Hierarchical structures in cold-drawn pearlitic steel wire

Zhang, Xiaodan; Godfrey, A.; Hansen, Niels; Huang, Xiaoxu

doi:10.1016/j.actamat.2013.04.057

Cited by 105 publications

(54 citation statements)

References 31 publications

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“…The cumulative plastic strain at the end of the drawing chain, i.e., that necessary for the full reorientation in axial direction of both microstructural levels (hierarchical structures of pearlitic colonies and ferrite/cementite lamellae) ranges between 1.1 and 1.6 for the whole set of steel families analyzed in the present paper. This interval fully agrees with the value of 1.5, reported in the scientific literature [30,31], of the cumulative plastic strain necessary for the aforementioned completion of reorientation.…”

Section: Discussionsupporting

confidence: 79%

Tensile Fracture Behavior of Progressively-Drawn Pearlitic Steels

Toribio

Ayaso

González

et al. 2016

Metals

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Abstract:In this paper a study is presented of the tensile fracture behavior of progressively-drawn pearlitic steels obtained from five different cold-drawing chains, including each drawing step from the initial hot-rolled bar (not cold-drawn at all) to the final commercial product (pre-stressing steel wire). To this end, samples of the different wires were tested up to fracture by means of standard tension tests, and later, all of the fracture surfaces were analyzed by scanning electron microscopy (SEM). Micro-fracture maps (MFMs) were assembled to characterize the different fractographic modes and to study their evolution with the level of cumulative plastic strain during cold drawing.

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Section: Discussionsupporting

confidence: 79%

Tensile Fracture Behavior of Progressively-Drawn Pearlitic Steels

Toribio

Ayaso

González

et al. 2016

Metals

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“…A further reduction in the structural scale down to or below ~10 nm requires an optimization of thermomechanical treatments and structural parameters. Example systems where such a scale may be reached include pearlitic steel wires [9,11,[20][21][22][23][24][25], Cu alloyed with Fe [26] and Ni alloyed with Mo [27]. An extension of the present research will require a validation of the calculated stress profiles on an extremely fine scale together with mechanical testing at high spatial resolution, for example, in-situ TEM testing [28] and nano-indentation.…”

Section: Discussionmentioning

confidence: 99%

“…The shot velocity was ~260 m/s and the coverage was 200 %. Backscatter imaging and electron backscatter diffraction (EBSD) have been applied to quantify the microstructure [9][10][11][12]. The step sizes for EBSD scanning are 1000 nm, 200 nm, 120 nm, 50 nm and 20 nm, chosen according to the fineness of the deformation structure with finer map step sizes used for finer deformation structures.…”

Section: Shot Peened Low Carbon Steelmentioning

confidence: 99%

Local microstructure and flow stress in deformed metals

Zhang

Hansen²,

Nielsen³

2017

IOP Conf. Ser.: Mater. Sci. Eng.

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About quantitative EBSD analysis of deformation and recovery substructures in pure Tantalum C Moussa, M Bernacki, R Besnard et al. Abstract. The microstructure and flow stress of metals are related through many well-known strength-structure relationships based on structural parameters, where grain size and dislocation density are examples. In heterogeneous structures, the local stress and strain are important as they will affect the bulk properties. A microstructural method is presented which allows the local stress in a deformed metal to be estimated based on microstructural parameters determined by an EBSD analysis. These parameters are the average spacing of deformation introduced boundaries and the fraction of high angle boundaries. The method is demonstrated for two heterogeneous structures: (i) a gradient (sub)surface structure in steel deformed by shot peening; (ii) a heterogeneous structure introduced by friction between a tool and a workpiece of aluminum. Flow stress data are calculated based on the microstructural analysis, and validated by hardness measurement and 2D numerical simulations. A good agreement is found over a plastic strain range from ~1 to 5.

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“…A quantidade de grãos ferríticos é reduzida devido ao fato que o aço SAE 1070 apresenta uma concentração de carbono bem próxima ao ponto eutetóide. Nota-se também, que as colônias que são compostas por lamelas alternadas, apresentam diferentes orientações macroscópicas [5]. …”

Section: Resultsunclassified

“…A Figura 2 apresenta a microestrutura do fio de aço trefilado a uma deformação de 2,52. É possível observar, na seção transversal do fio, que há a formação de uma estrutura comumente denominada de ''curling'' devido à fratura das lamelas de cementita e a torção das lamelas de ferrita [5,6]. A fragmentação e a dissolução da cementita durante a deformação é resultado da interação entre as discordâncias e os átomos de carbono [7].…”

Section: Materials Deformadounclassified

Caracterização Da Microestrutura E Comportamento Mecânico De Fios De Aço Perlítico Trefilados

Duarte¹,

Mendes²,

Fontana³

et al. 2018

ABM Proceedings

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ResumoA combinação de propriedades apresentada pelos aços perlíticos permite sua aplicação em diversos segmentos. O objetivo deste trabalho foi caracterizar a microestrutura do aço SAE 1070 deformado via trefilação para a fabricação de fiomáquina. O aço foi trefilado a seco por 12 passes com reduções médias entre 15 e 21%. A caracterização microestrutural foi realizada com o auxílio da técnica de microscopia eletrônica de varredura e microscopia de força atômica. O material teve ainda seu comportamento mecânico avaliado por meio de ensaio de dureza Vickers e ensaio de tração. O material deformado apresentou a estrutura "curling" na seção transversal, enquanto que na seção longitudinal a maioria das lamelas se encontrava alinhadas com a direção de trefilação. Os ensaios de tração e dureza revelaram um aumento considerável da dureza e resistência do material após o processo de trefilação. Palavras-chave: SAE 1070; Trefilação; Caracterização microestrutural. MICROSTRUCTURAL CHARACTERIZATION AND MECHANICAL BEHAVIOR OF PEARLITIC STEEL WIRE DRAWING AbstractThe combination of properties of pearlitic steels allows its application in different segments. The objective of the present work was characterizing the microstructure of SAE 1070 steel wire drawing for manufacturing tire cords. The steel was dry drawn for 12 pass with average reductions between 15 to 21%. The microstructural characterization was performed with the aid of the scanning by electron microscopy and atomic force microscopy. The material mechanical behavior was also evaluated by Vickers hardness and tensile test. The deformed material showed a curling structure in cross section, while in longitudinal section, the majority of the lamellas was aligned with drawing direction. Tensile and hardness tests revealed a significant increase in hardness and strength of the material after the drawing process.

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Hierarchical structures in cold-drawn pearlitic steel wire

Cited by 105 publications

References 31 publications

Tensile Fracture Behavior of Progressively-Drawn Pearlitic Steels

Tensile Fracture Behavior of Progressively-Drawn Pearlitic Steels

Local microstructure and flow stress in deformed metals

Caracterização Da Microestrutura E Comportamento Mecânico De Fios De Aço Perlítico Trefilados

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