high performance low cost steels with ultrafine grained and

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High performance low cost steels with ultrafine grained

1/8/2009& 0183; Liu, X., Lan, H., Du, L. et al. High performance low cost steels with ultrafine grained and multi-phased microstructure. Sci. China Ser. E-Technol. Sci. 52, 2245–2254 2009 . doi.org/10.1007/s11431-009-0218-xCited by: 9

PDF High performance low cost steels with ultrafine

High performance low cost steels with ultrafine grained and multi-phased microstructure August 2009 Science in China Series E Technological Sciences 52 8 :2245-2254

Ultrafine grained steels UFG Steels : Processing -

Ultrafine grained steels with relatively simple and plain chemical compositions, strengthened primarily by grain refinement, have great potential for replacing high strength low alloyed steels. The unique feature of grain refinement is that it is the only strengthening mechanism which

Ultrafine Grained High Strength Low Alloy Steel With High

Request PDF Ultrafine Grained High Strength Low Alloy Steel With High Strength And High Ductility In this study a C-Mn High Strength Low Alloy steel HSLAs was processed by quenching and

A high-performance TRIP steel enhanced by ultrafine

5/8/2017& 0183; The ultrafine-grained UFG steel with a heterogeneous microstructure showed an excellent yield strength 0.9 GPa , high ultimate strength 1.2 GPa and good ductility 25.4% . 3 The obtained excellent strength can be attributed to the ultrafine grains produced during the annealing process and the B2-structured nanoprecipitates introduced during aging.Cited by: 17

High performance steels: Initiative and practice SpringerLink

24/5/2012& 0183; Shi J, Cao W Q, Dong H. Ultrafine grained high strength low alloy steel with high strength and high ductility. Mater Sci Forum, 2010, 654–656: 238–241 CrossRef Google Scholar. 16. Cao W Q, Wang C Y, Shi J, et al. Appli ion of quenching and partitioning to improve the ductility of ultrahigh strength low alloy steel.Cited by: 13

Ultra-Fine Grained Steels Total Materia Article

A further high potential area of ultrafine grained steels is the domain of high strain rate superplasticity at medium and elevated temperatures. In general, the term ultrafine grain is used for average grain sizes between 1 μm and 2 μm in diameter.

PDF Facile route to bulk ultrafine-grain steels for high

To fabri e bulk UFG steels with both high strength and high duc tility by a simple manufacturing route, a typical Fe– 22Mn–0.6C twinning-induced plasticity TWIP steel without solid phase

UltraFine Grained Steels - ResearchGate

1/1/2009& 0183; Equal channel angular pressing of low-carbon steel produces an ultrafine-grained microstructure with an average sub- grain size of 325 nm and both coarse and fine carbides, a microhardness of 330 Yuqing Weng

Ultrafine-grained ferrite steel with dispersed cementite

23/11/2001& 0183; While preserving the easiness of recyclability and weldability in low C–Si–Mn steels, the grain refinement without microalloying was performed for the low C–Si–Mn steel. The ultrafine grain size was carried out for 18 mm thick and 20 m long square bars.Cited by: 75

High Strength-High Ductility Combination Ultrafine

Ultrafine-grained dual-phase UFG-DP steel consisting of ferrite 1.2 μm and martensite 1 μm was uniquely processed via combination High Strength-High Ductility Combination Ultrafine-Grained Dual-Phase Steels Through Introduction of High Degree of Strain at Room Temperature Followed by Ultrarapid Heating During Continuous Annealing of a Nb-Microalloyed Steel SpringerLink

PDF Recent Trends in Producing Ultrafine Grained

Ultrafine grained steels, as processed with the "tempforming" TF process, however, can have 16 times higher impact toughness than the conventional quench and tempered steel.The extremely high impact toughness for this "tempformed" steel is owing to the

UltraFine Grained Steels - ResearchGate

Equal channel angular pressing of low-carbon steel produces an ultrafine-grained microstructure with an average sub- grain size of 325 nm and both coarse and fine carbides, a microhardness of 330

Surface Integrity Analysis when Milling Ultrafine-Grained Steels

& 0183; Low-carbon steels with ultrafine grains <5 µm have been significantly studied due to the gain in mechanical properties aiming at appli ions in high performance components 3. Several processing routes have been formulated for this purpose which are

A low-alloy high-carbon martensite steel with 2.6 GPa

1/10/2018& 0183; A low-alloy and high-carbon martensite steel 0.66% C with ultrafine grains is produced by combination of Tempforming tempering and deforming of a quenched steel and reheating followed by water quenching and low temperature tempering. The size of prior-austenite grains of the steel is reduced to 2.4 μm through this new technique, and its

Ultrafine-grained ferrite steel with dispersed cementite

23/11/2001& 0183; While preserving the easiness of recyclability and weldability in low C–Si–Mn steels, the grain refinement without microalloying was performed for the low C–Si–Mn steel. The ultrafine grain size was carried out for 18 mm thick and 20 m long square bars.

PDF Ultrahigh strength steel wires processed by severe

HPT is shown to produce ultrafine grained ferrite in low-carbon steels with a total equi valent strain of 1.5 16, 17 . The strain-induced ferrite with low-angle boundaries during HPT is

Third generation high strength low alloy steels with

On-line thermo mechanical controlled processing TMCP was conducted to develop the third generation high strength low alloy HSLA steel with high toughness economically. The ultra-low carbon content ensured a high level of upper shelf energy while ultrafine lath martensitic structure transformed from super-thin pancaked austenite during controlled rolling and cooling.

On the Performance Improvement of Steels through

Steels are now considered to be a egory of new materials, which have progressed year by year to meet the market requirements for high performance. Although it is well known that the performance of steel is dependent upon microstructure, the potential of microstructure evolution is really unknown by people at present due to the steadily developing steel metallurgy.

Novel ultra-high-strength Cu-containing medium-Mn

15/8/2017& 0183; 2.1. Fabri ion of duplex lightweight steels. Two lightweight steels composition; Fe-0.5C-12Mn-7Al- 0,3 Cu- <0.02 P S wt% were fabri ed by a vacuum induction melting method. 60 mm-thick plates were homogenized at 1200 °C for 1 h and hot-rolled at 1100 °C–900 °C to produce 2.8 mm-thick sheets.

High Strength-High Ductility Combination Ultrafine

Ultrafine-grained dual-phase UFG-DP steel consisting of ferrite 1.2 μm and martensite 1 μm was uniquely processed via combination High Strength-High Ductility Combination Ultrafine-Grained Dual-Phase Steels Through Introduction of High Degree of Strain at Room Temperature Followed by Ultrarapid Heating During Continuous Annealing of a Nb-Microalloyed Steel SpringerLink

Surface Integrity Analysis when Milling Ultrafine-Grained Steels

& 0183; Low-carbon steels with ultrafine grains < 5μm have been significantly studied due to the gain in mechanical properties aiming at appli ions in high performance components2. Several processing routes have been formulated for this purpose which are supported

High Strength-High Ductility Combination Ultrafine

Ultrafine-grained dual-phase UFG-DP steel consisting of ferrite 1.2 μm and martensite 1 μm was uniquely processed via combination of hot rolling, cold rolling and continuous annealing of a low-carbon Nb-microalloyed steel.

Strengthening Mechanisms of Ultraf ine Grained Dual Phase Steels Developed by New Thermomechanical Processing

& 0183; Ultrafine grained DP UFG-DP steel with an average grain size of about 2 μm was achieved by short intercritical annealing of the 80% cold–rolled duplex microstructure. Tensile testing revealed superior

Third generation high strength low alloy steels with

On-line thermo mechanical controlled processing TMCP was conducted to develop the third generation high strength low alloy HSLA steel with high toughness economically. The ultra-low carbon content ensured a high level of upper shelf energy while ultrafine lath martensitic structure transformed from super-thin pancaked austenite during controlled rolling and cooling.

Martensite phase reversion-induced nano/ ultrafine grained AISI

& 0183; nano sized grains of 85 nm in an ultrafine grained matrix with an average grain size of 480 nm. This microstructure exhibited superior mechanical properties: high tensile strength of about 1280 MPa with a desirable elongation of about 41%, which can pave the

Combination of dynamic transformation and dynamic

14/12/2016& 0183; It should be emphasized that it is the first time to date to obtain such an equiaxed and uniform ferrite structure with ultrafine grain size Fig. 5c and d in low-C steels without high strains

Acta Metall Sin

Liu H P, Sun H E, Liu B, et al. An ultrahigh strength steel with ultrafine-grained microstructure produced through intercritical deformation and partitioning process J . Mater. Des., 2015, 83: 760 38

Microstructures and Mechanical Properties of

The mechanical properties of the reversion-annealed N-bearing steels were enhanced due to both N alloying and grain refinement. The nitrogen N -bearing austenitic stainless steels are new materials with interesting mechanical properties such as high strength and ductility, desirable toughness and work hardening, and good corrosion resistance.

On the Performance Improvement of Steels through

Steels are now considered to be a egory of new materials, which have progressed year by year to meet the market requirements for high performance. Although it is well known that the performance of steel is dependent upon microstructure, the potential of microstructure evolution is really unknown by people at present due to the steadily developing steel metallurgy.

Recent Trends in Producing Ultrafine Grained Steels

Ultrafine grained steels with grain sizes below about 1 μm offer the prospect of high strength and high toughness with traditional steel compositions. These materials are currently the subject of extensive research efforts worldwide. Alloy design is one of the first

High performance ultrafine-grained Ti-Fe-based alloys with

& 0183; High performance ultrafine-grained Ti-Fe-based alloys with multiple length-scale phases15 micrometer-sized β-Ti dendrites embedded in a nanostructured matrix exhibits a high compressive strength of 2400 MPa and 14.5% plastic strain He et al. 2003 . More

Third generation high strength low alloy steels with

On-line thermo mechanical controlled processing TMCP was conducted to develop the third generation high strength low alloy HSLA steel with high toughness economically. The ultra-low carbon content ensured a high level of upper shelf energy while ultrafine lath martensitic structure transformed from super-thin pancaked austenite during controlled rolling and cooling.

Toughening of Low-Alloy Steel by Ultrafine-Grained

Toughening of Low-Alloy Steel by Ultrafine-Grained Structure Development of Fracture Control from Microstructure Design , Fracture Mechanics - Properties, Patterns and Behaviours, Lucas Maximo Alves, IntechOpen, DOI: 10.5772/63797.

Suppression of Twinning and Phase Transformation in an

An ultrafine-grained 304 austenitic 18 wt.%Cr-8 wt.%Ni stainless steel with a grain size of 270 nm was synthesized by accumulative rolling 67 % total reduction and annealing 550 C, 150s . Uniaxial tensile testing at room temperature reveals an extremely high yield strength of 1890 ± 50MPa and a tensile strength of 2050 ± 30MPa, while the elongation reaches 6 ± 1%.

Nano/ultrafine grained austenitic stainless steel through

article osti 22476092, title = Nano/ultrafine grained austenitic stainless steel through the formation and reversion of deformation-induced martensite: Mechanisms, microstructures, mechanical properties, and TRIP effect , author = Shirdel, M., E-mail: mshirdel1989 ut.ac.ir and Mirzadeh, H., E-mail: hmirzadeh ut.ac.ir and Advanced Metalforming and Thermomechanical Processing Laboratory

High strength steels offer the potential to lower CO2

The benefit of using high strength steels is that less material can be used in the vehicle, and so the total weight of components is reduced for the same level of performance. Advanced high strength steels have been in development for more than four decades, but recent years have seen significant advances, with their strength increasing by 10% every year - a feat that no other material comes

Science and Technology of Advanced Materials TOPICAL REVIEW Related content Corrosion resistance of Si Al-bearing ultrafine- grained

& 0183; Science and Technology of Advanced Materials TOPICAL REVIEW Corrosion resistance of Si Al-bearing ultrafine-grained weathering steel To cite this article: Toshiyasu Nishimura 2008 Sci. Technol. Adv. Mater. 9 013005 View the article online for

PDF Nanoengineered steels for structural appli ions

Nano-Engineered Steels for Structural Appli ionsSteel is one of the most widely used engineering materials in the world. Its pre-eminent position amongst the engineering materials arises due to the abundance and low cost of its main constituent, i.e. iron, and its

Advanced Engineering Materials: Vol 22, No 10

High linearity and low hysteresis on the temperature‐dependence of electrical resistance thermoresistivity of CNTYs is observed. The yarn exhibits a thermoresistive sensitivity of ≈−9.5 × 10 −4 K −1 , which decreases ≈30% when it is embedded into a thermoset .

alform® steels: versatile, high performance fine-grained

alform® steels are hot-rolled fine-grained structural steels with optimal cold formability and excellent weldability. Steels in the alform® series are used in the machinery, automotive, and processing industries, and are ideal for highly sophisti ed and efficient

Low carbon ultrafine grained dual phase steels - UBC

Ultrafine grained UFG i.e. grain size of the order 1 µm dual phase DP steels have been investigated using a thermo-mechanical process designed to obtain fine ferrite-carbide aggregates prior to intercritical annealing. The effects of carbon content, alloying additions, initial starting structures and processing parameters like heating and cooling rate on the mechanical properties have

Ultra-Fine Grained Steels eBook, 2009 WorldCat.org

Microstructure refining of low carbon steels produced by Compact Strip --Production CSP --4. Microstructure refining theories of bainitic steels --5. High strength martensitic steels with grain refining --6. Carbide-free bainitic/martensitic multi-phase steels --8.

FABRICATION OF ULTRAFINE GRAINED STEELS Title WITHOUT

& 0183; to their high cost performance and varieties in mechanical properties. In order to utilize the performance of steels more effectively, some projects studying lightweight steel body have

PDF The Nature and Consequences of Coherent

The Development of High Performance Structural Steels for 21st Century Hipers-21 , Pohang Iron and Steel Company and Korean Institute for Metals 2002 Ultrafine Grained Steels N. Tsuji Materials Science 2002 75 Save Alert Research Feed The Chinese 2001

Toughening of Low-Alloy Steel by Ultrafine-Grained

Toughening of Low-Alloy Steel by Ultrafine-Grained Structure Development of Fracture Control from Microstructure Design , Fracture Mechanics - Properties, Patterns and Behaviours, Lucas Maximo Alves, IntechOpen, DOI: 10.5772/63797.

Characteristics of the heat-affected zone in ultra-fine

Previously developed and practically employed low-carbon low-alloy high-strength steels for welded structures are broadly classified into: 1 steels containing few alloying elements and manufacture Characteristics of the heat-affected zone in ultra-fine grained steel

Development of Lightweight Steels for Automotive

5/10/2019& 0183; These attempts demonstrated the outstanding mechanical performance of TWIP steels; however, these trial productions turned to be commercially unsuccessful due to low productivity and high cost . New approaches and further developments are done continuously to reduce these difficulties and make them suitable for automotive parts manufacturing.

Acta Metall Sin

Table 3 Grades and compositions of low strength high ductility and toughness steels with strength of 500 MPa 9 Fig.1 Schematics of hot stamping, quenching and partitioning HS-Q and P process and microstructural evolution A c3 —temperature of all ferrite transform into austenite, M s —onset of temperature of martensitic transformation, γ—austenite, α ' —martensite, α s ' —second

Additively manufactured hierarchical stainless steels with

30/10/2017& 0183; This work demonstrates the potential of additive manufacturing to create alloys with unique microstructures and high performance for structural appli ions. 3D-printed steels with hierarchically

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high performance low cost steels with ultrafine grained and