The rapid growth of Additive Manufacturing (AM) in the past decade has demonstrated a significant potential cost-effective production with superior quality product. A numerical simulation is steep way to learn and improve product quality, life cycle, cost. To cope growing AM field, researchers are exploring different techniques, methods, models simulate process efficiently. goal develop thermo-mechanical weld model for Directed Energy Deposition (DED) 316L stainless steel at an efficient...

The advancement in additive manufacturing encourages the development of simplified tools for deep and swift research technology. Several approaches were developed to reduce complexity multi-track modeling manufacturing. In present work, a simple heat source model called concentrated was evaluated single- deposition directed energy deposition. compared with widely accepted Goldak model. does not require melt pool dimension measurement thermal simulation. Thus, it reduces considerable time...

Additive manufacturing (AM) becomes a more and standard process in different fields of industry. There is still only limited knowledge the relationship between measured material data overall behaviour directed energy deposition (DED)-processed complex structures. The understanding structural performance, including flow curves local damage properties additively manufactured parts by DED, increasingly important. DED can be used for creating functional surfaces, component repairing using...

This study evaluated residual stresses in heat-treated specimens made of 316L stainless steel using FE analysis and compared them with determined by the contour method. Contour method is usually used just for evaluation that are normal to cut plan. In current this approach extended both tangential determined. The were wire electrical discharge machine contours measured a coordinate measuring machine. prior treatment was simulated finite-element An appropriate boundary condition...

Purpose: At present, materials research in the area of SPD (severe plastic deformation) processes is very intensive. Materials processed by these techniques show better mechanical properties and have finer grain when compared to input feedstock. The refined microstructure may be ultrafine-grained or nanostructured, where size becomes less than 100 nm. One used for such CP (commercially pure) titanium various grades, which widely manufacturing dental implants. article deals with one...

One of available ways to enhancing the efficiency production sections is combining CONFORM continuous extrusion process and ECAP method. This paper describes initial experience with such a combined deployed in 315i machine, which equipped specially-designed die chamber. Process trials were performed explore effects set-up equipment on resulting microstructure Ti wire. The feedstock was form CP grade 2 bars 10 mm diameter. Crucial parameters include temperature chamber, purposefully varied...

In the present study, effect of material deposition at elevated temperature baseplate on microstructure and mechanical properties was investigated correlated to unique thermal history by using numerical simulation. Numerical results agreed well with experimental properties. revealed a significant decrease in gradient 40% stress due baseplate. The reduced resulted coarser grain features, which turn led hardness tensile strength, especially for bottom region near Meanwhile, no could be found...

Titanium and its alloys are frequently used in many sectors, including the health care sector, where they outperform other materials. From biocompatibility viewpoint, preferred condition of these materials is ultrafine or nanostructured state. Processes based on severe plastic deformation (SPD) that capable producing microstructures with sizes order nanometers gaining importance days. Their typical limitation small volume material processed. One available ways to enhancing productivity...

Distortion in additively manufactured metal parts is of interest to keep structural reliability.It important control the dimensional tolerance structure.This does not only reduce cost manufacturing, but also improves quality parts.Distortion additive manufacturing (AM) inevitable due localized heating, large thermal gradient, cycles, cooling rate, process parameters, etc. Base plate distortion during AM was studied detail.Base deformation measured using a 3D scanner.The surface geometry base...

Abstract In the present study, additively manufactured (AM) samples of different sizes were analysed by contour method (CM). Builds three volumes examined to determine influence residual stress (RS) distribution along z-axis on volumetric changes in part. They made using direct energy deposition (DED) technique. Only a handful reports cover use CM for finding RS DED builds. This study aims complement those with new findings. The is destructive technique whose main advantages are absence...

Additive manufacturing (AM) of metals proved to be beneficial in many industrial and non-industrial areas due its low material waste fast stacking speed fabricate high performance products. The present contribution addresses several known challenges including mechanical behaviour porosity analysis on directed energy deposition (DED) manufactured stainless steel 316L components. experimental methodology consisting metal procedure, hardness testing fractographic observations mini-tensile test...

Abstract This paper focuses on separate aspects of the utilization additive manufacturing (AM) for in-core applications in nuclear power industry. study investigates application laser direct energy deposition method (L-DED) to produce in-reactor metallic components within LWR reactors. 316L stainless steel with heat treatment was chosen as material interest experimental evaluation properties after neutron irradiation. Samples tensile test at 300 °C and microstructural analysis (LOM, EBSD,...

The paper describes the effect of laser traverse speed during hardening on hardness and micro-structure. experimental material is hot work tool steel AISI H11 with samples sized 100×100×35 mm. initial state before quenched tempered. temperature constant at 1100 °C, selected was 1, 2, 4, 6 mm/s. A numerical simulation performed in DEFORM-3D software experiment showed tendencies displacement expected course hardness. Increasing leads to de-creased laser-hardened depth decreased drop...

Abstract Distortion in the metal additive manufacturing due to inherent residual stress during separation of deposited part from base plate is critical. gets amplified after removing it build platform. Internal sample material deposition and cooling phase crucial estimate. Residual structure influences structural distortion. Numerical analysis prior helps identify inconsistent built take required measures like optimising process parameters, preheat make less significant. estimation before...

The technology of additive manufacturing (AM) offers great opportunities, such as complex geometries and shapes desired products. In contrast to other conventional methods, specifically subtractive formative, where the material is subtracted or filled into a form, principle AM addition. added in thin layers, one on top other, then sintered, usually using laser an electron beam. process continuously repeated until product finished. presented paper discusses methods that use metal materials it...

AM (Additive Manufacturing) is an increasingly widespread technology in the world.This technique was used present work to deposit material on baseplate order find out its ability repair damaged parts (baseplate material).The of AKT1TD martensitic steel aviation and energy industry.The could suffer from corrosion erosion, be potential method for repairing.As a first step, similar deposited.After that, deposition stellite protective layer took place increase corrosionerosion resistance.The...

This paper deals with the evaluation of material properties additively manufactured austenistic alloy 08CH18N10T, which is widely used in Czech Republic nuclear power plants Temelín and Dukovany other VVER reactors around world. For purposes utilization additive manufacturing technologies for core components fabrication, two sets samples were prepared from horizontally vertically L-DED printed blocks 08CH18N10T material. Experiments such as microstructure analysis, porosity Vickers hardness...