Finite Element Modeling of a Non-Isothermal Superplastic-Like Forming Process

Journal Article · Mon Jan 17 00:00:00 EST 2011 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3552472· OSTI ID:21510178

Jun, Liu; Tan, Ming-Jen; Castagne, Sylvie ^[1]; Jarfors, Anders E. W.; Fong, Kai-Soon ^[2]; Bayraktar, Emin ^[3]; Aue-u-lan, Yingyot

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1. Sch. of Mechanical and Aerospace Engineering, Nanyang Technological University, 639798 (Singapore)
2. Singapore Institute of Manufacturing Technology, 638075 (Singapore)
3. Supmeca-Paris, Mechanical Engineering School (France)

Conventional superplastic forming (SPF) has been modified to increase the productivity and reduce some of the drawbacks, such as high forming temperature and high percentage thinning, to suit the automotive industries. One of the modifications was to combine between the conventional SPF and the use of a mechanical preformed blank to form the non-superplastic grade aluminum alloy (AA5083-O). The requirement of high temperature usually results in microstructural defects during forming process. In this paper, finite element modeling was adopted to investigate the superplastic-like forming process using the non-isothermal heating system. In the simulation, two phases (mechanical pre-forming and gas blow for ming) of the process were conducted under different temperatures, where the material was mechanically drawn into the die cavity at 200 deg. C in the first phase, and it formed with gas pressure applied at a global temperature increasing from 400 deg. C to 500 deg. C. Because of the non-isothermal heating of material, it was found that it had enough ductility to flow more easily in the specific zones (die corners and radius). Additionally, FEM results showed that a better formed part can be obtained by the increasing temperature forming, compared to the stable temperature phase.

• OSTI ID: 21510178
• Journal Information: AIP Conference Proceedings, Vol. 1315, Issue 1; Conference: AMPT2010: International conference on advances in materials and processing technologies, Paris (France), 24-27 Oct 2010; Other Information: DOI: 10.1063/1.3552472; (c) 2010 American Institute of Physics; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM ALLOYS
AMBIENT TEMPERATURE
AUGMENTATION
AUTOMOTIVE INDUSTRY
CAVITIES
CRYSTAL STRUCTURE
DEFECTS
DUCTILITY
ELASTICITY
FINITE ELEMENT METHOD
HEATING
HEATING SYSTEMS
MICROSTRUCTURE
MODIFICATIONS
PLASTICITY
SIMULATION
TEMPERATURE RANGE 0400-1000 K
ALLOYS
CALCULATION METHODS
ENERGY SYSTEMS
INDUSTRY
MATHEMATICAL SOLUTIONS
MECHANICAL PROPERTIES
NUMERICAL SOLUTION
TEMPERATURE RANGE
TENSILE PROPERTIES