A5069836114- Additive Manufacturing Materials and Processes
- Metal Alloys Wear and Properties
- Additive Manufacturing and 3D Printing Technologies
- High Entropy Alloys Studies
- Advanced materials and composites
- Metal and Thin Film Mechanics
- Welding Techniques and Residual Stresses
- Titanium Alloys Microstructure and Properties
- Intermetallics and Advanced Alloy Properties
- Metal Forming Simulation Techniques
- Mechanical stress and fatigue analysis
- Aluminum Alloys Composites Properties
- Advanced ceramic materials synthesis
- Microstructure and Mechanical Properties of Steels
- Bone Tissue Engineering Materials
- Metallurgy and Material Forming
- Adhesion, Friction, and Surface Interactions
- Carbon Nanotubes in Composites
- Force Microscopy Techniques and Applications
- Diamond and Carbon-based Materials Research
- Powder Metallurgy Techniques and Materials
- Advanced machining processes and optimization
- Mechanical and Optical Resonators
- Tunneling and Rock Mechanics
- High-Temperature Coating Behaviors
Karlstad University
2015-2024
Chalmers University of Technology
2003
The article explores an evolution of a microstructure in AISI 420 martensitic stainless steel during selective laser melting. Several upper layers had hardness 750 HV and contained 21 ± 12 vol.% austenite phase. final bulk consisted thermally decomposed martensite with 500–550 unusually high, 57 8 vol.%, amount austenite. Obtained results indicate that manufacturing partitioning reversion took place, owing to the thermal cycling inner regions manufacturing. Numerical simulation was found...
This article overviews the scientific results of microstructural features observed in 316 L stainless steel manufactured by laser powder bed fusion (LPBF) method obtained authors, and discusses with respect to recently published literature. Microscopic LPBF microstructure, i.e., epitaxial nucleation, cellular structure, microsegregation, porosity, competitive colony growth, solidification texture, were experimentally studied scanning transmission electron microscopy, diffraction methods,...
Mechanical properties, porosity, and microstructure of Ti6Al4V (ELI) material produced by Selective Laser Melting (SLM) under controlled oxygen content were analyzed. Fully martensitic α'structure with high dislocation density stacking faults was observed in both as-built stress relieved samples means XRD TEM. Tensile {101 ̅2} twinning identified TEM electron diffraction. Accommodation thermal stresses during manufacturing suggested as a possible reason for twinning. Computed tomography...
Using embedded atom method potential, extensive large-scale molecular dynamics (MD) simulations of nanoindentation/nanoscratching nanocrystalline (nc) iron have been carried out to explore grain size dependence wear response. MD results show no clear the frictional and normal forces on size, single-crystal (sc) has higher force compared nc-samples. For all samples, dislocation-mediated mechanism is primary cause plastic deformation in both nanoindentation/nanoscratch. However, secondary...
Biofunctionalization of Ti6Al4V alloy with metallic agents like Ag or Cu is a promising approach to add antibacterial properties and thus reduce the risk implant failure. This research investigates in-situ alloying Ti6Al4V(ELI) 3 at.% powders using Laser Powder Bed Fusion (L-PBF). The morphology geometrical characteristics single tracks layers were studied. powers 170 W 340 W, scanning speeds ranging from 0.4 1.4 m/s 0.8–2.8 implemented. Single track results showed balling effect humping at...
Due to high productivity, additive manufacturing (AM), and especially Directed Energy Deposition using laser metallic powder (DED-LB/M) is attractive for tools with integrated functionalities. This investigation was dedicated DED-LB/M of experimental maraging tool steel, characterization the build microstructure advanced electron microscopy evaluation hardness properties. High printability low porosity final builds were observed, relative density not lower than 99.5% specimens manufactured...
The modern medical industry successfully utilizes Laser Powder Bed Fusion (LPBF) to manufacture complex custom implants. Ti6Al4V is one of the most commonly used biocompatible alloys. In surgery practice, infection at bone-implant interface key reasons for implant failure. Therefore, advanced implants with biocompatibility and antibacterial properties are required. Modification Ti alloy Cu, which in small concentrations a proven non-toxic agent, an attractive way embedded functionality....
Austempered ductile irons (ADIs) are used in applications commonly exposed to severe contact conditions, and as a consequence wear damage frequently followed by failure of components. Hence, resistance the material governs final life time component. In present work, sliding two ausferritic spheroidal graphite ADI1 ADI2 mining construction equipment was investigated. were heat treated similar strength, volume fraction carbon-rich austenite around 30% 16%, respectively, they both contained 10...
This study addresses the critical need for a constitutive model to analyze cyclic plasticity of additively manufactured 316L stainless steel. The anisotropic behavior at both room temperature and 300°C is investigated experimentally based on hysteresis loops performed in different orientations with respect build direction. A comprehensive proposed, that integrates Armstrong-Frederick nonlinear kinematic hardening, Voce isotropic hardening Hill's yield criterion within 3D return mapping...
Direct metal laser sintering (DMLS) is an additive manufacturing technology used to melt powder by high power produce customised parts, light-weight structures, or other complex objects. During DMLS, melted and solidified track-by-track layer-by-layer; thus, building direction can influence the mechanical properties of DMLS parts. The microstructure material produced depend on properties, process parameters, scanning strategy, geometry. In this study, microstructure, tensile porosity Ti6Al4V...