 28. Microstructure and hydrogen embrittlement of additively manufactured Ti-6Al-4V

   Författare :Magnus Neikter; Marta-Lena Antti; Pia Åkerfeldt; Robert Pederson; Ola Harrysson; Luleå tekniska universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Ti-6Al-4V; Additive Manufacturing; Texture; Microstructure; Hydrogen Embrittlement; Materialteknik; Engineering Materials;

   Sammanfattning : The work of this doctoral thesis has been performed between the 24th of August 2015 to the 6th of September 2019. The general purpose of this work has been to increase the knowledge of additively manufactured Ti-6Al-4V when it comes to microstructure, texture and hydrogen embrittlement. LÄS MER

5. 29. Microstructure of the Schottky contact : Ag/GaAs and Au/GaAs

   Författare :Qiu-Hong Hu; Chalmers tekniska högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Au; atom-probe fiels-ion microscopy; Schottky contact; interface; Ag; microstructure; transmission electron microscopy; GaAs; oxygen;

   Sammanfattning : .... LÄS MER

7. 30. Flow and Compression of Granulated Powders : The Accuracy of Discrete Element Simulations and Assessment of Tablet Microstructure

   Författare :Ann-Sofie Persson; Göran Frenning; Göran Alderborn; Marie Wahlgren; Uppsala universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Discrete Element Method; Granule; Flow; Angle of Repose; Discharge Rate; Shear; Rolling friction; Compression; Elastic deformation; Microstructure; Degree of compression; Tensile strength; Galenisk farmaci; Pharmaceutics;

   Sammanfattning : Simulations are powerful and important tools for gaining insight into powder processes. Ultimately, simulations have the potential to replace experiments. Thus, accurate models and insight into the essential factors for descriptions of powder behaviour are required. LÄS MER