Texture, microstructure and anisotropic properties of IF-steels with different additions of titanium, niobium and phosphorus

Santos, Andrea Pedroza da Rocha; Mota, Thaís Conde da; Segundo, Heber Vieira Gomes; Almeida, Luiz Henrique de; Araújo, Leonardo Sales; Rocha, Adriana da Cunha

doi:10.1016/j.jmrt.2018.04.009

Cited by 23 publications

(7 citation statements)

References 17 publications

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“…IF steels provide excellent formability because of their inherent material characteristics. Low content of C and N interstitial atoms (< 0.003 wt% and < 0.004 wt%), and γ fibre (<111>||ND) crystallographic texture ensures high plastic anisotropy (r value) that supports ductility (da Rocha Santos et al, 2018). The stabilization is done by alloying elements of Ti and Nb, a description of the effect of these alloying elements was carried out by Hoile (2000).…”

Section: Introductionmentioning

confidence: 99%

Limit State of Bake Hardened Stamped Interstitial-free Steel Automotive Parts Caused by Local Thickness Reduction

Klejch,

Schmidová

2024

Period. Polytech. Transp. Eng.

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Current trends in the complex shapes of modern automobiles lead to the need for extremely formable materials for deep drawing applications. In general Interstitial–Free (IF) steels present the solution for this purpose. In addition, the cold stamping process is influenced by a variety of input factors that must be correctly adjusted. An imperfection in one of the inputs may cause stamping defects even with deep drawing materials. Limit states may then appear in the form of cracks or unacceptable thinning in the critically stressed areas of the stamped parts. For this reason, a general focus is placed on the use of non-destructive methods and inspection of stamped parts after stamping for potential subsequent modification of the stamping process. The presented work deals with the material analyses of stamped parts made of Bake-Hardened Interstitial-Free steel, including the local thickness reduction of the material, leading to the occurrence of crack propagation. The focus of the work was placed on the critical influencing factors resulting from the limit states presented. The evaluation of the material flow and the local plastic response was carried out using a cylindrical indentation method. In addition, the SEM analyses showed the importance of the deformation capacity of the surface coating which proved to be one of the decisive parameters for the occurrence of limit states.

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Section: Introductionmentioning

confidence: 99%

Limit State of Bake Hardened Stamped Interstitial-free Steel Automotive Parts Caused by Local Thickness Reduction

Klejch,

Schmidová

2024

Period. Polytech. Transp. Eng.

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“…Renowned automobile construction steelmakers in Japan, Germany, Sweden and the United States are addressing the issues of lower production costs and increasing demands for fuel efficiency, safety and longer vehicle life by increasing the structural strength of the vehicle body while reducing its weight [1,2].…”

Section: Introductionmentioning

confidence: 99%

Forecast and Control of Structure and Properties of Ultra-Low-Carbon Steels

Koval¹,

Куцова²,

Котова³

et al. 2021

Metallofiz. Noveishie Tekhnol.

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Concentration ranges of elements' containing to optimize the composition of 01YuTA, 01YuT steels and to ensure the required set of rolled products properties are obtained using the method of physico-chemical modelling. The effect of rolling deformation modes in the ferritic temperature range on the formation of the structure and on the properties of ultra-low-carbon steel is investigated. The obtained data can be used to control the processes of structure formation and to establish rational technological regimes for the processing of rolled sheet material for automobile and machine-building enterprises.

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“…With the good combination of low yield strength, high plastic anisotropy ratio, and excellent weldability, IF steel has been widely used in automobile manufacturing industry, household appliances, and so on [19]. Numerous works have been conducted on IF steel to remove interstitial elements [20,21] and improve formability [22]. From industrial viewpoints, IF steel is generally produced by the conventional continuous casting and rolling processes, during which reheating and repeated hot rolling steps escalate operation difficulty and energy consumption greatly.…”

Section: Introductionmentioning

confidence: 99%

Simulation of Subrapid Solidification and Secondary Cooling for the Strip Casting of IF Steel

et al. 2021

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A combination of droplet solidification tester and confocal laser scanning microscope was used to simulate subrapid solidification and secondary cooling process pertinent to the strip casting. The IF steel droplet had a delamination structure and the bottom part went through sub-rapid solidification. During secondary cooling, γ/α transformation mechanism belonged to interface-controlled massive transformation and the ferrite grains grew quickly. With the increase of cooling rate, the γ/α transformation temperature decreased and the incubation period and phase transformation duration reduced. The hardness showed a slight increase due to fine-grain strengthening. With coiling temperature increasing from 600 °C to 800 °C, the grain size became larger, precipitates became coarse, and defects in grain were recovered. Consequently, the hardness decreased.

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Texture, microstructure and anisotropic properties of IF-steels with different additions of titanium, niobium and phosphorus

Cited by 23 publications

References 17 publications

Limit State of Bake Hardened Stamped Interstitial-free Steel Automotive Parts Caused by Local Thickness Reduction

Limit State of Bake Hardened Stamped Interstitial-free Steel Automotive Parts Caused by Local Thickness Reduction

Forecast and Control of Structure and Properties of Ultra-Low-Carbon Steels

Simulation of Subrapid Solidification and Secondary Cooling for the Strip Casting of IF Steel

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