Achieving High-Strength and Toughness in a Mg-Gd-Y Alloy Using Multidirectional Impact Forging期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

Achieving High-Strength and Toughness in a Mg-Gd-Y Alloy Using Multidirectional Impact Forging

Authors:	Songhe Lu Di Wu Ming Yan Rongshi Chen

Affiliation:	1.Academy for Advanced Interdisciplinary Studies, Southern University of Science and Technology, Shenzhen 518055, China; (S.L.); (M.Y.);2.Shi-Changxu Innovation Center for Advanced Materials, Institute of Metal Research, Chinese Academy of Sciences, 72 Wenhua Road, Shenyang 110016, China;

Abstract:	High strength and toughness are achieved in the Mg-4.96Gd-2.44Y-0.43Zr alloy by multidirectional impact forging (MDIF). The forged sample has a fine-grained microstructure with an average grain size of ~5.7 µm and a weak non-basal texture, and it was characterized by an optical microscope (OM), scanning electron microscope (SEM), and electron back-scattering diffraction (EBSD). Tensile results exhibit the tensile yield strength (TYS) and static toughness (ST) of as-homogenized alloy dramatically increased after forging and aging, i.e., the TYS increased from $135_{- 5}^{+ 4}$ MPa to $337_{- 2}^{+ 2}$ MPa, and the ST enhanced from 22. $0_{- 0.5}^{+ 0.3}$ MJ/m³ to 50. $4_{- 5.4}^{+ 5.3}$ MJ/m³. Specifically, the forged Mg-Gd-Y-Zr alloy owns higher TYS than that of commercial rolled WE54 (Mg-5.25Y-3.5Nd-0.5Zr) and WE43 (Mg-4.0Y-3.0Nd-0.5Zr) alloys.

Keywords:	grain refinement, high strength and toughness, {10– 12} twin, Mg-Gd-Y alloy, multidirectional impact forging