Hot Deformation Behavior and Processing Maps of As-Homogenized Mg-Gd-Y-Zn-Mn Alloy. Issue 6 (June 2018)

• Record Type: Journal Article
• Authors: Jingfeng, Wang; Feizhou, Xie; Shijie, Liu; Song, Huang; Fusheng, Pan
• Is Part Of: Xi you jin shu cai liao yu gong cheng. Volume 47:Issue 6(2018)
• Page Start: 1700
• Page End: 1707
• Publication Date: 2018-06
• Subjects: Mg-Gd-Y-Zn-Mn alloy -- hot deformation -- processing map -- optimum processing parameter -- microstructure; Nonferrous metals -- Periodicals; 669.05
• DOI: 10.1016/S1875-5372(18)30153-X
• Languages: English
• ISSNs: 1875-5372

Abstract

Abstract: The hot deformation behavior and processing maps of as-homogenized Mg-Gd-Y-Zn-Mn alloy were investigated by hot compression tests performed at 350∼500 °C and strain rates ranging from 0.001 s −1 to 1 s −1 . The constitutive equation was established using hyperbolic law, and the activation energy of the alloy was calculated to be about 260.94 kJ/mol. Based on the dynamic material model, processing maps of as-homogenized Mg-Gd-Y-Zn-Mn alloy deformed at strain values of 0.6, 1.2 were drawn to study the hot workability of the alloy. The processing map developed at a strain of 1.2 shows two safety domains: one occurring at 460~500 °C and strain rates ranging from 0.001 s −1 to 1 s −1 ; the other occurring at 350~500 °C, and strain rate ranging from 0.001 s −1 to 0.005 s −1 . The corresponding microstructure evolution, with particular emphasis on the deformation mechanism of long-period stacking ordered phase (LPSO) in this alloy, was also discussed.