Ultrafine grained dual phase steel fabricated by equal channel angular pressing and subsequent intercritical annealing

Park, K.-T.; Han, Seog Young; Ahn, Byung Du; Shin, Dong Hyuk; Lee, Young Kook; Um, Kyung Keun

doi:10.1016/j.scriptamat.2004.06.017

Cited by 82 publications

(26 citation statements)

References 17 publications

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“…[1] Aside from the multiphase concept, these steels benefit in general from a refinement of the microstructure. For fine-grained DP steels, this has recently been demonstrated by Park et al [2] They obtained ultrafine-grained DP steel by equal-channel angular pressing and subsequent intercritical annealing. This steel displayed higher strength and total elongation than coarse-grained DP steel.…”

Section: Introductionmentioning

confidence: 76%

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Grain Refinement in Dual-Phase Steels

Mukherjee

Hazra

Militzer

2009

Metall Mater Trans A

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Section: Introductionmentioning

confidence: 76%

“…The Vicker's hardness number is in kg/mm 2 such that a unit conversion factor has to be introduced into Eq. [2] to obtain the flow stress in MPa (1 H V = 9.81 MPa).…”

Section: E Mechanical Propertiesmentioning

confidence: 99%

Grain Refinement in Dual-Phase Steels

Mukherjee

Hazra

Militzer

2009

Metall Mater Trans A

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“…Bulk metallic materials are usually subjected to severe plastic deformation processes such as equal channel angular pressing, [1][2][3] accumulative roll bonding, [4,5] or hot pressure torsion [6] in order to achieve an UFG microstructure. Whereas these processes were successful in terms of realizing ultra-high strengths, two essential features, i.e., retaining ductility and fracture toughness for shape forming, have proven difficult.…”

Section: Introductionmentioning

confidence: 99%

Localized Deformation in Multiphase, Ultra-Fine-Grained 6 Pct Mn Transformation-Induced Plasticity Steel

Lee

Kumar

et al. 2011

Metall Mater Trans A

189

105

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Multiphase, ultra-fine-grained transformation-induced plasticity (MP UFG TRIP) steel containing 6 mass pct Mn was obtained by cold rolling and intercritical annealing of an initially fully martensitic microstructure. UFG microstructures with an average grain size less than 300 nm were obtained. The amount of austenite in the microstructures, speculated to be formed by diffusionless transformation, was controlled by changing the intercritical temperature. The tensile properties were strongly influenced by the volume amount and the stability of the reversely transformed austenite. The MP UFG TRIP steel was characterized by pronounced localization of the deformation. The deformation band properties were analyzed in detail.

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“…Ultrafine grained structures can be developed in metals by severe plastic deformation techniques (SPD), among which ECAP is a successful method to develop submicron microstructures in bulk steel [4][5][6][7][8][9]. The aim of the present work has been to explore the capability of warm ECAP for developing a stable grain structure and texture in tempered EUROFER 97 that can enhance its mechanical behavior in its operational temperature range, i.e.…”

Section: Introductionmentioning

confidence: 99%

Texture and mechanical properties of EUROFER 97 steel processed by ECAP

Eddahbi

Monge

Fernández

et al. 2011

Materials Science and Engineering: A

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Abstract:The EUROFER 97 steel was processed by equal channel angular pressing (ECAP) at 550 • C for four passes via route C. The starting material consisted of ferrite-martensite dual phase composed by small subgrains of about 0.5 m and low angle boundaries less than 5 • . The volume fraction of second phase particles was around 10 vol.%, besides a texture formed by several fibers orientations belonging to the zone axes 110 , 111 and 112 . Increasing ECAP deformation, this microstructure became into equiaxed grain structures of less than 1 m, and the misorientation between contiguous grains increased. This refine-ment of the microstructure was accompanied by the development of a new texture described by a family of fiber orientations related by rotations around axes 110 and 111 . Tensile tests have revealed that an ECAP treatment at 550 • C for two passes could significantly strengthen the tempered material still maintaining good ductility.

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Ultrafine grained dual phase steel fabricated by equal channel angular pressing and subsequent intercritical annealing

Cited by 82 publications

References 17 publications

Grain Refinement in Dual-Phase Steels

Grain Refinement in Dual-Phase Steels

Localized Deformation in Multiphase, Ultra-Fine-Grained 6 Pct Mn Transformation-Induced Plasticity Steel

Texture and mechanical properties of EUROFER 97 steel processed by ECAP

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