The Influence of Extrusion Process Parameters and Heat Treatment on the Mechanical Properties of High-Strenght Magnesium Alloy
The article consists test results of direct extrusion AZ80A & ZK60A magnesium alloys. Extrusion process was conducted in the temperature range 350°C-450°C at different extrusion speeds (ram speed 0.8 mm/s and 2.8 mm/s). In order to find optimum precipitation strengthening parameters the aging curves have been made. Extruded rods were characterized by mechanical properties in different tempers. Basic structure researches of magnesium alloys have been made.
K. Laue, H. Stenger, Extrusion. American Society for Metals, USA, 152-155 (1981).
J. Michalczyk, T. Bajor, Study on the influence of temperature, velocity and shape tools on the combined process of extrusion and broaching of the deep sleeve with the bottom made of the AZ31 alloy, Archives of Metallurgy and Materials 56, 2, 533-541 (2011).
R. Ye. Lapovok, M. R. Bernett, C. H. J. Davies, Construction of extrusion limit diagram for AZ31 magnesium alloy by FE simulation, Journal of Materials Processing Technology 146, (2004), 408-414, Liu L., Zhou H., Wang Q., Zhu Y., Ding W.: Dynamic Rekrystalization Behavior of AZ61 Magnesium Alloy, Advanced in Technology of Materials and Materials Processing Journal, nr 6, 2004.
ASM Specialty Handbook, Magnesium and Magnesium Alloys, ASM International Materials Park, OH, 2004.
Metals Handbook Ninth Edition, Properties and Selection Non-ferrous Alloys and Pure Metals 2, Metals Park, Ohio, 1979, p.707-832.
S. S. Park, B. S. You, D. J. Yoon, Effect of the extrusion conditions on the texture and mechanical properties of indirect-extruded Mg-3Al-1Zn alloy, Journal of Materials Processing Technology 209, 5940-5943 (2009).
M. Shahzad, L. Wagner, Influence of extrusion parameters on microstructure and texture developments, and their effects on mechanical properties of the magnesium alloy AZ80, Materials Science and Engineering 506, 141-147 (2009).
S. Kleinera, O. Befforta, P. J. Uggowitzer, Microstructure evolution during reheating of an extruded Mg-Al-Zn alloy into the semisolid state, Scripta Materialia 51, 405-410 (2004).
J. Senderski, M. Lech-Grega, B. Płonka, Studies of advanced technologies used in the manufacture of products from aluminium alloys, Archives of Metallurgy and Materials 56, 475-486 (2011).
L. A. Dobrzański, T. Tański, L. Cizek, Z. Brytan, Structure and properties of magnesium cast alloys, Journal of Materials Processing Technology 192-193, 567-574 (2009).
L. Cizek, M. Greger, L. Pawlica, L. A. Dobrzański, T. Tański, Study of selected properties of magnesium alloy AZ91 after heat treatment and forming, Journal of Materials Processing Technology 157-158, 466-471 (2007).
T. T. Sasaki, K. Yamamoto, T. Honma, S. Kamado, K. Hono, A high-strength Mg-Sn Zn-Al alloy extruded at low temperature, Journal of Materials Processing Technology, Scripta Materialia 59, 1111-1114 (2004).
G. Garces, F. Domınguez, P. Perez, G. Caruana, P. Adeva, Effect of extrusion temperature on the microstructure and plastic deformation of PM-AZ92, Journal of Alloys and Compounds 422, 293-298 (2006).
E.F Volkova, Effect of deformation and heat treatment on the structure and properties of magnesium alloys of the Mg- Zn- Zr system, Metal Science and Heat Treatment 48, 508-512 (2006).
H.-Y. Wu, Ch.-Ch. Hsu, J.-B. Won, P.-H. Sun, J.-Y. Wang, S. Lee, Ch.-H. Chiu, S. Torng, Effect of heat treatment on the microstructure and mechanical properties of the consolidated Mg alloy AZ91D machined chips, Journal of Materials Processing Technology 209, 4194-4200 (2009).
G. Liu, J. Zhou, J. Duszczyk, Prediction and verification of temperature evolution as a function of ram speed during the extrusion of AZ31 alloy into a rectangular section, Journal of Materials Processing Technology 186, 191-199 (2007).
P. Skubisz, J. Sińczak, Precision forging of thin-walled parts of AZ31 magnesium alloy, Archives of Metallurgy and Materials 5, 2, 329-336 (2007).
P. Kustra, A. Milenin, M. Schaper, A. Gridin, Multi scale modeling and interpretation of tensile test of magnesium alloys in microchamber for the SEM, Computer Methods in Material Science, quarterly, AGH 9, 2, 207-214 (2009).