Control of grain size and sub-structure in plain carbon and high strength low alloy (HSLA) steels—the problem and the prospect

Galibois, A.; Krishnadev, M.R.; Dubé, A.

doi:10.1007/bf02811645

Cited by 24 publications

(12 citation statements)

References 3 publications

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“…In HSLA steels, carbon content is generally kept at a low level with additions of other alloying elements, including copper and boron [1][2][3][4][5]. The reduction in carbon content leads to a significant improvement in toughness and weldability, but loss in strength.…”

Section: Introductionmentioning

confidence: 99%

“…Its precipitation largely depends upon the cooling rate from the austenite region. In general, the addition of copper leads to strengthening and improvement in weld-heataffected zone-cracking resistance, thus reducing and some times eliminating the need for welding preheat [2].The precipitation of copper in steels is known to occur through the formation and growth of copper atom clusters which, at a later stage of ageing, result in incoherent copper precipitates [7]. Boron in steels is known to segregate at the grain and subgrain boundaries [3] and is also reported that the hardenability effect due to boron is strongly influenced by the presence of other alloying elements [8,9].…”

Section: Introductionmentioning

confidence: 99%

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Effect of composition and thermomechanical processing on the ageing characteristic of copper‐bearing HSLA steel

Banerjee¹,

Ghosh

Datta

2000

Scand Jof Metallurgy

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3 alloys of copper‐bearing steels with or without boron have been studied in different thermomechanical controlled processing (TMCP) conditions. The influence of TMCP schedules onto the ageing behaviour in boron‐treated and boron‐free steels is examined. The structure property analysis of these steels is also carried out. It is found that when the finish rolling is carried out above Ar3, the steels direct cooled after TMCP are able to retain a higher amount of copper in solid, leading to higher ageing response. Boron is found to delay the precipitation of copper and the best ageing effect is recorded in B‐Cr steel.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of composition and thermomechanical processing on the ageing characteristic of copper‐bearing HSLA steel

Banerjee¹,

Ghosh

Datta

2000

Scand Jof Metallurgy

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“…The yield strength of some HSLA steels can reach as high as 690 MPa, which is more than twice higher than the strength (in the range 170-250 MPa) of typical plain carbon steels [1][2][3][4]. The high strength of HSLA steels is believed to stem from their microstructural factors such as grain refinement [5,6], precipitation hardening [7,8], and inclusion shape control [9,10]. As a specific example, V-microalloyed HSLA (denoted as HSLA-V) steels with ultrafine grains have been found to exhibit an excellent balance of strength and ductility [11,12], and consequently, have been employed in a wide range of applications (for examples, bridges, buildings, vehicles, and pipes) where materials reliability, environmental issues, and fabrication costs are main factors of design considerations [13].…”

Section: Introductionmentioning

confidence: 99%

“…shows the microstructural feature of our samples in three different processing conditions etched with 2% Nital.Fig. 2(a) displays a typical hot band microstructure, in which ferrite (bright phase) and cementite carbides and pearlite (the black agglomeration inside the grains and along ferrite grain boundaries) are distinguishable, in the as-received6 steel. Due to the nature of the etching process the black lines in optical microscopy correspond to chemical differences (ferrite and pearlite), crystallographic texture of the grains, and/or energy differences in the grain boundaries.…”

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confidence: 99%

Microstructural characterization and recrystallization kinetics modeling of annealing cold-rolled vanadium microalloyed HSLA steels

Liu

Olivares

Lei

et al. 2016

Journal of Alloys and Compounds

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In this study, we investigated the microstructural evolution and recrystallization kinetics during the annealing of cold-rolled Vanadium microalloyed HSLA (denoted as HSLA-V) steels using both experimental characterization techniques and theoretical model analysis method. Our experimental results indicate that the recrystallization kinetics can be quantified with the evolution of volume fraction of recrystallization as a function of annealing time, and is strongly dependent on the processing parameters (i.e., cold-rolling reduction and annealing temperature) of the HSLA-V steels. Validated by experimental data, our physics-based model analysis revealed that the recrystallization process in the HSLA-V steels consisted of an early stage with both nucleation and grain growth processes and a later stage with grain growth only. Moreover, the growth of the recrystallized grains was found to follow one dimensional preferential growth mechanism, owing to the dispersed V(C,N) precipitates, in the HSLA-V steels. Consequently, our new analysis model is demonstrated to be useful to gain insights into the recrystallization kinetics in the annealed cold-rolled HSLA-V and even other microalloyed steels.

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“…6) Detailed microstructural analysis of HSLA 100 variety of steels containing a high percentage of austenite formers has been reported elsewhere. 7) However, the role of thermomechanical treatment in the evolution of microstructure and properties in similar steels with low amount of austenite formers, viz. manganese and nickel, is not yet documented well.…”

Section: Introductionmentioning

confidence: 99%

Effect of Thermomechanical Processing on the Microstructure and Properties of a Low Carbon Copper Bearing Steel.

Banerjee¹,

Banerjee²,

Datta³

2001

ISIJ International

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A boron treated copper bearing HSLA steel containing austenite formers like manganese and nickel, somewhat lower in amount than that in HSLA 100 variety of steel is chosen for the study. The role of thermomechanical processing on the microstructure and mechanical properties of the above steel has been investigated. Differential scanning calorimetric study is carried out for understanding the precipitation behaviour of copper in HSLA steel under the influence of boron. The microstructure of the experimental steel is found to consist of laths of martensites and bainite. MA constituents of ribbon like morphology are observed at the lath boundaries. Higher strength properties of the steel are attributed to the presence of finely distributed precipitates of copper and microalloy carbides.

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Control of grain size and sub-structure in plain carbon and high strength low alloy (HSLA) steels—the problem and the prospect

Cited by 24 publications

References 3 publications

Effect of composition and thermomechanical processing on the ageing characteristic of copper‐bearing HSLA steel

Effect of composition and thermomechanical processing on the ageing characteristic of copper‐bearing HSLA steel

Microstructural characterization and recrystallization kinetics modeling of annealing cold-rolled vanadium microalloyed HSLA steels

Effect of Thermomechanical Processing on the Microstructure and Properties of a Low Carbon Copper Bearing Steel.

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