Clarification of Joining Mechanism and Optimum Conditions in Laser Roll Welding of Magnesium Alloy to Steel

2016 Fiscal Year Final Research Report

• Project/Area Number: 26870281
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Production engineering/Processing studies; Composite materials/Surface and interface engineering
• Research Institution: Mie University
• Principal Investigator: OZAKI Hitoshi 三重大学, 工学研究科, 助教 (90515660)
• Research Collaborator: KUTSUNA Muneharu ; KAIDO Kazuki ; SAITO Kengo
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: レーザロール溶接 / 異種金属接合 / 材料ハイブリッド構造 / マグネシウム合金 / 低炭素鋼

Outline of Final Research Achievements

It is well known that joining of magnesium alloy to steel by conventional joining processes is difficult. In the present work, laser roll welding of magnesium alloy to steel was tried. As a result, existence of the interface layer consisting mainly of Fe and Al was confirmed, and contribution of the layer to joining mechanism was suggested. Moreover, increasing of roller pressure or decreasing of welding speed led to increase of bonding area at the joint interface. Increasing of the bonding area led to increase of the joint strength. In addition, high strength joints, which were not fractured along the interface but in the magnesium alloy sheet, were obtained in tensile shear test.

Free Research Field

レーザ加工