Comparative study of precipitation behavior and texture formation in cold rolled-batch annealed and cold rolled-continuous annealed interstitial free high strength steels

Ghosh, Pradyut; Bhattacharya, Baby; Ray, R. K.

doi:10.1016/j.scriptamat.2006.12.044

Cited by 51 publications

(27 citation statements)

References 1 publication

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“…% ( ) n x 0 9741 0 0095 3 = - Table 2 shows the normal and planar anisotropy of the annealed samples. The values are lower than the expected for this type of material [23][24][25] . The largest value of r m was 1.45 for the SR90 samples.…”

Section: Resultscontrasting

confidence: 57%

Mechanical Properties and Crystallographic Texture of Symmetrical and Asymmetrical Cold Rolled IF Steels

et al. 2016

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The crystallographic texture developed during cold rolling and subsequent annealing of interstitial free sheet steels aims to increase conformability. For this, it is necessary to obtain partial α-fiber and continuous and homogeneous γ-fiber texture components. In this work, the influence of symmetric (SR) and asymmetric (AR) cold rolling on crystallographic texture and mechanical properties of an interstitial free steel (IF) was investigated. Symmetric cold rolling yields α-and γ-fibers, which are enhanced as deformation increases. Moreover, α-fiber weakening occurs due to recrystallizations, improving formability. The same fibers are produced by asymmetric cold rolling, but in this case, the γ-fiber is slightly shifted in psi, which is one of Euler angles second ROE's notation 1,2 , and more homogeneous than in symmetric rolling. The best mechanical properties were achieved by asymmetric cold rolling/annealed with about 80% deformation.

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Section: Resultscontrasting

confidence: 57%

Mechanical Properties and Crystallographic Texture of Symmetrical and Asymmetrical Cold Rolled IF Steels

et al. 2016

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“…This result could lead to an improved cold work embritlement (CWE) performance of this steel as compared with similar steels reported in literature, where studies on stabilization of IF steels containing (Ti+Nb) have shown that, depending upon the Ti level, as much as 67% of the total Nb may remain in solid solution. 24) This solute Nb has been shown to segregate to grain and sub-grain boundaries thereby improving the CWE otherwise caused by P segregation at the same sites. 20) As indicated by Fig.…”

Section: Precipitation Statementioning

confidence: 99%

Influence of Microalloying Elements on Recrystallization Texture of Warm-Rolled Interstitial Free Steels

Capdevila

Amigó²,

Caballero

et al. 2010

Mater. Trans.

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The addition of microalloying elements such as Ti and Nb to increase the strength of deep drawing quality steels for automotive sheet products might affect the microstructure formed during the annealing after warm rolling in several ways. Firstly, the precipitates can exert a Zener's pinning on growing recrystallized grain, which leads to a sluggish recrystallization kinetics. Secondly, the amount of microalloying elements control the amount of C, N, S, and P in solid solution, which indirectly affects the recrystallization texture obtained after annealing. In this sense, the work carried out with three different interstitial free (IF) and interstitial free high-strength (IFHS) steel grades allows us to conclude that the increase of microalloying additions delays recrystallization kinetics. Moreover, the abrupt texture change observed between as-rolled and annealed material indicates that the nucleation mechanism for recrystallization is more related to classical nucleation at deformed grain boundaries than subgrain rotation (continuous nucleation).

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“…It is likely that during annealing of the cold rolled steel, Fe and Ti instantaneously form some clusters and P starts diffusing in slowly. In case of continuous annealing there is not enough time for the P atoms to diffuse completely, resulting in Fe-Ti compounds with very little or no P. 10) However, such conditions are present during batch annealing and therefore formation of stoichiometric FeTiP particles is possible in the BA-IFHS steels. Figure 5(d) shows presence of Fe-Ti type of precipitates in the CA-IFHS steels.…”

Section: Fetimentioning

confidence: 99%

“…In the recent past, the present authors have shown strong correlation between precipitation and texture formation in IFHS steels. [9][10][11][12] In the present contribution the authors would attempt to focus on the overall precipitation behavior of IFHS steels, taking composition and mill processing parameters as variables.…”

Section: Introductionmentioning

confidence: 99%

Precipitation in Interstitial Free High Strength Steels

Ghosh

Ray

2009

ISIJ Int.

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Comparative study of precipitation behavior and texture formation in cold rolled-batch annealed and cold rolled-continuous annealed interstitial free high strength steels

Cited by 51 publications

References 1 publication

Mechanical Properties and Crystallographic Texture of Symmetrical and Asymmetrical Cold Rolled IF Steels

Mechanical Properties and Crystallographic Texture of Symmetrical and Asymmetrical Cold Rolled IF Steels

Influence of Microalloying Elements on Recrystallization Texture of Warm-Rolled Interstitial Free Steels

Precipitation in Interstitial Free High Strength Steels

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