Microstructure and Mechanical Properties of Duplex Structured Mg-Li-Zn-Y Alloys

• Autorzy: Su J. , Yang Y. , Fu X. , Ma Q. , Ren F. , Peng X.

Identyfikatory

DOI

10.24425/118834

• Języki publikacji: EN

Abstrakty

EN

As-cast Mg-6Li-0.3Zn-0.6Y and Mg-6Li-1.2Zn-1.2Y (wt%) alloys were prepared and extruded at 260 ºC with an extrusion ratio of 25. The microstructure and mechanical behavior of as-cast and extruded alloys are reported and discussed. The results show that Mg-6Li-1.2Zn- 1.2Y alloy is composed of α-Mg, β-Li, and W-Mg3Zn3Y2 phases while Mg-6Li-0.3Zn-0.6Y alloy contains α-Mg, β-Li, W-Mg3Zn3Y2 phase and X-Mg12ZnY. After hot extrusion, the microstructure of specimens is refined and the average grains size of extruded alloys is 15 μm. Dynamic recrystallization occurs during the extrusion, leading to grain refinement of test alloys. Both the strength and elongation of test alloys are improved by extrusion. The extruded Mg-6Li-0.3Zn-0.6Y alloy possesses an ultimate strength of 225 MPa with an elongation of 18% while the strength and elongation of Mg-6Li-1.2Zn-1.2Y alloy are 206 MPa and 28%, respectively. The X-phase in Mg-6Li-0.3Zn- 0.6Y is beneficial to the improvement of strength, but will lead to the decrease of ductility.

Słowa kluczowe

EN

alloy Mg-Li-Zn-Y; microstructure; mechanical properties; extruded

PL

stop Mg-Li-Zn-Y; mikrostruktura; właściwości mechaniczne; wytłaczanie

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2018
• Tom: Vol. 18, iss. 1
• Strony: 181--185
• Opis fizyczny: Bibliogr. 9 poz., rys., tab., wykr.

Twórcy

autor

Su J.

• Chongqing University, College of Materials Science and Engineering, Chongqing, China

autor

Yang Y.

• Chongqing University, College of Materials Science and Engineering, Chongqing, China
• National Engineering Research Center for Magnesium Alloys, Chongqing, China

autor

Fu X.

• Chongqing University, College of Materials Science and Engineering, Chongqing, China

autor

Ma Q.

• Chongqing University, College of Materials Science and Engineering, Chongqing, China

autor

Ren F.

• Chongqing University, College of Materials Science and Engineering, Chongqing, China

autor

Peng X.

• Chongqing University, College of Materials Science and Engineering, Chongqing, China
• National Engineering Research Center for Magnesium Alloys, Chongqing, China

Bibliografia

• [1] Cheng, Z.Y. & Li, Z.Q. (2011). Hot deformation behavior of an extruded Mg–Li–Zn–RE alloy. Materials Science and Engineering A. 528, 961-966.
• [2] Braszczyńska-Malik, K.N. (2014). Some mechanical properties of experimental Mg-Al-Re-Mn magnesium alloys. Archives of Foundry Engineering, 14, 13-16.
• [3] Gasior, W., Moser, Z. & Zakulski, W. (1996). Thermodynamic studies and the phase diagram of the Li-Mg system. Metallurgical and Materials Transactions A. 27(9), 2419.
• [4] Mahata, A. & Sikdar, K. (2016). Molecular dynamics simulation of nanometer scale mechanical properties of hexagonal Mg-Li alloy. Journal of Magnesium and Alloys. 4, 36-43.
• [5] Chang, T.C. & Wang, J.Y. (2009). Mechanical properties and microstructures of various Mg–Li alloys. Materials Letters. 60, 3272-3276.
• [6] Feng, S. & Liu, W.C. (2017). Effect of extrusion ratio on microstructure and mechanical properties of Mg–8Li–3Al–2Zn–0.5Y alloy with duplex structure. Materials Science & Engineering A. 692, 9-16.
• [7] Zhang, J.Y. & Xu, M. (2009). Effect of Gd addition on microstructure and corrosion behaviors of Mg–Zn–Y alloy. Journal of Magnesium and Alloys. 4, 319-325.
• [8] Dong, H.W. & Wang, L.D. (2011). Preparation and haracterization of Mg-6Li and Mg-6Li-1Y alloys. Journal of Rare Earths. 29, 645-649.
• [9] Luo, S.Q. & Tang, A.T. (2011). Effect of mole ratio of Y to Zn on phase constituent of Mg-Zn-Zr-Y alloys. Transactions of Nonferrous Metals Society of China. 21, 795-800.

Uwagi

PL

Opracowanie rekordu w ramach umowy 509/P-DUN/2018 ze środków MNiSW przeznaczonych na działalność upowszechniającą naukę (2018)