采用CALPHAD(CALculation of PHAse Diagrams)方法重新对Mg-Al-Gd三元系进行评估,获得一套自洽的热力学参数。用Mg_(x)(TM,Mg)_(6)(RE,Mg)_(8)热力学模型(TM=过渡金属,RE=稀土金属)描述长周期堆积有序相14H和18R。计算代表性的等温截面...采用CALPHAD(CALculation of PHAse Diagrams)方法重新对Mg-Al-Gd三元系进行评估,获得一套自洽的热力学参数。用Mg_(x)(TM,Mg)_(6)(RE,Mg)_(8)热力学模型(TM=过渡金属,RE=稀土金属)描述长周期堆积有序相14H和18R。计算代表性的等温截面、垂直截面、液相线投影图和相关的零变量反应,与实验数据进行比较,表明所得热力学参数的可靠性。绘制了整个三元体系的反应图,并对几种Mg-Al-Gd合金的Scheil凝固路径和相分数进行计算和分析,清楚地描述了凝固过程中各相的形成以及γ和LPSO相的相分数随Gd成分的变化,这些是影响Mg-Al-Gd合金的显微硬度、极限抗拉强度和屈服强度的重要因素。展开更多
综述了国内外几种制备Mg_(97)ZnY_2合金的工艺特点和研究现状,分析了该合金中几种不同长周期结构(Long period stacking ordered structure,简称LPSO)的形成机制及堆跺方式,提出了Mg_(97)ZnY_2合金当前研究的主要问题,并展望了Mg_(97)Zn...综述了国内外几种制备Mg_(97)ZnY_2合金的工艺特点和研究现状,分析了该合金中几种不同长周期结构(Long period stacking ordered structure,简称LPSO)的形成机制及堆跺方式,提出了Mg_(97)ZnY_2合金当前研究的主要问题,并展望了Mg_(97)ZnY_2合金应用于现实生产的前景。展开更多
基金supported by Chongqing Talent Plan:Leading Talents in Innovation and Entrepreneurship,China(No.CQYC201903051)University Innovation Research Group of Chongqing,China(No.CXQT20023)+4 种基金Qingnian Project of Science and Technology Research Program of Chongqing Municipal Education Commission,China(No.KJQN202001106)China Postdoctoral Science Foundation(No.2021M700556)Natural Science Foundation of Chongqing,China(No.cstc2021jcyj-bsh X0114)Natural Science Foundation of China(Nos.U20A20234,51874062)Chongqing Foundation and Advanced Research Project,China(No.cstc2019jcyj-zdxm X0010)。
基金the financial supports from the National Natural Science Foundation of China(Nos.52175321,52101138)Start-up Fund from Huazhong University of Science and Technology,China(Nos.3004110125,3004110142)+4 种基金State Key Lab of Advanced Metals and Materials,China(No.2020-Z01)State Key Laboratory for Mechanical Behavior of Materials,China(No.20202205)State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body,China(No.32015001)Guangdong Basic and Applied Basic Research Foundation,China(No.2020A1515110531)Natural Science Foundation of Hubei Province,China(No.2020CFB259)。
基金The financial supports from the National Key Laboratory of Science and Technology on High-strength Structural Materialsthe National Natural Science Foundation of China(No.51771235)。
文摘采用CALPHAD(CALculation of PHAse Diagrams)方法重新对Mg-Al-Gd三元系进行评估,获得一套自洽的热力学参数。用Mg_(x)(TM,Mg)_(6)(RE,Mg)_(8)热力学模型(TM=过渡金属,RE=稀土金属)描述长周期堆积有序相14H和18R。计算代表性的等温截面、垂直截面、液相线投影图和相关的零变量反应,与实验数据进行比较,表明所得热力学参数的可靠性。绘制了整个三元体系的反应图,并对几种Mg-Al-Gd合金的Scheil凝固路径和相分数进行计算和分析,清楚地描述了凝固过程中各相的形成以及γ和LPSO相的相分数随Gd成分的变化,这些是影响Mg-Al-Gd合金的显微硬度、极限抗拉强度和屈服强度的重要因素。
文摘综述了国内外几种制备Mg_(97)ZnY_2合金的工艺特点和研究现状,分析了该合金中几种不同长周期结构(Long period stacking ordered structure,简称LPSO)的形成机制及堆跺方式,提出了Mg_(97)ZnY_2合金当前研究的主要问题,并展望了Mg_(97)ZnY_2合金应用于现实生产的前景。
基金Project(BK20160869)supported by the Natural Science Foundation of Jiangsu Province,ChinaProject(GY12015009)supported by the Nantong Science and Technology Program,China+1 种基金Project(2015B01314)supported by the Fundamental Research Funds for the Central Universities,ChinaProject(51501039)supported by the National Natural Science Foundation of China