Morphology and Mechanical Properties of Bainitic Steels Deformed in Unrecrystallized Austenite Region

Fujiwara, K.; Okaguchi, Shuji

doi:10.4028/www.scientific.net/msf.284-286.271

Cited by 12 publications

(15 citation statements)

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“…These projects offer an excellent template for future improvements to TMCP. Examples of technologies that can be combined with TMCP are improved high-heat-input welding technologies to utilize inclusions, as discussed in this paper, improved strength and low temperature characteristics via copper precipitation hardening [82] and the application of a bainite microstructure [83]. There have also been other attempts to use copper in high-strength steels (e.g.…”

Section: Future Prospects For Tmcpmentioning

confidence: 99%

Progress in thermomechanical control of steel plates and their commercialization

Nishioka

Ichikawa

2012

Science and Technology of Advanced Materials

103

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The water-cooled thermomechanical control process (TMCP) is a technology for improving the strength and toughness of water-cooled steel plates, while allowing control of the microstructure, phase transformation and rolling. This review describes metallurgical aspects of the microalloying of steel, such as niobium addition, and discusses advantages of TMCP, for example, in terms of weldability, which is reduced upon alloying. Other covered topics include the development of equipment, distortions in steel plates, peripheral technologies such as steel making and casting, and theoretical modeling, as well as the history of property control in steel plate production and some early TMCP technologies. We provide some of the latest examples of applications of TMCP steel in various industries such as shipbuilding, offshore structures, building construction, bridges, pipelines, penstocks and cryogenic tanks. This review also introduces high heat-affected-zone toughness technologies, wherein the microstructure of steel is improved by the addition of fine particles of magnesium-containing sulfides and magnesium-or calcium-containing oxides. We demonstrate that thanks to ongoing developments TMCP has the potential to meet the ever-increasing demands of steel plates.

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Section: Future Prospects For Tmcpmentioning

confidence: 99%

Progress in thermomechanical control of steel plates and their commercialization

Nishioka

Ichikawa

2012

Science and Technology of Advanced Materials

103

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“…[11] However, it was observed that the bainitic structure was more refined than that after 1 ϭ 0.25 and 2 ϭ 0.47.…”

Section: A Effect Of the Deformation Schedules On The Microstructuramentioning

confidence: 94%

“…The bainitic ferrite laths stop their growth at the cell-structure boundaries, which then reduces their length. [11] This could explain the bainitic structure refinement obtained after this deformation test. On the contrary, in the case of 1 ϭ 0.25 and 2 ϭ 1.2, the dislocation density, which forms the dislocation-cell structure, was low, and the bainitic ferrite laths, which nucleate on the austenite grain boundaries, grow linearly, and stop their growth only on the opposite austenite grain boundaries (Figure 3(c)).…”

Section: A Effect Of the Deformation Schedules On The Microstructuramentioning

confidence: 95%

“…Moreover, the amount of deformation could affect not only the polygonal ferrite grain size, but also the bainite morphology and retained-austenite stability through the prior-austenite grain refinement. [23] The gradual increase in the amount of total strain (Table I) led to the gradual decrease in the resulting austenite thickness and polygonal ferrite grain size. Despite this, the volume fraction of retained austenite and the mechanical properties varied after different deformation tests.…”

Section: A Effect Of the Deformation Schedules On The Microstructuramentioning

confidence: 98%

“…It has been reported that the bainite can be significantly refined by more than 50 pct deformation in the nonrecrystallized region. [11] This can affect the mechanical and chemical stability of retained austenite present within bainite. Furthermore, the thermomechanical processing schedule also influences the transformation behavior, leading to different morphologies of the bainite.…”

Section: Introductionmentioning

confidence: 99%

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Effect of deformation schedule on the microstructure and mechanical properties of a thermomechanically processed C-Mn-Si transformation-induced plasticity steel

Timokhina

Hodgson

Pereloma

2003

Metall Mater Trans A

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Thermomechanical processing simulations were performed using a hot-torsion machine, in order to develop a comprehensive understanding of the effect of severe deformation in the recrystallized and nonrecrystallized austenite regions on the microstructural evolution and mechanical properties of the 0.2 wt pct C-1.55 wt pct Mn-1.5 wt pct Si transformation-induced plasticity (TRIP) steel. The deformation schedule affected all constituents (polygonal ferrite, bainite in different morphologies, retained austenite, and martensite) of the multiphased TRIP steel microstructure. The complex relationships between the volume fraction of the retained austenite, the morphology and distribution of all phases present in the microstructure, and the mechanical properties of TRIP steel were revealed. The bainite morphology had a more pronounced effect on the mechanical behavior than the refinement of the microstructure. The improvement of the mechanical properties of TRIP steel was achieved by variation of the volume fraction of the retained austenite rather than the overall refinement of the microstructure.

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Influence of the Hot Rolling Process on the Mechanical Behaviour of Dual Phase Steel

Asadi

Palkowski

2012

EPD Congress 2012

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Morphology and Mechanical Properties of Bainitic Steels Deformed in Unrecrystallized Austenite Region

Cited by 12 publications

References 0 publications

Progress in thermomechanical control of steel plates and their commercialization

Progress in thermomechanical control of steel plates and their commercialization

Effect of deformation schedule on the microstructure and mechanical properties of a thermomechanically processed C-Mn-Si transformation-induced plasticity steel

Influence of the Hot Rolling Process on the Mechanical Behaviour of Dual Phase Steel

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