Abstract :
Bonding or banding refers to the layering of the steel structure parallel to the flow direction of the material during the working process. This research investigated the amount of ferritic-pearlitic bonding present in the API GRB microalloy steel sheets used in the pipe industry and its effect on the impact energy of these types of steels. The special purpose of this research is to compare the impact properties of banded and non-banded samples in two vertical and parallel rolling directions. Metallographic and impact tests were performed on these samples at -20 and 0 °C in two directions, perpendicular and parallel to rolling. Investigations showed that the impact angle of the sample in relation to the rolling direction is very effective in its impact resistance, that is, while in the rolling direction it decreases the impact resistance, it increases it in the vertical direction.
References:
1- ASTM International,"Metals-MechanicalTesting", Annual Book of ASTM Standards, S.3, Vol. 03.01, 2009.
2- J.D. Verhoeven, "A Review ofMicrosegregation Induced BandingPhenomena in Steels", Journal of Materials
Engineering and Performance, Vol 9, pp. 286-296, 2000.
3- X. P. Liang, "Microstructural evolution of2519-T87 aluminum alloy obliquely impactedby projectile with velocity of 816 m/s",Transactions of Nonferrous Metals Society ofChina, Vol 22, pp. 1270–1279, 2012.
4- S. W. Hwang, "Effects of Al addition onhigh strain rate deformation of fully austenitichigh Mn steels", Materials Science andEngineering: A, 528, pp. 7267–7275, 2011.
5- L. E. Samuels,"Light microscopy of carbonsteels", ASM International, 81-124, 1999.
6- Ch. Harry,"Heat Treater’s Guide, "Practicesand Procedures for Irons and Steels (2ndEdition), ASM international, 1995.
7- L. Hellner and T. O. Norrman, Ann, 152,pp. 269–86, 1968.
8- W. A. Spitzig, "Effect of sulfide inclusionmorphology and pearlite banding onanisotropy of mechanical properties in
normalized C-Mn steels", MetallurgicalTransactions A, Vol 14, pp. 271, 1983.
9- A.S. Bor, Iron Steel Inst. Jpn. Int., 31, pp.1445–46, 1991.
10- E. F. Jatczak. D. J. Girardi and E. S.Rowland, "On banding in steel", Transactions
of American Society of Metals, 48, pp. 279-303, 1952.
11- R.A. Grange, "Effect of MicrostructuralBanding in Steel", Metall Transactions, 2, pp.
417-426, 1971.
12- L.Tau, et al, "Effect of anisotropy on thehydrogen induced fatigue crack propagation ofa banded ferrite pearlite steel", Journal of
marine science and technology, 1, pp. 19-22,1993.
13- M. Z. Shah Khan, "Variable-amplitudefatigue testing of a high hardness armour
steel", Int. J. Fatigue, 20, pp. 233-239, 1998.
14- P. Shanmugam, "Some Studies on theImpact Behavior of Banded MicroalloyedSteel", Engineering Fracture Mechanics, 53,pp. 991-1005, 1996.
15- A. Rohatgi, "Resistance-curve and fracturebehavior of Ti–Al 3 Ti metallic–intermetalliclaminate (MIL) composites", Acta Materialia,51, pp. 2933-2957, 2003.
16- J.J. Mason, AND R.O. Ritchie, "Fatiguecrack growth resistance in SiC particulate andwhisker reinforced P:M 2124 aluminum matrixcomposites", Materials Science andEngineering A, pp. 170-182 , 1997.
17- M.S. Joo, "Experiments To Separate TheEffect Of Texture On Anisotropy Of PipelineSteel", Materials Science &Engineering A,Vol. 556, pp. 601-606, 2012.
18- ح. مناجاتی زاده، "بررسی و تحلیل تاثیر شرایط تولید برمقاومت به ضربه فولادهای میکرو آلیاژی مورد استفاده در لولهسازی با استفاده از شبکه عصبی"، مجله علمی پژوهشی موادنوین، جلد2، شماره3، صفحات 9-1، بهار1391.
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