Open AccessEvolution of Microstructure and Properties of ZYK530 Magnesium Alloy during Extrusion-Forging compound Forming
Author(s) -
Cao Fenghong,
Chang Chen,
Yaohui Xu
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/711/1/012001
Subject(s) - materials science , extrusion , forging , ultimate tensile strength , microstructure , alloy , metallurgy , magnesium alloy , magnesium , brittleness , y alloy , composite material , 6111 aluminium alloy
The evolution of microsturcture and mechanical properties of ZYK530 Magnesium alloy during extrusion and die forging compound forming process were studied and analyzed. The results show that the as-cast ZYK530 alloy mainly consists of a-Mg matrix and I-Mg 3 Zn 6 Y and a small amount of W-Mg 3 Y 2 Zn 3 and Mg 2 Zn 3 phases. During extrusion to die forging forming, the grain size of as-cast ZYK530 Magnesium alloy is refined and uniform under the action of three-dimensional compressive stress and high temperature deformation. The I-Mg 3 Zn 6 Y phase of ZYK530 magnesium alloy decrease relatively, while the distribution of W-Mg 3 Y 2 Zn 3 is more obvious, a small amount of Z-Mg 12 ZnY and Mg-Zn phases and undetermined phases can be observed in the matrix. Tensile test results show that the tensile strength, yield strength and elongation of extruded preformed specimens are increase by 32.6%, 18% and 18% respectively compared with as-cast specimens. The mechanical properties of final forged specimens are improved by 9%, 38.6% and 23% respectively compared with those of extruded preformed specimens. The fracture mechanism changes form as-cast cleavage fracture to mixed fracture mechanism of toughness and brittleness.