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- Title
Deformation characteristics of fine grained magnesium alloy AZ31B thin sheet during rapid gas blow forming.
- Authors
Sun, P.-H.; Wu, H.-Y.; Hsu, W.-C.; Tsai, H.-H.; Huang, C.-C.; Lee, S.
- Abstract
Decreasing the forming time in gas blow forming using fine grained Mg alloy AZ31B thin sheet with a thickness of 0·6 mm was studied in this work. Tensile tests and gas blow forming using stepwise pressurisation profiles were performed to explore the deformation behaviour of a fine grained AZ31B Mg alloy sheet. The alloy sheets were successfully deformed into hemispherical domes using two proposed stepwise pressurisation profiles during gas blow forming. As a result, significant reduction in forming time was achieved. Maximum effective deformation rates of 1·02 × 10-2 and 1·98 × 10-2 s-1 were obtained at 300 and 370°C respectively. It was feasible to form a hemispherical dome with a height of 20 mm in less than 80 s at 370°C. The results confirmed that the thickness distribution along the centreline of the formed dome was sensitive to the pressurisation profiles. A higher thinning effect was observed at 370°C due to the higher deformation rate imposed during forming. Grain growth was not a serious problem for forming even at 370°C, and static grain growth should be the major factor resulting in grain growth during forming.
- Subjects
MAGNESIUM alloys; DEFORMATIONS (Mechanics); STRAINS &; stresses (Mechanics); ALUMINUM alloys; METALLIC composites; MICROSTRUCTURE
- Publication
Materials Science & Technology, 2010, Vol 26, Issue 9, p1095
- ISSN
0267-0836
- Publication type
Article
- DOI
10.1179/026708309X12548155118824