Effects of friction stir welding parameters on the mechanical properties of AA7075-T6

• Autorzy: Hao D. D. , Tra T. H.

Identyfikatory

DOI

10.5604/18972764.1225594

• Języki publikacji: EN

Abstrakty

EN

Purpose: In this paper, the mechanical properties of welded joints of AA7075-T6 obtained using friction stir welding (FSW) with five regimes of ratio of tool rotation speed to weld speed (3.0, 4.0, 7.5, 10.0 and 15.0 rev/mm) are investigated. Design/methodology/approach: FSW welds were fabricated by Friction stir welding machine. The properties of FSW and were identified using temperature and hardness distribution, microstructure, and tensile strength. Findings: The weld heat and grain size rise when the ratio ω/ν or ω is increased. Tensile strength of welded joint is increased when the ratio ω/ν is elevated. An FSW joint can be obtained with the highest tensile strength and strain of about 76% in comparison with that of the base metal. In all cases, tensile fractures take place outside the stirred zone and are locate in either the retreating or advancing side where hardness is the lowest. Research limitations/implications: The paper researches about properties of FSW of AA7075-T6 that focus on tensile strength and some elements relation such as: temperature and hardness distribution, microstructure. Originality/value: The results show that the mechanical properties of AA7075-T6 depended on friction stir welding parameters.

Słowa kluczowe

EN

friction stir welding; welding parameters; microstructure; hardness; tensile strength

PL

zgrzewanie tarciowe z przemieszaniem; parametry spawania; mikrostruktura; twardość; wytrzymałość na rozciąganie

• Wydawca: International OCSCO World Press
• Czasopismo: Archives of Materials Science and Engineering
• Rocznik: 2016
• Tom: Vol. 77, nr 2
• Strony: 58--64
• Opis fizyczny: Bibliogr. 11 poz.

Twórcy

autor

Hao D. D.

• Department of Engineering Mechanics, Nha Trang University, 02 Nguyen Dinh Chieu Street, Nha Trang City, Vietnam

autor

Tra T. H.

• Department of Engineering Mechanics, Nha Trang University, 02 Nguyen Dinh Chieu Street, Nha Trang City, Vietnam

Bibliografia

• [1] ASM Handbook. Volume 2: Properties and Selection: Nonferrous Alloys and Special-Purpose Materials, ASM International Handbook Committee, 1990, 450- 462.
• [2] C.E.D. Rowe, W. Thomas, Advances in tooling materials for friction stir welding, TWI and Cedar Metals Ltd.
• [3] W.M. Thomas, I.M. Norris, D.G. Staines, E.R. Watts, Friction Stir Welding-Process Developments and Variant Techniques, Paper presented at SME Summit, Oconomowoc Milwaukee, USA, 2005.
• [4] R.S. Mishra, M.W. Mahoney, Friction Stir Welding and Processing, ASM International (2007) 1-5.
• [5] American Society for Metals, Metals Handbook 8th Edition, Metallography, Structures and Phase Diagrams, Vol. 8, 1973.
• [6] W.D. Callister, D.G. Rethwisch, Materials Science and Engineering 7th, John Wiley & Sons, Inc., 2007.
• [7] Standards ASTM, E08: Test Methods for Tension Testing of Metallic Materials, 2004.
• [8] D.P. Field, T.W. Nelson, Y. Hovanski, K.V. Jata, Heterogeneity of crystallographic texture in friction stir welds of aluminum, Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science 32/11 (2011) 2869-2877.
• [9] R.W. Ponda, J.F. Bingert, Precipitation and grain refinement in a 2195 Al friction stir weld, Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science 37 (2006) 3593-3604.
• [10] A. Oosterkamp, L.D. Oosterkamp, A. Nordeide, Kissing bond' phenomena in solid-state welds of aluminum alloys, Welding Journal 83/8 (2004) 225- 231.
• [11] Y.S. Sato, H. Kokawa, M. Enomoto, S. Jogan, T. Hashimoto, Precipitation sequence in friction stir weld of 6063 aluminum during aging, Metallurgical and materials transactions A 30 (1999) 3125-3130.

Uwagi

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę (zadania 2017)