High Temperature Mechanical Properties of AZ91 Magnesium Alloy Weld Joint

• Autorzy: Stopyra M. , Adamiec J.
• Języki publikacji: EN

Abstrakty

EN

Magnesium alloys are widely applied in aircraft and automotive industry, due to their low density and high specific strength. Welding methods can be used to join Mg alloy elements and to repair or regenerate defective or worn-out castings. Therefore the influence of weld joint’s microstructure on mechanical properties needs to be studied. In present paper high temperature mechanical properties of AZ91 Mg alloy weld joint was investigated. Tensile tests were conducted in temperature range between 20 and 200°C. Ultimate tensile strength decreased as the temperature increased from 50°C. At temperature up to 150°C rapture occurred in the base metal, at 200°C rupture location switched to the weld fusion zone. Based on metallographic and fractographic observation, the fracture mechanism was described. Macro crack formed from the merger of micro cracks occurring at massive β phase precipitates.

Słowa kluczowe

EN

mechanical properties; AZ91 magnesium alloy; welding method

PL

właściwości mechaniczne; stop magnezu AZ91; metoda spawania

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2013
• Tom: Vol. 13, iss. 1 spec.
• Strony: 181--184
• Opis fizyczny: Bibliogr. 8 poz., rys., tab., wykr.

Twórcy

autor

Stopyra M.

• Faculty of Materials Engineering and Metallurgy, Silesian University of Technology, Krasińskiego, 40-019 Katowice, Poland

autor

Adamiec J.

• Faculty of Materials Engineering and Metallurgy, Silesian University of Technology, Krasińskiego, 40-019 Katowice, Poland

Bibliografia

• [1] Kiełbus, A. & Rzychoń, T. (2011). The intermetallic phases in sand casting magnesium alloys for elevated temperature. Materials Science Forum. 690, 214-217.
• [2] Mahmundi, R., Kabirian, F. & Nemotollahi, Z. (2011) Microstructural stability and high-temperature mechanical properties of AZ91 and AZ91 + 2RE magnesium alloys. Materials and Design. 32, 2583-2589.
• [3] Braszczyńska-Malik, K.(2011). Precipitates of Gamma-Mg17Al12 Phase in Mg-Al Alloys. In F. Czerwinski (Ed.) Magnesium Alloys - Design, Processing and Properties (pp. 95-113), Rijeka, Croatia: InTech.
• [4] Avedesian, M. M., Baker, H. (1999). ASM Specialty Handbook: Magnesium and Magnesium Alloys. Materials Park, OH, USA: ASM International.
• [5] Adamiec, J. (2010). Influence of design factors on weldability of the AZ91E alloy. Archives of Foundry Engineering. 10, 339-345.
• [6] Grzybowska, A., Braszczyńska-Malik, K. (2012). Microstructural Characterization of the As-cast AZ91 Magnesium Alloy with Rare Earth Elements. Archives of Foundry Engineering. 12, 23-26.
• [7] Munitz, A., Cotler, C., Stern, A., Kohn, G. (2001). Mechanical properties and microstructure of gas tungsten arc welded magnesium AZ91D plates. Materials Science and Engineering. A302, 68-73.
• [8] Adamiec, J., Roskosz, S., Cwajna, J., Paśko, J. (2007). Repeatable and reproducible methodology of the AZ91 alloy structure evaluation. Archives of Foundry Engineering. 7, 95-100.