Extrusion is the plastic deformation process by which a metal is forced to flow by compression through the die orifice of a smaller cross-sectional area than that of the original billet. Since the material is subjected to compressive forces only, the extrusion is an excellent method for breaking down the cast structure of the billet with little or no cracking. Although room temperature (cold) extrusion is also exercised, most metals are extruded hot when the billet is preheated to facilitate plastic deformation. So far, commercial extrusion applications do not utilize preheating materials above the solidus temperature to enter the semisolid range.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
Carnahan RD (ed) (1999) in Avedesian MM and Baker H (1999) Magnesium and magnesium alloys. ASM International, Metals Park, Ohio
Czerwinski F and Kadak D (2005) Process for injection molding semi-solid alloys, US Patent 6,892,790B2, 17 May 2005
Underwood EE (1970) Quantitative stereology. Addison-Wesley, New York
Tzimas E, Zavaliangos A (1999) Mechanical behaviour of alloys in the semisolid state at high solid content. Acta Materialia, 47:517–528
Uggowitzer PJ, Wahlen A (2000) in 6th Conference on Semisolid Processing of Alloys and Composites. Turin, Italy, p 429
Basner T, Pehlke R, Sachdev A (2000) Metallurgical and Materials Transactions A 31:57
Yang YS, Tsao CA (1994) Thixotropic behaviour and structure evolution of A356 alloy in the semisolid state. Scripta Metallurgica et Materialia 30:1541–1546
Czerwinski F (2005) The processing phenomena of semisolid Mg–9%Al–1%Zn alloy at ultra-high contents of the unmelted phase. Materials Science and Engineering A 392 (1–2):51–56
Czerwinski F (2004) Semisolid extrusion molding of Mg–9%Al–1%Zn alloys. Journal of Materials Science 39:463–468
Author information
Authors and Affiliations
Rights and permissions
Copyright information
© 2008 Springer
About this chapter
Cite this chapter
Czerwinski, F. (2008). Semisolid Extrusion Molding. In: Magnesium Injection Molding. Springer, Boston, MA. https://doi.org/10.1007/978-0-387-72528-4_11
Download citation
DOI: https://doi.org/10.1007/978-0-387-72528-4_11
Publisher Name: Springer, Boston, MA
Print ISBN: 978-0-387-72399-0
Online ISBN: 978-0-387-72528-4
eBook Packages: Chemistry and Materials ScienceChemistry and Material Science (R0)