Effect of Extrusion Temperatures on Microstructures and Mechanical Properties of Mg-6Zn-1Mn-4Sn-0.5Y Alloy. Issue 5 (May 2016)

• Record Type: Journal Article
• Authors: Guangshan, Hu; Dingfei, Zhang; Tian, Tang; Luyao, Jiang; Fusheng, Pan
• Is Part Of: Xi you jin shu cai liao yu gong cheng. Volume 45:Issue 5(2016)
• Page Start: 1111
• Page End: 1116
• Publication Date: 2016-05
• Subjects: Mg-6Zn-1Mn-4Sn-0.5Y alloy -- extrusion temperatures -- phase compositions -- mechanical property; Nonferrous metals -- Periodicals; 669.05
• DOI: 10.1016/S1875-5372(16)30103-5
• Languages: English
• ISSNs: 1875-5372

Abstract

Abstract: The microstructural evolution and the mechanical properties of Mg-6Zn-1Mn-4Sn-0.5Y wrought alloy extruded at 360 and 420 °C were investigated by optical microscopy (OM), X-ray diffraction (XRD), scanning electron microscopy (SEM), electron back scattered diffraction (EBSD) and tensile test. The results show that the phase compositions of as-cast and extruded alloys consist of α -Mg, Mn, Mg7 Zn3, Mg2 Sn, and MgSnY phases. As the extrusion temperature increases from 360 °C to 420 °C, dynamic recrystallization completes and grain growth occurs. The yield strength, the ultimate tensile strength and the elongation decrease from 259 MPa, 350 MPa and 18.3% to 239 MPa, 332 MPa and 12.5%, respectively. The theoretical calculations combined with the experimental results reveal that fine grain strengthening and solid solution strengthening play the dominating role in the enhancement of yield strength.