Compressive Behavior at Ambient Temperature of ZK60-xDy Magnesium Alloys

Abstract:

Effects of the compressive rate, specimen dimension, specimen orientation and microstructure on the compressive property at ambient temperature of extruded ZK60-xDy alloy rods were investigated. The results show that the specimen dimension, specimen orientation and microstructure except the compressive rate play a significant role on the compressive property. The compressive strength σ_bc increased significantly by the improving amplitude of 65~110 MPa with increasing the height/diameter ratio h/φ of the cylindrical compressive specimen from 0.5 to 1, however it was not enhanced further as h/φ increased to 2. With increasing the value of h/φ, the yield stage on the compressive curve was strengthened gradually, and meanwhile the compressive macro-fracture changed from the inverted "V" type to pure shear fracture with an angle of 45°. Compared with the specimen whose axial direction was parallel to the transverse direction, σ_bc was enhanced by the improving amplitude of 60~120 MPa for the specimen whose axial direction was parallel to the extrusion direction. When small amount of Dy (0.31%) was added into ZK60 alloy, σ_bc was increased from 500 MPa to 540 MPa. However, it slightly decreased to 515 MPa again when the Dy content increased to 4.32%.

• Periodical: Materials Science Forum (Volume 849)
• Pages: 128-133
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.849.128
• Online since: March 2016
• Authors: Zheng Hua Huang, Wen Jun Qi*, Jing Xu
• Keywords: Compressive Property, Compressive Rate, Magnesium Alloy, Microstructure, Specimen Orientation

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