CHARACTERIZATION OF ULTRA ULTRA-FINE GRAINED IF STEEL AND AL-1100 SHEETS PROCESSED BY ACCUMULATIVE ROLL BONDING

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TAMIMI S.; KETABCHI M.; PARVIN N.

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Journal: AMIRKABIR Year:2010 | Volume:20 | Issue:71-C Page(s): 97-105

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Title

CHARACTERIZATION OF ULTRA ULTRA-FINE GRAINED IF STEEL AND AL-1100 SHEETS PROCESSED BY ACCUMULATIVE ROLL BONDING

Author(s)

TAMIMI S. | KETABCHI M. | PARVIN N. | Issue Writer Certificate

Keywords

SEVERE PLASTIC DEFORMATION

ACCUMULATIVE ROLL BONDING (ARB)

ULTRAFINE GRAIN

INTERSTITIAL FREE STEEL

AL-1100

Abstract

SEVERE PLASTIC DEFORMATION (SPD), is a new method to reach ultra ultra-fine grain materials. The aim purpose of this project paper is to investigate whether Accumulative Roll Bonding (ARB), is an effective grain refinement technique for ultra-low-carbon steel strips containing 0.004% C and AL-1100. For this purpose, a number of aAccumulative rRoll bBonding processes were performed at 500oC for iInterstitial fFree and 250oC for AL-1100, with 50% reduction in area in each rolling pass. The mechanical properties after rolling and cooling were obtained, which includes yield and tensile strengths and elongation, were obtained. By increasing the number of aAccumulative rRoll bBonding cycles in iInterstitial fFree steel, the yield point and UTS of these samples increased by 430% and 330%, respectively. Also, elongation was reduced from 50.5% in annealed state to 2.6% after aAccumulative rRoll bonding process. In AL-1100, yield and tensile strengths increased by 130% and 164%, respectively while the elongation dropped from a pre-rolled value of 6.48% to 3.43%. The Ffracture surface of the specimens werefracture surface of the specimens was observed by SEM. For all samplessamples, the hardness distribution along the thickness was directly proportional to the mean grain size according to Hall-Petch relation. The Hhardness of the samples was obtained using micro hardness tests. It was found that both the ultimate achievable grain size achieved, as well as the degree of bonding, depend on number of rolling pass and reduction in the area as a whole. In ilnterstitial fFree steel, mean grain size was obtained using SEM and optical microscopy is about 225nm. Mean grain size in aluminum AL-1100, was estimated is determined about 480nm by SEM. The rolling process was stopped in after seven cycles 7 for AL-1100 and 10 ten cycles for iInterstitial fFree steel, when edge cracking of the edges became pronounced.

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APA: Copy

TAMIMI, S., KETABCHI, M., & PARVIN, N.. (2010). CHARACTERIZATION OF ULTRA ULTRA-FINE GRAINED IF STEEL AND AL-1100 SHEETS PROCESSED BY ACCUMULATIVE ROLL BONDING. AMIRKABIR, 20(71-C), 97-105. SID. https://sid.ir/paper/583727/en

Vancouver: Copy

TAMIMI S., KETABCHI M., PARVIN N.. CHARACTERIZATION OF ULTRA ULTRA-FINE GRAINED IF STEEL AND AL-1100 SHEETS PROCESSED BY ACCUMULATIVE ROLL BONDING. AMIRKABIR[Internet]. 2010;20(71-C):97-105. Available from: https://sid.ir/paper/583727/en

IEEE: Copy

S. TAMIMI, M. KETABCHI, and N. PARVIN, “CHARACTERIZATION OF ULTRA ULTRA-FINE GRAINED IF STEEL AND AL-1100 SHEETS PROCESSED BY ACCUMULATIVE ROLL BONDING,” AMIRKABIR, vol. 20, no. 71-C, pp. 97–105, 2010, [Online]. Available: https://sid.ir/paper/583727/en

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