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| 1 | Effect of long-period stacking ordered phase on microstructure,mechanical property and corrosion resistance of Mg alloys: A review显示文摘Magnesium alloys containing long period stacking ordered(LPSO) phase have been received a great deal of attention in the last decade owing to their excellent comprehensive properties of mechanical strength and corrosion resistance. In this paper, some fundamental aspects of LPSO containing Mg alloys have been reviewed, including:(1) microstructural characterization, formation conditions and the associated phase transformation of LPSO phases in Mg alloys;(2) deformation mechanism of LPSO phases and their in fl uence on the deformation mechanism of the Mg matrix;(3) effect of LPSO structure on the mechanical performance such as tensile strength, creep resistance, fracture toughness and fatigue strength;(4) corrosion behavior of LPSO containing Mg alloys and their possible applications as the biomaterials.Moreover, some remaining unsolved issues of the LPSO containing Mg alloys and the future target about how to further improve their service properties have been also described. | Daokui Xu En-hou Han Yongbo Xu | 2016 | Progress in Natural Science:Materials International2016，26，2： | 11 |
| 2 | 协同K-M和E-M准则的TC18钛合金高温变形加工硬化行为显示文摘基于位错演化规律量化研究了高温变形过程中的加工硬化行为。通过分析Kocks-Mecking和Estrin-Mecking模型在高温变形加工硬化阶段的适用性,发现两种演化模型在动态软化临界条件处发生转换。通过不同变形条件下TC18钛合金热模拟压缩实验,分析不同参数条件下3个硬化阶段的变化规律。整合Kocks-Mecking和Estrin-Mecking模型,研究高温变形加工硬化阶段硬化率对流变应力的响应机制。根据位错增殖系数特点,分析低应力区应力稳态波动的原因及随变形条件不同而出现的变化规律。并由模型中的位错湮灭系数来量化硬化率变化对变形参数的依赖。最后根据高温变形硬化软化的并发性,结合两种演化模型研究高温变形加工硬化行为的阶段性特点。 | 高志刚 郭鸿镇 苗小浦 姚泽坤 | 2015 | 材料热处理学报2015，36，S2： | 5 |
| 3 | Hot compressive deformation behaviors of Mg–10Gd–3Y–0.5Zr alloy显示文摘In this paper, the hot compressive deformation characteristics of a Mg–10Gd–3Y–0.5Zr(GW103K) alloy have been investigated by isothermal compression test at the temperature range of 350–450°C and strain rate range of 0.0001–0.1s^(-1). True stress–strain relationships at various strain rates showed the typical strain hardening and softening stage which is indicative of dynamic recrystallization during deformation. The results showed that the peak stress was obviously dependent on temperature and strain rate. A constitutive equation to describe the deformation process was established based on the hyperbolic sine function. The stress exponent n and apparent activation energy Q were determined to be 3.018 and 203.947 k J/mol, respectively. Microstructure investigation showed that dislocation slipping was the dominant deformation mechanism during the hot deformation at all conditions. However, at the temperatures lower than 400 °C and strain rates higher than 0.01 s^(-1), twinning was observed to be activated, which indicated another deformation mechanism. Dynamic recrystallization and dynamic precipitation were found to occur simultaneously under such deformation condition. | Tingting Zheng Dejiang Li Xiaoqin Zeng Wenjiang Ding | 2016 | Progress in Natural Science:Materials International2016，26，1： | 2 |
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