Solutions and new processes are continually being developed to produce components demonstrating high strength elongation. This paper focuses on medium manganese steel with a composition of 0.2% carbon, 3% manganese, 2.15% aluminium (by weight percent). The mechanical properties the effect microstructure investigated. sheets shaped into omega profiles using press tool, followed by intercritical annealing samples enhance their ductility. Before experiment, anticipated values were tensile (UTS)...

The use of the combined influence retained austenite and bainitic ferrite to improve strength ductility has been known for many years from treatment multiphase steels. Recently, very fine films along martensitic laths have also become centre attention. This is called Q-P process (quenching partitioning). In this experimental program quenching temperature isothermal holding diffusion carbon distribution three advanced high steels with content 0.43 % was examined. alloying strategies a...

Existing oxide dispersion strengthened (ODS) alloys are, besides Ni-based superalloy single crystals, the most creep-resistant materials. The creep resistance of ODS may, moreover, be significantly improved thanks to increasing volume fraction nano oxides by more than one order magnitude so that play a decisive role in strengthening. present experimental study deals with two systems such high-volume oxides, namely, Fe-11Al-1O and Fe-17Cr-7Al-4Y2O3 prepared mechanical alloying hot rolling...

Martensitic microstructures with a controlled fraction of retained austenite have the potential to reach high tensile strength above 1900-2000 MPa ductility higher than 10 %. These can be obtained by using Q&P process. The process integrated incremental deformation was tested and optimized for two high-strength steels 42SiCr 42SiMn 0.43 % C. steel contained an additional 1.3 Cr. A suitable austenitization temperature determined in first step then quenching partitioning temperatures cooling...

The concepts new types of materials are, for economic reasons, focused mainly on low alloyed steels with a good combination strength and ductility. Suitable heat thermo-mechanical treatments play an important role the utilization these materials. Different alloying strategies are used to influence phase transformations. quenching partitioning process (Q-P Process) is one treatment methods which can result in high ultimate as well However, properties be obtained only if sufficient amount...

Abstract Quenching and partitioning process with incorporated incremental deformation was optimized for six high strength steels various contents of carbon (0.4-0.6%), manganese (0.6-1.2), silicon (2-2.6%) chromium (0.8-1.3%). The optimization gradually done each steel respect to the final microstructures properties. effect cooling rate, quenching temperature on microstructure development further investigated. Interesting combinations mechanical properties were obtained, tensile in region...

Medium manganese steels fall into the category of modern third-generation high-strength steels. Thanks to their alloying, they use a number strengthening mechanisms, such as TRIP and TWIP effects, achieve mechanical properties. The excellent combination strength ductility also makes them suitable for safety components in car shells, side reinforcements. steel with 0.2% C, 5% Mn, 3% Al was used experimental program. Sheets thickness 1.8 mm without surface treatment were formed press hardening...

In connection with increasing needs of different branches industry for steels excellent mechanical properties, like high strength combined ductility on one hand and low or at least moderate costs the other hand, an experimental alloy 42SiCr steel has been developed. If a conventional heat treatment is applied to this material, very can be reached, however unacceptable ductility. Well balanced i.e. about 2000 MPa more than 10 – 15%, achieved by application advanced methods Q-P (quenching...

The application of innovative processing techniques to conventional raw materials can lead new structural with specific mechanical and physical properties, which open up possibilities use in some areas industry.The is enabled by powder metallurgy, utilizes powders consisting a metal matrix dispersed stable particles achieved alloying their hot consolidation rolling.New oxide dispersion strengthened (ODS) Fe-Al-based alloys are tested under different single multiple thermomechanical...

Abstract The effect of processing parameters on the final microstructure and properties advanced high strength CMnSiNb steel was investigated. Several strategies with various numbers deformation steps cooling schedules were carried out, namely heat treatment without deformation, conventional quenching TRIP bainitic hold or continuous cooling. Obtained multiphase microstructures consisted mixture ferrite, bainite, retained austenite M-A constituent. They possessed ultimate tensile in range...

To obtain the superior-high-temperature creep strength, a transformation of fine-grained structure to large grains due abnormal grain growth or recrystallization is an important process in oxide-dispersion-strengthened (ODS) alloys.The processing steel enabled with powder metallurgy, which utilizes powders consisting Fe-Al metal matrix O content, prepared mechanical alloying, and their hot consolidation rolling.The thermomechanical characteristics new ODS alloys are investigated terms...

Although conventional tool steels have been heat treated on a routine basis for decades, the search continues new ways to eliminate their troublesome sharp-edged primary chromium carbides, which impair toughness. One of available techniques is semi-solid processing, involves partial melting workpiece. The structure after processing consisted austenite and carbide-austenite network. network can be broken up its fragments distributed uniformly by subsequent forming with appropriate parameters....

Development of high strength or even ultra-high steels is mainly driven by the automotive industry which strives to reduce weight individual parts, fuel consumption, and CO2 emissions. Another important factor improve passenger safety. In order achieve required mechanical properties, it necessary use suitable heat treatment in addition an appropriate alloying strategy. The main problem these types treatments isothermal holding step. For TRIP steels, temperature lies field bainitic...

New strategy of thermo-mechanical treatment with continuous cooling was proposed and optimised for high strength low alloyed TRIP (transformation induced plasticity) steel 0.2% C, 1.8% Si, 1.5% Mn. Basically all methods steels processing that have been investigated in the last fifteen years incorporated hold bainite region as irreplaceable part processing. This should ensure convenient content final microstructure also sufficient carbon enrichment austenitic areas. described this article...

QP (quenching and partitioning) heat thermo-mechanical treatment was applied to middle carbon, low alloyed CMnSiCr steel. Various numbers of deformation steps different heating cooling rates were tested for this Two treatments accompanied by subsequent annealing step at 250°C (QP-T processing). The effect several processing strategies on mechanical properties microstructures determined tensile tests microstructure analysis carried out the means scanning electron microscopy. Volume fraction...

TRIP (transformation induced plasticity) steels are low alloyed with multiphase microstructure consisting of ferrite, carbide-free bainite and retained austenite. They typically produced by thermo-mechanical treatment, which involves the hold in transformation region. The ensures enough final also helps to stabilize higher amount Due induce plasticity effect; possess very good combination high strength ductility. In response industrial demands, C-Mn-Si C-Mn-Si-Nb were subjected treatment...

In recent years, much research has focused on the use of various materials for relieving and strengthening soil, e.g., steel reinforcing ribs, geosynthetics, geocell, waste tires, expanded polystyrene (EPS). EPS is being used increasingly in geo-infrastructure, a super-light material, to replace part soil decrease ground pressure buried structures. This paper presents experimental numerical analyses effectiveness geocell reinforcement ameliorating behavior unpressurized pipes exposed surface...

The specific mechanical property and structure of a material can be achieved by combining various types materials technologies.The main aim this research is to develop new creep-and oxidation-resistant (ODS) (new ODS Fe-Al based alloys composites) applicable at high temperatures up about 1100 °C.The composites consist ferritic matrix strengthened with volume fractions 2 % 30 Al2O3 particles.In order find the optimum structure, different oxide amounts were added three containers.Also,...

Press-hardening, also known as hot stamping, is a manufacturing process for producing car body parts that must meet the high demands of their mechanical properties and safety parameters. Moreover, these components often require different in component. This work presents press-hardening special combined tool where one half heated other cooled. The cooled part has been 3D printed due to complexity internal cooling channels. aim this investigate variation microstructures sheet metal relation...