Delamination of Pearlitic Steel Wires: Role of Strain Partition on Mechanical Properties of Pearlitic Wires

2021 ◽  
Vol 1016 ◽  
pp. 413-417
Author(s):  
Akula Durga Vara Prasad ◽  
Subrata Mukherjee
Keyword(s):  
Steel Wire ◽  
Cold Drawing ◽  
Pearlitic Steel ◽  
Wire Drawing ◽  
Strain Partitioning ◽  
Strain Mode ◽  
Steel Wires ◽  
Torsional Properties ◽  
Multiple Stages

Cold drawn wires were produced by drawing the pearlitic wire rod (5.5 mm diameter). Cold drawing involved multiple stages to a final drawing strain of ≈ 2.5. The cold drawing alters the pearlite morphology. During the wire drawing, the change in morphology is location dependent. This will create the gradient in stain and strain mode between the surface and the center. This led to have a strain partition among ferrite and cementite phases. The strain partitioning plays a major role in the final tensile and torsional performance of the cod drawn wire. The present work dealt with the experimental and their numerical simulations of stress gradients and the role of pearlite morphology on tensile and torsional properties of the pearlitic steel wire.

Effect of Thermal-Mechanical Treatment on Texture and Properties of Cold-Drawn Steel Wire

2012 ◽  
Vol 629 ◽  
pp. 192-197
Author(s):  
Fan Yang
Keyword(s):  
High Performance ◽  
Mechanical Treatment ◽  
Steel Wire ◽  
Local Stress ◽  
Cold Drawing ◽  
Pearlitic Steel ◽  
Fiber Texture ◽  
Optimum Process ◽  
Texture Characteristic ◽  
Steel Wires

Thermal–mechanical treatment is widely utilized by steelmakers to optimize the properties of high–strength cold drawing eutectoid steel wires. This paper presents the influence of industrial thermal–mechanical treatment utilized in practical manufacturing on microstructure and mechanical properties of drawn pearlitic steels. After post thermal–mechanical processing, drawn pearlitic steel features lower residual stress and improved yield/ultimate tensile strengths, and exhibits a more perfect fiber texture characteristic. Nevertheless, the torsion test of treated steel wire demonstrates that delamination occurs during torsional deformation, which implicates that the studied thermal–mechanical treatment is whereas not the optimum process for manufacturing the high–performance steel wires. The sequential TEM observation shows the remarkable different structure of pearlite lamellae in drawn and treated wires. The local stress concentration resulting from the separately granular cementite precipitation may attribute to the delamination of steel wire after post drawing.

Structure Evolution in Steel Wires During Drawing

2011 ◽  
Vol 194-196 ◽  
pp. 218-223 ◽  
Author(s):  
Hai Bo Huang ◽  
Lei Wang ◽  
Fan Li
Keyword(s):  
Amorphous Phase ◽  
Steel Wire ◽  
Cold Drawing ◽  
Wire Drawing ◽  
Fiber Texture ◽  
Structure Evolution ◽  
Strength Increase ◽  
Steel Wires ◽  
The Wire ◽  
The Relationship

In present research, the structure evolution of the pearlite steel wire during cold drawing is systematically investigated, and the relationship between structure evolution and strength increase during wire drawing is analyzed. During cold drawing, the wire strength increases; inter-lamellar spaces of the pearlites decrease, which has an important effect on properties of cold drawn wires; accumulation of high density dislocation in ferrite phase can be thought to be one of the reasons for strengthening the wire, meanwhile, the amorphous phase forming in cemetites also make the wire strengthen; especially, the wire strength is effected seriously by the intensity of the fiber texture <110>, and as drawing, the wire strength increases.

scholarly journals Role of Non-Metallic Inclusions in the Fracture Behavior of Cold Drawn Pearlitic Steel

Metals ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 962
Author(s):  
Jesús Toribio ◽  
Francisco-Javier Ayaso ◽  
Beatriz González
Keyword(s):  
Fracture Behavior ◽  
Steel Wire ◽  
Cold Drawing ◽  
Pearlitic Steel ◽  
Scientific Work ◽  
Prestressing Steel ◽  
Metallic Inclusions ◽  
Relevant Role ◽  
Hot Rolled

In this paper an exhaustive scientific work is performed, by means of metallographic and scanning electron microscope (SEM) techniques, of the microstructural defects exhibited by pearlitic steels and their evolution with the manufacturing process by cold drawing, analyzing the consequences of such defects on the isotropic/anisotropic fracture behavior of the different steels. Thus, the objective is the establishment of a relation between the microstructural damage and the fracture behavior of the different steels. To this end, samples were taken from all the intermediate stages of the real cold drawing process, from the initial hot rolled bar (not cold drawn at all) to the heavily drawn final commercial product (prestressing steel wire). Results show the very relevant role of non-metallic inclusions in the fracture behavior of cold drawn pearlitic steels.

Anisotropic Fatigue & Fracture Behaviour in Hot-Rolled and Cold-Drawn Pearlitic Steel Wires

2016 ◽  
Vol 713 ◽  
pp. 103-106 ◽  
Author(s):  
Jesús Toribio ◽  
Beatriz González ◽  
Juan Carlos Matos
Keyword(s):  
Mixed Mode ◽  
Fracture Behaviour ◽  
Steel Wire ◽  
Cold Drawing ◽  
Pearlitic Steel ◽  
Mode I ◽  
Prestressing Steel ◽  
Wire Fatigue ◽  
Hot Rolled

This paper analyses the role of cold drawing in the fatigue and fracture behaviour of pearlitic steels with distinct drawing degree (a hot rolled bar and a commercial prestressing steel wire). Fatigue crack growth develops globally in mode I and locally in mixed mode in both steels, the micro-crack deflection angle depending on the drawing degree. With regard to fracture behaviour, it takes place in mode I in the hot-rolled bar and in mixed mode (with a strong component of mode II) in the case of the cold-drawn wire, so that strength anisotropy appears in the drawn steel and a sort of directional toughness can be defined.

Micro- and Macro-Approach to the Fatigue Crack Propagation in High-Strength Pearlitic Steel Wires

2007 ◽  
Vol 348-349 ◽  
pp. 681-684 ◽  
Author(s):  
Jesús Toribio ◽  
B. Gonzáles ◽  
Juan Carlos Matos ◽  
F.J. Ayaso
Keyword(s):  
Fatigue Cracks ◽  
Crack Opening ◽  
High Strength ◽  
Cold Drawing ◽  
Pearlitic Steel ◽  
Fatigue Behaviour ◽  
Eutectoid Steel ◽  
Opening Displacement ◽  
Steel Wires

This paper analyzes how the cold drawing process influences the fatigue behaviour of eutectoid steel, with special emphasis on the role of microstructural changes induced during such a manufacturing process. Fatigue cracks are transcollonial and exhibit a preference for fracturing pearlitic lamellae, with non-uniform crack opening displacement values, micro-discontinuities, branchings, bifurcations and frequent local deflections that create microstructural roughness. The net fatigue surface increases with cold drawing due to the higher angle of crack deflections.

Atomic scale investigation of redistribution of alloying elements in pearlitic steel wires upon cold-drawing and annealing

2013 ◽  
Vol 132 ◽  
pp. 233-238 ◽  
Author(s):  
Y.J. Li ◽  
P. Choi ◽  
S. Goto ◽  
C. Borchers ◽  
D. Raabe ◽  
...  
Keyword(s):  
Cold Drawing ◽  
Pearlitic Steel ◽  
Atomic Scale ◽  
Alloying Elements ◽  
Steel Wires

Cold-Drawn Pearlitic Steels as Hierarchically Structured Materials: An Approach to Johann Sebastian Bach

2018 ◽  
Vol 774 ◽  
pp. 492-497 ◽  
Author(s):  
Jesús Toribio
Keyword(s):  
Level Structure ◽  
Cold Drawing ◽  
Pearlitic Steel ◽  
Johann Sebastian Bach ◽  
Structured Materials ◽  
Hierarchical Microstructure ◽  
Steel Wires ◽  
Manufacture Process ◽  
Microstructural Integrity ◽  
Assisted Fracture

This paper analyzes the hierarchical microstructure of cold-drawn pearlitic steels. To this end, environmentally assisted fracture behavior and microstructural integrity in aggressive environments is analyzed in progressively cold-drawn pearlitic steels based on their microstructural evolution during the multi-step cold drawing manufacture process producing a slenderizing and orientation of the pearlitic colonies (first microstructural level), and orientation and densification of the ferrite/cementite lamellae (second microstructural level). Thus the microstructure of the cold-drawn pearlitic steel wires becomes progressively oriented as the cold-drawing degree increases and this microstructural fact affects their macroscopic behavior, inducing anisotropic fracture behavior and crack path deflection in aggressive environments. In addition, the hierarchical microstructure of cold-drawn pearlitic steel wires in two microstructural levels (colonies and lamellae) suggests a consideration of them as hierarchically structured materials (HSM). Furthermore, an analogy is established in the paper between the microstructural arrangement in cold-drawn pearlitic steels and the multi-level structure of Johann Sebastian Bach’s music.

Effect of interlamellar spacing on cementite dissolution during wire drawing of pearlitic steel wires

2000 ◽  
Vol 42 (5) ◽  
pp. 457-463 ◽  
Author(s):  
Wong Jong Nam ◽  
Chul Min Bae ◽  
Sei J Oh ◽  
Soon-Ju Kwon
Keyword(s):  
Interlamellar Spacing ◽  
Pearlitic Steel ◽  
Wire Drawing ◽  
Steel Wires ◽  
Cementite Dissolution

Evolution of cementite morphology in pearlitic steel wire during wet wire drawing

2010 ◽  
Vol 61 (1) ◽  
pp. 65-72 ◽  
Author(s):  
Xiaodan Zhang ◽  
Andrew Godfrey ◽  
Niels Hansen ◽  
Xiaoxu Huang ◽  
Wei Liu ◽  
...  
Keyword(s):  
Steel Wire ◽  
Pearlitic Steel ◽  
Wire Drawing

Cementite Decomposition of Pearlitic Steels during Cold Drawing

2007 ◽  
Vol 26-28 ◽  
pp. 45-50 ◽  
Author(s):  
Juraj Balak ◽  
Xavier Sauvage ◽  
Duk Lak Lee ◽  
Choong Yeol Lee ◽  
Philippe Pareige
Keyword(s):  
Dissolution Rate ◽  
Three Dimensional ◽  
Cold Drawing ◽  
Pearlitic Steel ◽  
Atom Probe ◽  
Ferrite Phase ◽  
Alloying Elements ◽  
Steel Wires

Microstructures of cold drawn pearlitic steel wires were investigated by three-dimensional atom probe (3D-AP) to understand the influence of alloying elements on the decomposition of cementite. Before cold drawing, Si is mostly located in the ferrite phase, while Cr is located in the Fe3C phase and the amount of Mn is similar in Fe3C and in ferrite. Higher Si amount leads to higher dissolution rate of cementite and Cr has a little effect on cementite decomposition during drawing.

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