Volume 16, Issue 12 (2-2017)                   Modares Mechanical Engineering 2017, 16(12): 501-508 | Back to browse issues page

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Delfan Abazari H, Seyedkashi S M H, Hoseinpour Gollo M. Experimental study on corrosion behavior of multi-layered sheet metals after laser forming. Modares Mechanical Engineering. 2017; 16 (12) :501-508
URL: http://mme.modares.ac.ir/article-15-965-en.html
1- University of Birjand
2- Associate Professor/Shahid Rajaee Teacher Training University
Abstract:   (4262 Views)
Nowadays, multilayered sheet metals are used in order to achieve a wide range of favorite mechanical, physical, thermal and electrical properties. The laser beam passage over the sheet creates extreme temperature changes which can lead to a change in chemical properties and microstructures. Due to the wide application of these materials in chemical and corrosive environments, corrosion tests were carried out on two-layered SUS304L/copper C11000 and three-layered SUS430/copper C11000/steel SUS430 sheets subjected to various laser passes. Ytterbium fiber laser is used and the governor mechanism during the process is TGM. The changes of microstructures were revealed by metallography. Corrosion resistance of steel layer in three-layered sheet subjected to laser was dropped due to the martensite and oriented ferrite grain size reduction in HAZ. There is no change in microstructure and corrosion behavior of copper layer and the second steel layer due to the HAZ low penetration depth. There is no change in microstructure and corrosion behavior of steel layer in two layered sheet due to the austenitic microstructure. Penetration depth of HAZ in two-layered sheet is limited to a small part of its steel cross section. So, there is no change in microstructure and corrosion behavior of copper, and corrosion is the same all over the copper layer in all specimens.
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Article Type: Research Article | Subject: Metal Forming
Received: 2016/10/1 | Accepted: 2016/11/6 | Published: 2016/12/18

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