Effect of heat treatment on microstructure and mechanical properties of Mg-4Y-1.6Nd-1Sm-0.5Zr alloy. (7th March 2018)

• Record Type: Journal Article
• Authors: Jia, Guilong; Guo, Erjun; Feng, Yicheng; Wang, Liping; Wang, Changliang
• Is Part Of: Materials research express. Volume 5:Number 3(2018)
• Publication Date: 2018-03-07
• Subjects: Mg-4Y-1.6Nd-1Sm-0.5Zr alloy -- heat treatment -- microstructure -- mechanical properties -- fracture mode; Materials science -- Research -- Periodicals; Materials science -- Periodicals; 620.11
• DOI: 10.1088/2053-1591/aab074
• Languages: English
• ISSNs: 2053-1591

Abstract

Abstract: Microstructure and mechanical properties of Mg-4Y-1.6Nd-1Sm-0.5Zr alloy during heat treatments were investigated, while the room-temperature tensile fractographs were observed and analyzed. The results show that the eutectic phases almost dissolve into the matrix after being solutionized at 525 °C for 8 h. The ultimate tensile strength, yield strength and elongation reach 300 MPa, 219 MPa, 6.5% respectively after being under-aged at 200 °C for 16 h. The ultimate tensile strength and yield strength of the alloy decrease gradually, while the elongation increases gradually with increasing the test temperatures. The room-temperature tensile fracture modes of the as-cast alloy, solutionized alloy, aged alloy are mixed fracture of transgranular and intergranular, transgranular cleavage fracture, transgranular fracture, respectively.