Application of heat treatment and hot extrusion processes to improve mechanical properties of the AZ91 alloy

• Autorzy: Reguła, T. , Czekaj, E. , Fajkiel, A. , Saja, K. , Lech-Grega, M. , Bronicki, M.
• Języki publikacji: EN

Abstrakty

EN

The main aim of this paper is to evaluate the effects of hot working (extrusion) and hest treatment on room temperature mechanical properties of magnesium-based AZ91 alloy. The results were compared with as-cast condition. The examined material had been obtained by gravity casting to permanent moulds and subsequently subjected to heat treatment and/or processed by extrusion at 648 K. Microstructural and mechanical properties of properly prepared specimens were studied. R_m, R_p02 and A₅ were determined from tensile tests. Brinell hardness tests were also conducted. The research has shown that hot working of AZ91 alloy provides high mechanical properties unattainable by cast material subjected to heat-treatment. The investigated alloy subjected to hot working and subsequently heat-treated has doubled its strength and considerably improved the elongation - compared with the as-cast material.

Słowa kluczowe

PL

stopy magnezu; obróbka cieplna; wytłaczanie

EN

magnesium alloy; heat treatment; hot working; extrusion

• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2010
• Tom: Vol. 10, iss. 2
• Strony: 141--146
• Opis fizyczny: Bibliogr. 14 poz., il., rys., tab.

Twórcy

autor

Reguła, T.

• Foundry Research Institute, Kraków, Poland,

autor

Czekaj, E.

• Foundry Research Institute, Kraków, Poland

autor

Fajkiel, A.

• Foundry Research Institute, Kraków, Poland

autor

Saja, K.

• Institute of Non-Ferrous Metals-Light Metals Division, Skawina, Poland

autor

Lech-Grega, M.

• Institute of Non-Ferrous Metals-Light Metals Division, Skawina, Poland

autor

Bronicki, M.

• AGH University of Science and Technology, Kraków, Poland

Bibliografia

• [1] Modern Casting, December, 2001 – 2007.
• [2] Fajkiel A. Dudek P., Korzec R.: Magnesium and its alloys – the industry interest revived. Rzeszów – Bystre, 2001 (in Polish).
• [3] Leeflang M. A., Zhou J., Duszczyk J.: Effect of Billet Temperature and Ram Speed on the Behaviour of AZ31 During Extrusion. Magnesium. Red. K. U. Kainer. Wiley-VCH, Wenheim, 2007.
• [4] Oishi Y., Kawabe N., Hoshima A., Okazaki Y., Kishimoto A.: Development of High Strength Magnesium Alloy Wire. SEI Tech Rev. 2003, No 56.
• [5] von Mises R., Angew Z.: Mechanik der plastischen Formhderung von Kristallen. Math. Mech. 1928, nr 8.
• [6] Emley E. F.: Principles of Magnesium Technology. Pergamon Press, Oxford 1966.
• [7] Liu L., Zhou H., Wang Q., Zhu Y., Ding W.: Dynamic Recrystallization Behavior of AZ61 Magnesium Alloy. Advances in Technology of Materials and Materials Processing Journal, 2004, No 6.
• [8] Avedesian M., Baker H.: Magnesium and Magnesium Alloys. ASM International, Materials Park, OH, 1999.
• [9] Reguła T.: Investigating the effect of heat treatment on the mechanical properties of cast AZ91 alloy. AGH University of Science and Technology, Kraków 2007 (in Polish).
• [10] Reguła T., Czekaj E., Lech-Grega M., Bronicki M.: On the possibility of shaping mechanical properties in cast AZ91 magnesium alloy through the application of proper heat treatment process. Prace Instytutu Odlewnictwa Tom 48, nr 1 (in Polish).
• [11] ASTM B661-06: Standard Practice for Heat Treatment of Magnesium Alloys.
• [12] Prowans S.: The structure of alloys. Wydawnictwo Naukowe PWN, Warszawa 2000 (in Polish).
• [13] Wang J. T., Liang M. X., Kuang Q., Gurvan M., Chen G., Xia K.: Microstructure and Mechanical Properties of Alloy AZ31 after Equal Channel Angular Pressing. Materials Forum Volume 29, 2005.
• [14] Mueller S., Mueller K., Reimers W.: Severe Plastic Deformation of AZ31. Magnesium. Red. K. U. Kainer. Wiley-VCH, Wenheim 2007.