Abstract
Gas-pressure bulge tests were conducted on Mg alloy AZ31B wrought sheet until rupture at temperatures from 250 to 450°C. The rupture orientation was observed to change with forming pressure, which controls the forming strain rate, at 350 to 450°C. This phenomenon is a result of associated changes in the mechanisms of plastic deformation. At slow strain rates (≤ 3 × 10−2 s−1), cavity interlinkage associated with grain boundary sliding (GBS) creep induced rupture along the sheet rolling direction (RD). At fast strain rates (≥ 3 × 10−2 s−1), flow localization (necking) associated with dislocation-climb-controlled (DC) creep induced rupture along the long-transverse direction (LTD), a result of mild planar anisotropy. Biaxial bulge specimens tested at 250 to 300°C ruptured explosively, hence preventing any further analysis.
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References
A.A. Luo, “Magnesium: Current and Potential Automotive Applications,” JOM, 54 (2002), pp. 42–48.
P.E. Krajewski, “Elevated Temperature Forming of Sheet Magnesium Alloys,” SAE Technical Paper, (2001), Paper Number. 2001–01-3104.
L.H. Pomeroy, “Advantages of Lightweight Reciprocating Parts,” SAE Technical Paper, (1922), Paper Number. 220044.
G.S. Cole, A.M. Sherman, “Light Weight Materials for Automotive Applications,” Material Characterization, 35 (1995), pp. 3–9.
A.I. Taub, “Automotive Materials: Technology Trends and Challenges in 21st Century,” MRS Bulletin, 31 (2006), pp. 336–34
A.I. Taub, P.E. Krajewski, A.A. Lou, J.N. Owens, “The Evolution of Technology for Materials Processing over the Last 50 Years: The Automotive Example,” JOM, 59 (2007), pp. 48–57.
J.G. Schroth, “General Motors’ Quick Plastic Forming Process,” Advances in Superplasticity and Superplastic Forming, E.M. Taleff, P.A. Friedman, P.E. Krajewski, R.S. Mishra, and J.G. Schroth, eds., TMS, Warrendale, PA, 2004, pp. 9–20.
P.E. Krajewski, J.G. Schroth, “Overview of Quick Plastic Forming Technology,” Mat. Sci. Forum, 2007, vol. 551–552, pp. 3–12.
P.A. Sherek, A.J. Carpenter, L.G. Hector, Jr., P.E. Krajewski, J.T. Carter, J. Lasceski, E.M. Taleff, “The Effects of Strain and Stress State in Hot Forming of Mg AZ31 Alloy Sheet,” Magnesium Technology, S.M. Mathaudhu, W.H. Sillekens, N.R. Neelameggham, N. Hort, eds., TMS (2012), pp. 301–306.
G. Giuliano, S. Franchitti, “The Determination of Material Parameters from Superplastic Free-Bulging Tests at Constant Pressure,” International Journal of Machine Tools and Manufacture, 48 (2008), pp. 1519–1522.
F. Abu-Farha, R. Verma, L.G. Hector Jr., “High Temperature Composite Forming Limit Diagrams of Four Magnesium AZ31B Sheets Obtained by Pneumatic Stretching,” Journal of Materials Processing Technology, 212 (2012), pp. 1414–1429.
A.J. Carpenter, “Physics-Based Material Constitutive Models for the Simulation of High-Temperature Forming of Magnesium Alloy AZ31,” PhD Thesis, University of Texas at Austin, (2012).
E. Hsu, J. Szpunar, R. Verma, “Effect of Temperature and Strain Rate on Formability of AZ31 Magnesium Sheet alloy,” SAE Technical Paper, (2006), Paper Number. 2006–01-0258.
E.M. Taleff, L.G. Hector, Jr., R. Verma, P.E. Krajewski, J.K. Chang, “Material Models for Simulation of Superplastic Mg Alloy Sheet Forming,” Journal of Materials Engineering and Performance, 9 (2010), pp. 488–494.
Yin D.L., “Superplasticity and cavitation in AZ31 Mg Alloy at elevated temperatures,” Materials Letters, 59 (2005), pp. 1714–1718.
ASM International, Metals Handbook. Vol. 2: Properties and Selection: Nonferrous Alloys and Pure Metals, (Materials Park, OH, 2002).
F. Bachmann, R. Hielscher, H. Schaeben, “Texture Analysis with MTEX — Free and Open Source Software Toolbox,” Solid State Phenomena, 160 (2010), pp. 63–68.
S.R. Agnew, O. Duygulu, “Plastic Anisotropy and the Role of Non-basal Slip in Magnesium Alloy AZ31B,” Internationaljournal of Plasticity, (2005), pp. 1161–1193.
U.F. Kocks, C.N. Tome, H.-R. Wenk (Eds.), Texture and Anisotropy: Preferred Orientations in Polycrystals and their Effect on Materials Properties, (Cambridge, New York 2000), pp. 204–206.
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Antoniswamy, A.R., Carpenter, A.J., Carter, J.T., Hector, L.G., Taleff, E.M. (2013). The Influence of Deformation Mechanisms on Rupture of AZ31B Magnesium Alloy Sheet at Elevated Temperatures. In: Hort, N., Mathaudhu, S.N., Neelameggham, N.R., Alderman, M. (eds) Magnesium Technology 2013. Springer, Cham. https://doi.org/10.1007/978-3-319-48150-0_34
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