Essays about: "Vickers microhardness testing"

Found 2 essays containing the words Vickers microhardness testing.

  1. 1. Microstructural and Micro-Mechanical Characterization of As-built and Heat-treated samples of HASTELLOY X produced by Laser Powder Bed Fusion Process

    University essay from Högskolan Dalarna/Institutionen för information och teknik

    Author : Onimisi Sanni; [2022]
    Keywords : As-built Hastelloy X blocks; Laser powder bed fusion LPBF ; Solution heat-treatment; Disrupted epitaxial growth; Melt Pool Boundaries MPB ; Grain Boundaries GB ; Precipitates; In-situ microtensile testing; microhardness; Mechanical properties; Twin grain boundary fractions;

    Abstract : Microstructure and micro-mechanical characterization of as-built and heat-treated samples of Hastelloy X produced by laser powder bed fusion (LPBF) process has been carried out in this study. As-built LPBF blocks were solution heat-treated at 1177°C and 1220°C followed by fast cooling. READ MORE

  3. 2. Alternative welding methods for nitrogen alloyed steel

    University essay from Örebro universitet/Institutionen för naturvetenskap och teknik

    Author : Anders Bertilsson; [2017]
    Keywords : Nitrogen alloyed tool steel; Uddeholm Vanax SuperClean; solid-state welding; direct-drive friction welding; friction stir welding; microstructure; Vickers microhardness testing; retained austenite measurement by X-ray diffraction; Kvävelegerat verktygsstål; Uddeholm Vanax SuperClean; trycksvetsning; friktionssvetsning; friktionsomrörningssvetsning; mikrostruktur; Vickers mikrohårdhetsmätning; restaustenitmätning med röntgendiffraktion;

    Abstract : This project explores the feasibility of the solid-state welding method direct-drive friction welding to be used as a joining method for the nitrogen alloyed steel Uddeholm Vanax SuperClean, produced via processes based on powder metallurgy. Vanax SuperClean cannot be welded using fusion welding methods where the base material melts, due to nitrogen escaping the material, resulting in inferior quality welds. READ MORE