بررسی جهت نورد و هندسه شیار روی رفتار ضربه‌ای آلیاژ آلومینیومAA6061 و AA7020

نوع مقاله : علمی و پژوهشی

نویسنده

• فرزاد سلیمانی

عضو هیئت علمی دانشگاه پیام نور

10.22067/jmme.2024.84343.1124

چکیده

چکیده

رفتار ضربه‌ای آلیاژ آلومینیومAA6061 وAA7020 نورد سرد شده توسط آزمایش ضربه شارپی بررسی شد. چهار جهت طولی نورد و عرضی طویل و عرضی کوتاه (در دو وضعیت قرار گیری شیار) مورد بررسی قرار گرفتند. زوایای شیار مورد آزمایش30، 45، 60 و 90درجه بوده و دماهای آزمایش یخ خشک، صفر درجه، دمای محیط و آب جوش می‌باشند. از هر متغیر دو نمونه جهت اطمینان و دامنه پراکندگی تهیه گردید. همچنین جهت استحکام بخشی آلیاژهای آلومینیوم فوق از عملیات حرارتی رسوب سختی T65 استفاده شد. نتایج نشان داد که با افزایش دما مقدار انرژی ضربه افزایش می‌یابد و با افزایش زاویه شیار مقدار انرژی ضربه کاهش می یابد و نوع شکست ازحالت برشی به تخت و مخلوطی از هر دو تغییر می‌کند. در جهت طولی نورد کمترین مقدار انرژی ضربه را داشته و در جهت عرضی کوتاه بیشترین مقدار انرژی ضربه را دارد.



کلمات کلیدی: انرژی ضربه، جهت شیار، شکست برشی، آلیاژ آلومینیم

کلیدواژه‌ها

• انرژی ضربه
• جهت شیار
• شکست برشی
• آلیاژ آلومینیم

موضوعات

• بیو مواد

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عنوان مقاله [English]

Effect of rolling direction and groove geometry on impact behaviour of AA6061 and AA 7020 aluminum alloys

نویسنده [English]

• Farzad Soleymani

Faculty member of Payam Noor University

چکیده [English]

Impact behavior of cold rolled AA6061 and AA 7020 aluminum alloys were investigated by Charpy impact test. Four longitudinal and long transverse and short transverse (in two groove positions) were studied. The groove angles were 30, 45, 60 and 90 degrees and temperatures tests were dry ice, zero degrees, ambient and boiling water temperatures. Two samples of each variable were taken to ensure the distribution range. Also for strengthening of aluminum alloys T65 precipitation hardening heat treatment was used. The results showed that increasing temperature increased the amount of impact energy and impact energy value decreased with increasing groove angle and failure mode altered from shear to flat and a mixture of both. Samples had the minimum amount of impact energy in the rolling longitudinal direction and the maximum amount of impact energy in the short transverse direction.

About 85% of consumed aluminum are processed products such as cold rolled plates, which use casting ingots as a raw material and turn into the final product with subsequent processes, and during these processes, the microstructure also changes.

Keywords: Impact energy, groove direction, shear failure, aluminum alloy

کلیدواژه‌ها [English]

• Impact energy
• groove direction
• shear failure
• aluminum alloy

مراجع

[1]   D. Dumont, A. Deschamps, Y. Brechet, “On the relationship between microstructure, strength and toughness in AA7050 aluminum alloy,”  Materials Science and Engineering: A, vol. 356, no. 1-2, pp. 326-336, 2003.

[2]   A. Lipski, S. Mroziński, “The effects of temperature on the strength properties of aluminium alloy 2024-T3,”  acta mechanica et automatica, vol. 6, no. 3, pp. 62-66, 2012.

[3]   W. A. N. G. Bo, X. H. Chen, F. S. Pan, J. J. Mao, F. A. N. G. Yong, “Effects of cold rolling and heat treatment on microstructure and mechanical properties of AA 5052 aluminum alloy,”  Transactions of Nonferrous Metals Society of China, vol. 25, no. 8, pp. 2481-2489, 2015.

[4]   M. Tajally, E. Emadoddin, “Mechanical and anisotropic behaviors of 7075 aluminum alloy sheets,” Materials & Design, vol. 32, no. 3, pp. 1594-1599, 2011.

[5]   C. Mondal, A. K. Singh, A. K. Mukhopadhyay, K. Chattopadhyay, “Effects of different modes of hot cross-rolling in 7010 aluminum alloy: Part II. Mechanical properties anisotropy,”  Metallurgical and Materials Transactions A, vol. 44, pp. 2764-2777, 2013.

[6]   J. Champlin, J. Zarkrajsek, T.S. Srivatsan, P.C. Lam, M. Manoharan, “Influence of notch severity on the impact fracture behavior of aluminum alloy 7055,”  Materials and Design, vol. 20, pp. 331-341, 1999.

[7]   O. Engler, M. Crumbach, S. Li, “Alloy-dependent rolling texture simulation of aluminium alloys with a grain-interaction model,”  Acta materialia, vol. 53, no. 8, pp. 2241-2257, 2005.

[8]   ASTM Standard E23-96, “Standard test methods for notched bar impact testing of metallic materials,”  ASTM, Philadelphia, PA, USA, 1998.

[9]   R. Vignjevic, N. K. Bourne, J. C. F. Millett, T. De Vuyst, “Effects of orientation on the strength of the aluminum alloy 7010-T6 during shock loading: Experiment and simulation,”  Journal of applied physics, vol. 92, no. 8, pp. 4342-4348, 2002.

[10] J. Kraner, P. Fajfar, H. Palkowski, G. Kugler, M. Godec, I. Paulin, “Microstructure and texture evolution with relation to mechanical properties of compared symmetrically and asymmetrically cold rolled aluminum alloy,”  Metals, vol. 10, no. 2, pp. 156, 2020.

[11] K. O. Pedersen, T. Børvik, O. S. Hopperstad, “Fracture mechanisms of aluminium alloy AA7075-T651 under various loading conditions,”  Materials & Design, Vol. 32, no.1, pp. 97-107, 2011.

[12] M. Tajally, Z. Huda, H. H. Masjuki, “A comparative analysis of tensile and impact-toughness behavior of cold-worked and annealed 7075 aluminum alloy,” International journal of impact engineering, vol. 37, no. 4, pp. 425-432, 2010.

[13] F.    Goli, R. Jamaati, “Effect of strain path during cold rolling on the microstructure, texture, and mechanical properties of AA2024 aluminum alloy,”  Materials Research Express, vol. 6, no. 6, pp. 066514, 2019.

[14] L.    Zhang, Y. Wang, X. Yang, K. Li, S. Ni, Y. Du, M. Song, “Texture, microstructure and mechanical properties of 6111 aluminum alloy subject to rolling deformation,”  Materials Research, vol. 20, pp. 1360-1368, 2017.

[15] S. K. Panigrahi, R. Jayaganthan, “Effect of rolling temperature on microstructure and mechanical properties of 6063 Al alloy,” Materials Science and Engineering: A, vol. 492, no.1-2, pp. 300-305, 2008.

[16] C. K. Moy, M. Weiss, J. Xia, G. Sha, S. P. Ringer, G. Ranzi, “Influence of heat treatment on the microstructure, texture and formability of 2024 aluminium alloy,”  Materials Science and Engineering: A, vol. 552, pp. 48-60, 2012.

[17] W. M. Lee, M. A. Zikry, “Microstructural characterization of a high-strength aluminum alloy subjected to high strain-rate impact,” Metallurgical and Materials Transactions A, vol. 42, pp. 1215-1221, 2011.