通过显微组织观察、织构分析和拉伸测试等手段研究挤压比对双相Mg-8Li-6Zn-2Gd合金显微组织、织构和力学性能的影响。结果表明:均匀化态Mg-8Li-6Zn-2Gd合金中含有α-Mg、β-Li、Mg Li Zn、I相和W相。经热挤压后,共晶I相被碾碎成细小颗粒...通过显微组织观察、织构分析和拉伸测试等手段研究挤压比对双相Mg-8Li-6Zn-2Gd合金显微组织、织构和力学性能的影响。结果表明:均匀化态Mg-8Li-6Zn-2Gd合金中含有α-Mg、β-Li、Mg Li Zn、I相和W相。经热挤压后,共晶I相被碾碎成细小颗粒状,而W相保持原有块状形状。合金中α-Mg基体和β-Li基体在热挤压过程中均发生了动态再结晶(DRX),且晶粒随着挤压比的增加逐渐细化。经热挤压后,α-Mg基体的基面织构弱化和柱面织构增强是由于非基面滑移的激活;β-Li基体中形成明显的α和γ纤维织构主要与动态回复与动态再结晶相关。热挤压同时提升Mg-8Li-6Zn-2Gd合金的抗拉强度和伸长率,并在挤压比为16:1时获得最佳的综合力学性能。展开更多
基金the National Natural Science Foundation of China (Nos. 52071179, 5227010325)the Natural Science Foundation of Jiangsu Province, China (No. BK20221493)the Fundamental Research Funds for the Central Universities, China (Nos. 30920021160, 30919011405)。
基金support from the National Science Foundation of China (No.51971249)the Natural Science Foundation of Shandong Province,China (No.ZR2020KE012)the Science and Technology Planning Project of Longkou City,China (No.2021KJJH025).
基金supported by the Open Fund of State Key Laboratory of Advanced Forming Technology and Equipment (No. SKL202005)the Major Scientific and Technological Innovation Project of Luoyang,China(No. 2201029A)+1 种基金the National Natural Science Foundation of China (Nos. 51771115, 51775334)the Research Program of SAST-SJTU Joint Research Center of Advanced Spaceflight Technologies,China (No. USCAST2020-14)。
基金financial supports from the Open Project of Key Laboratory of Green Fabrication and Surface Technology of Advanced Metal Materials,Ministry of Education,China (Nos. GFST2021KF04, GFST2021KF09)the Natural Science Research Project of Anhui Educational Committee,China (Nos. KJ2021A0394, KJ2021A0395)Anhui Provincial Natural Science Foundation,China (No. 2208085QE124)。
文摘通过显微组织观察、织构分析和拉伸测试等手段研究挤压比对双相Mg-8Li-6Zn-2Gd合金显微组织、织构和力学性能的影响。结果表明:均匀化态Mg-8Li-6Zn-2Gd合金中含有α-Mg、β-Li、Mg Li Zn、I相和W相。经热挤压后,共晶I相被碾碎成细小颗粒状,而W相保持原有块状形状。合金中α-Mg基体和β-Li基体在热挤压过程中均发生了动态再结晶(DRX),且晶粒随着挤压比的增加逐渐细化。经热挤压后,α-Mg基体的基面织构弱化和柱面织构增强是由于非基面滑移的激活;β-Li基体中形成明显的α和γ纤维织构主要与动态回复与动态再结晶相关。热挤压同时提升Mg-8Li-6Zn-2Gd合金的抗拉强度和伸长率,并在挤压比为16:1时获得最佳的综合力学性能。
基金the National Natural Science Foundation of China(Nos.51822509,51701034)the Scientific and Technological Research Program of Chongqing Municipal Education Commission,China(Nos.KJQN201801137,KJQN201901106)the Basic and Advanced Research Project of CQ CSTC,China(No.cstc2018jcyjAX0035).