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Showing 1 to 20 of 23 for “"Transformation Induced Plasticity"”.
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Transformation induced plasticity in ceramics
Transformation induced plasticity was investigated in a model ceramic. The effect upon toughness of the martensitic transformation from the cubic (paraelectric) to the tetragonal ( ferroelectric) phase in BaTiO3 was determined. The K1C fracture toughness, as measured by the hardness indentation …
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High-strength transformation-induced plasticity steels with reverted interlath austenite
… the alloy composition to promote diffusive transformation. To promote local displacive austenite reversion, the enrichment of austenite stabilizer at the martensite boundaries is introduced before reversion. To promote the diffusional transformation process, computational alloy design is …
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Stress Corrosion Cracking of a Transformation Induced Plasticity Fe39Mn20CO20Cr15Si5Al1 High Entropy Alloy
… Fe39Mn20Co20Cr15Si5Al1 (at. %) HEA exhibits transformation-induced plasticity (TRIP) behavior and shows the transformation from γ (face-centered cubic) to ɛ (hexagonal closed pack) phase. The TRIP Fe39Mn20Co20Cr15Si5Al1 (at. %) HEA consists of two phases: the ɛ – martensite phase (hexagonal …
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The numerical modelling of transformation induced plasticity in the deep drawing of stainless steel
… the effect of the martensite formation on the plasticity of the steel. The model was developed from existing work as a modified von Mises isotropic hardening elastic-plastic algorithm. The algorithm was implemented as the subroutine UMAT in the finite element program ABAQUS. Finite element …
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Modelling of welding with various constitutive models for steel
… of inelastic theories of continua: unified viscoplasticity based on dislocation density theory, unified viscoplasticity based on potential theory, and transformation induced plasticity have been chosen for quantitative investigation. Material models proposed by Anand, Estrin and Mecking, Estrin, …
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Resetting microstructures and properties in TRIP-assisted advanced high strength steels
… resettable alloys. One resettable alloy is the transformation-induced plasticity-maraging (TRIP-maraging) steel. However, current resettable TRIP-maraging steels require long and unfeasible resetting treatments. The limit of resetting kinetics has not been reached and the microstructure …
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Development of third generation advanced high strength steels
… in a steel exhibiting multiple martensitic transformation induced plasticity (γ -austenite→(ε-martensite->α-martensite). A strain hardening exponent as high as 1.4 was observed with ultimate tensile strength and elongation as high as 1,165 MPa and 34%"--Abstract, page iv.</p>
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Overcoming the limits of strain-induced martensitic transformation in metastable face-centered cubic alloys
… metallic alloys. Amongst them, martensitic phase transformations activated by plastic straining are considered as one of the most effective pathways to promote strength while preserving desirable ductility. The resultant transformation-induced plasticity effect has enabled great success in …
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PERITECTIC BEHAVIOR DETECTION AND PREDICTION IN Fe-C-Si-Mn-Al SYSTEM
… such as Advanced high strength steels (AHSS), transformation induced plasticity (TRIP) steels, abrasion-resistant steels, advanced armor plate steels, and many newly proposed steel grades that contain high levels of silicon, manganese, and aluminum.</p> <p>The shell growth non-uniformity …
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Microscopic Strain Localization and Damage in Multi-phase Alloys
… alloys, an (α+β) titanium alloy and (α+α’+γ) transformation-induced plasticity (TRIP)-assisted steel. This thesis focuses especially on the effects of local texture, mechanical twinning, and mechanically-induced phase transformation. First, we study the influence of local crystallographic …
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Understanding the effect of aluminium on the microstructure on low level nitrogen steel
… recently as a possible replacement for Si in Transformation Induced Plasticity (TRIP) steels. Although the effect of substitutional elements such as manganese and chromium has been investigated in detail in the last few decades, there has been little research concerned with the effect of Al as …
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Characterization of Stresses and Strains Involved in the Martensitic Phase Transformations
Transformation-induced plasticity (TRIP) steels are an example of steels used in the automotive industry, where strain-induced martensitic transformations, associated plasticity and work hardening, enhance both the strength and ductility of the material. This has enhanced both the passenger safety …
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Evaluation of the formability properties of nitrogen alloyed metastable austenitic stainless steels
… test temperature. At certain alloy compositions, transformation induced plasticity (TRIP) occurs. TRIP depends on the manner in which deformation induced martensite forms in the steels. Incipient necking is resisted if the martensite forms gradually and selectively, preventing propagation of …
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The Effect of Co on the Deformation Response of Fe-Mn Alloys
… and can lead to interesting effects like transformation induced plasticity, twinning induced plasticity, and the shape memory effect. Co is one such alloying agent which has seen use in several alloys which exhibit these behaviors. While Co is known to have an effect on the stacking fault …
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Friction Stir Welding of High-Strength Automotive Steel
… Phase (DP) 590, 780, and 980 steel as well as Transformation-Induced Plasticity (TRIP) 590 steel with thicknesses ranging from 1.2 mm to 1.8 mm were welded using friction stir welding under a variety of processing conditions, including experiments with dissimilar thicknesses. Samples were …
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Experimental investigation and constitutive modeling of the large deformation behavior of anisotropic steel sheets undergoing strain-induced phase transformation
The strain-induced phase transformation from austenite to martensite is responsible for the high strength and ductility of TRansformation-Induced Plasticity (TRIP)- assisted steels. The large deformation behavior of conventional steels is governed by crystallographic slip. In the case of TRIP …
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Quenching and partitioning of plate steel: development of design methodologies
… interest for thicker plate products, to employ transformation-induced plasticity of microstructures containing austenite to enhance toughness and/or wear resistance. The applicability of the Q&P process to plate steel has been explored in this work, considering through-thickness thermal profiles …
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Hydrogen embrittlement resistance in advanced high strength: vanadium bearing and TRIP-assisted steels
… of plastic deformation during RCF is the transformation-induced hydrogen desorption which occurs when retained austenite transforms into martensite. This mechanism can be investigated through studying the HE susceptibility of transformation induced plasticity (TRIP) steels. An intensive …
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The influence of nickel-nitrogen ratio on the deformation behaviour of austenitic stainless steels
… for stretch forming applications, is promoted by transformation-induced plasticity (1RIP), which depends on the manner in which deformation-induced martensite forms during straining. This includes both the rate of martensite formation, and the stage at which the martensite is formed. In …
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Bainitic steel with 30 GPa% characteristics
… produce a bainitic steel by continuous cooling transformation, with a ultimate tensile strength exceeding 1000 MPa and yet having a ductility of 30%. The challenge associated with the development is that the steel must be spot-weldable, which means that the carbon concentration needs to be kept …
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