Investigation of deformation mechanism of superplastic/non-superaplastic clad sheet

2017 Fiscal Year Final Research Report

• Project/Area Number: 16K17989
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Production engineering/Processing studies
• Research Institution: Hokkaido University
• Principal Investigator: Tokunaga Toko 北海道大学, 工学研究院, 助教 (30767299)
• Research Collaborator: MADEJ Lukasz
• Project Period (FY): 2016-04-01 – 2018-03-31
• Keywords: 超塑性変形 / 複合材料 / マグネシウム合金 / アルミニウム

Outline of Final Research Achievements

Deformation mechanism of superplastic/non-superplastic composite was investigated. The composite was fabricated by hot rolling and composed of Mg alloy and pure Al as superplastic and non-superplastic materials, respectively. Microstructure evolution of the composite was investigated at several strains during superplastic deformation by electron backscatter diffraction technique. It has been demonstrated that in the Al part, grain boundary sliding was not occurred and it was deformed inside the grains. On the other hand, in the Mg alloy part, grain boundary sliding was partially occurred. In the Mg part near the Mg/Al interface, twins were observed after 200% of elongation, which implies that the Mg part deformed with the dislocation slip inside grains.

Free Research Field

組織制御学