The study presents an investigation of hot deformation behaviour 4340 steel and optimization its processing parameters. isothermal compression tests were performed at the temperatures ranging from 800 to 1200 °C strain rates in range 0.01–100 s−1. changes microstructure steel, resulting processing, have also been studied. workability parameters windows determined, maps correlated with microstructural changes. optimal for forging process determined then numerical modelling industrial...

Abstract The processing maps developed by dynamic material modelling (DMM) method are now widely used in the design of hot forming processes. However, this applies to those processes that relatively fast or carried out under isothermal conditions, when it is possible maintain deformation parameters within window. In case multi-stage free forging, temperature successively decreases during subsequent operations and increased inter-process reheating. Under such direct form not applicable....

This paper analyses the impact of thermomechanical processing history on microstructure and behavior Ti-3Al-8V-6Cr-4Zr-4Mo titanium alloy. The alloy was deformed in compression at various temperatures strain rates, flow stress curves were elaborated basing testing data. analysis material different temperature rate ranges performed taking into account criteria stability instability ­(Semiatin-Lahoti criterion Murty’s criterion) under conditions. It shown, that inhomogeneity alloy’s initial...

Abstract Ti-6Al-4V alloy is widely used, mainly in aircraft industry, due to its low density, excellent corrosion/oxidation resistance and attractive mechanical properties. This has relatively formability, so forming parts of complex geometries out this requires precisely controlled thermomechanical processing parameters. In industrial conditions usually processed by forging or extrusion. applied for structural aircrafts, which are often exposed variable loads high cyclically changing strain...

The flow behavior of metastable β titanium alloy was investigated basing on isothermal hot compression tests performed Gleeble 3800 thermomechanical simulator at near and above transus temperatures. stress curves were obtained for deformation temperature range 800–1100 °C strain rate 0.01–100 s−1. compensated constitutive model developed using the Arrhenius-type equation. high correlation coefficient (R) as well low average absolute relative error (AARE) between experimental calculated data...

Steel forging tools are subjected to a number of tribological wear mechanisms depending on the geometry and surface tool flow material. Thus, there is no single general mechanism, only predominant in this case can be indicated. The problem has been known for years, but due its complexity research it still relevant. In study, various hot work analyzed basis original research. Moreover, influence micro- macrostructure material mechanical, physical, technological characteristics susceptibility...

Grain-oriented electrical steel (GOES) has been used for many years application in transformed cores due to its excellent magnetic properties. Magnetic properties are strongly influenced by obtaining a texture with certain orientation (110) [001] BCC structure. This is related the easy direction of magnetization [001]. So far, main research focused on strong last stages process. The aim present study was additionally trace textural changes slab after continuous casting (CC) process and sheet...

Abstract The microstructural evolution of titanium alloys under high-temperature conditions plays a key role in determining their mechanical properties and hot working behavior. This research presents an advanced method for calibrating β phase reconstruction software using situ testing on Grade 2 titanium, which achieves accurate the parent microstructure. In addition, unique observations forging Ti-6246 alloy are highlighted, demonstrating influence deformation parameters resulting grain...

The stress-strain curves for nickel-based superalloy were obtained from isothermal hot compression tests at a wide range of deformation temperatures and strain rates. material constants activation energy the investigated calculated. accuracy constitutive equation describing behavior this was confirmed by correlation coefficient linear regression. distribution Q as function rate temperature presented. processing maps generated upon basis Prasad stability criterion true strains ranging 0.2 to...

Abstract The paper presents the analysis of hot deformation behavior Ti-6Al-2Sn-4Zr-6Mo (Ti-6246) alloy using theory dynamic material modeling (DMM) based on compression tests performed to a total true strain 1 at rates from 0.01 100 s −1 and temperatures within range between 800 1100 °C. processing maps according Prasad’s criterion were developed. allowed for placement domains describing areas potentially favorable combinations parameters. microstructure observations investigated specimens...

The erosion phenomenon has a significant influence on many metallic materials used in numerous industrial sectors. In this paper, we present the results of an analysis abrasive impact surface and properties DC03/1.0347, DC04/1.0338, DC05/1.0312, DD14/1.0389 deep drawing steels. chemical composition, static tensile tests, hardness drawability microstructure analysis, roughness, plates were investigated. wear mechanisms behavior investigated steels also discussed. obtained study allowed...

Hardfacing is one of the techniques used for part lifecycle elongation. Despite being over 100 years, there still much to discover, as modern metallurgy provides more and sophisticated alloys, which then have be studied find best technological parameters in order fully utilize complex material properties. One most efficient versatile hardfacing approaches Gas Metal Arc Welding technology (GMAW) its cored-wire equivalent, known FCAW (Flux-Cored/Cored Welding). In this paper, authors study...

Abstract The hot deformation behavior of Ti-10V-2Fe-3Al alloy obtained by the powder metallurgy (PM) method was investigated. Material for research produced blending elemental powders followed uniaxial pressing. Thermomechanical tests compacts were carried out to determinate stress-strain relationships at temperature range 800 °C 1000 and strain rate between 0.01 10 s −1 . Based on dynamic material model (DMM) theory, processing maps constant value developed using data from compression...

The hot deformation behavior of powder metallurgy Ti-10V-2Fe-3Al alloy was investigated by compression tests conducted in the temperature range 800 – 1000 °C and strain rate 0.01 - 10 s-1. Flow stress data, average activation energy, Zener-Hollomon parameter were developed order to investigate effects variable conditions on microstructure evolution. determined value energy for allows predict dynamic restoration mechanism taking place during working. found be about 162 kJ/mol which is...

Abstract The influence of the induction sintering process at different temperatures on behavior powder metallurgy Ti-5Al-5Mo-5V-3Cr alloy was investigated. Material for research produced by elemental blending, followed uniaxial cold compacting process. Powder compacts were heated and sintered within temperature range 1000 °C to 1300 °C. influences parameters material during its properties studied. microstructure examination performed with particular attention pore size distribution as well...

Abstract The influence of the total deformation amount on microstructure and selected properties Ti-6Al-4V alloy was determined in this study. Multi-axis compression tests MaxStrain module were performed to obtain large strains. Starting material for research obtained by powder metallurgy (PM) route. Plastically processed cast same chemical composition as PM also tested reference material. with cooling samples between successive stages, which allowed simulation temperature drop occurring...

The Analysis of Multistage Deep Drawing AA5754 Aluminum Alloy This work is focused on the multistage deep drawing aluminum alloy box-type part with flange. Both experimental and numerical analysis were performed in this study to predict causes contraction cracking occurring deformed product respect changes friction conditions tool-drawn contact surface. simulations using eta/DYNAFORM software LS-DYNA® solver. research showed, that results simulation are very good agreement real processes....

REKRYSTALIZACJA STOPU INCONEL 718 INDUKOWANA ODKSZTAŁCENIEM

FEM Modelling and Experimental Research of Die Forging Ni-Mo-Fe Alloy Antenna Components This work was focused on the design hot forging process for a selected element alloy. The research included numerical simulation, testing in industrial conditions as well laboratory tests. simulation prepared performed with application QForm software. Next, tests analyzed were conditions, parameters used simulation. properties obtained determined. metallographic examination also performed, including...

This paper presents the results of investigations properties saddle-shaped copper alloy chips briquettes produced in a roller press. The physical and mechanical investigated were examined on their external surfaces as well cross-sections. density, chemical composition, microstructure analysis obtained with 3D scanning microscope, surface roughness hardness investigated. research proved differentiation depending area surface. changes porosity cross-section showed zones various densification...