搜索结果: 1-15 共查到“材料科学 Al-Zn-In”相关记录47条 . 查询时间(0.09 秒)
本文将Al-Zn-Mg-Cu合金进行RRA三级时效强化，通过电子衍射和高分辨电子显微术研究了其晶内析出相'相。结合能谱面分布分析和HRTEM像TrueImage重构，提出了'相的一个Mg-Zn-Cu三元结构模型。
新型Al-Zn-Mg-Cu合金双级时效制度研究
Al-Zn-Mg-Cu合金 双级时效 显微组织 性能 沉淀相
2011/8/31
采用硬度法测定了一种新型AlZnMgCu合金挤压带板的GP区临界形核温度TV（GP区在此温度下形核不依靠空位浓度）和TC（GP区在此温度以上不能形核）。他们的温度区间分别为130~140℃和170~180℃。依据实验结果确定了合金的一级时效温度为120℃，二级时效温度为165℃。合金在120℃/4h+165℃/8h制度下热处理后，L向的抗拉强度、屈服强度、伸长率、断裂韧度和电导率分别为617...
采用溶胶--凝胶法合成了S2O82-/Al--Zn--Ce--O固体酸催化剂, 借助IR、XRD、TG/DSC和SEM对其结构和性能等进行了表征与分析, 研究了Ce的加入对催化合成乙酸正丁酯的催化活性和重复使用稳定性的影响。结果表明, 与S2O82-/Al--Zn--O固体酸相比, S2O82-/Al--Zn--Ce--O固体酸表现出更好的重复使用稳定性, 其重复使用5次后, 酯化率仍保持在94%...
采用热力模拟试验方法进行热压缩变形试验,研究了一种新型Al-Zn-Mg-Cu合金在变形温度为300~450℃,应变速率为0.001~1s-1,压缩变形程度为50%条件下的流变应力行为。结果表明,变形温度和应变速率对合金流变应力的大小影响显著,流变应力随变形温度的升高而降低,随应变速率的提高而增大。采用统计回归方法建立了该合金的热压缩变形流变应力本构方程,其热变形激活能Q=169.92kJ/mol。
研究了块体纳米晶Al--10Zn--2.8Mg--1.8Cu合金热处理前后的微区力学性能和变形机制, 结果表明: 块体纳米晶Al--10Zn--2.8Mg--1.8Cu合金经T6处理后杨氏模量没有明显的变化, 硬度明显提高；在SPS试样中可观察到明显的室温蠕变和剪切带, 随着应变速率的增加, 室温蠕变越来越明显, 但是剪切带越来越不明显; 而在T6态试样中很难观察到室温蠕变和剪切带。T6处理改变了...
采用粉末热挤压法制备了一种Al-Zn-Mg-Cu超高强铝合金,研究了粉末粒度和挤压比对合金组织和力学性能的影响.结果表明,400℃挤压时,粉末中位径D50=28.38μm和挤压比λ=25可使挤压合金获得最好的力学性能,挤压合金经过460℃/2.5h水淬+120℃/24h空冷(T6)处理后的抗拉强度、屈服强度和伸长率分别为731MPa,670MPa和6.2%;晶粒细化是挤压合金力学性能随粉末粒度减小...
Microstructures of Mg-Al-Zn and Al-Si-Cu cast alloys
Microstructures Mg-Al-Zn Al-Si-Cu cast alloys
2010/1/11
Recent years’ dynamic development, being present in the automobile industry, is mostly based on innovative constructional solutions as well modern materials, which directly influence mass, performance...
Selection of heat treatment condition of the Mg-Al-Zn alloys
Heat treatment Magnesium alloys Mechanical properties
2009/12/14
Purpose: Main aim of this paper are results of the optimization of heat treatment conditions, which are temperature and heating time during solution heat treatment or ageing as well the cooling rate a...
Structure and properties of alloys of the Mg-Al-Zn system
Mechanical properties Magnesium alloys Tensile test at elevated temperatures
2009/12/14
Purpose: In the following paper there have been the structure and complex of mechanical properties of magnesium alloys presented which requires very often knowledge of elastic-plastic properties at el...
采用光学显微镜(OM)、差热分析(DTA)、扫描电镜(SEM)、透射电镜(TEM)和X射线衍射(XRD)等分析技术研究了在Al-Zn-Mg-Cu-Zr合金中添加微量稀土元素Er和Y对其均匀化行为的影响。研究结果表明:在Al-Zn-Mg-Cu-Zr合金中复合添加微量Er,Y(质量分数<0.4%)使合金的共晶化合物溶解温度升高,其均匀化温度相应提高。合金经二级均匀化处理后仍残留较多的S(Al2CuMg...
The influence of the heat treatment on the microstructure and properties of Mg-Al-Zn based alloys
Heat Treatment Metallography Magnesium alloys
2009/12/3
Purpose: In the following paper there have been the structure and properties of the MCMgAl12Zn1, MCMgAl9Zn1, MCMgAl6Zn1, MCMgAl3Zn1 magnesium cast alloy as-cast state and after a heat treatment presen...
Characteristic of Mg-Al-Zn alloys after laser treatment
Laser alloying Magnesium alloy High Power Diode Laser (HPDL)
2009/12/2
Purpose: The structure and the properties of casting magnesium alloy EN-MCMgAl3Zn1, EN-MCMgAl6Zn1,
EN-MCMgAl9Zn1 and EN-MCMgAl12Zn1 after laser surface treatment are presented in this paper. The aim ...
Microstructural characterization and mechanical properties of Mg-xSn-Al-Zn alloys
Mechanical properties Precipitation hardening TAZ
2009/12/2
Purpose: In this study, the microstructure and mechanical properties of as-cast Mg-xSn-Al-Zn alloys were
investigated.
Design/methodology/approach: Ingot was fabricated by a squeeze cast. The alloys...
铸造Mg-Al-Zn合金的成分、相组成与凝固路径的关系
Mg-Al-Zn合金 相平衡热力学 显微组织
2009/11/30
采用SEM, EDS和XRD研究了几种Mg-Al-Zn合金的成分、相组成与凝固路径的关系. 结果表明, Mg-Al-Zn合金的相组成与Zn/Al质量比有关；随着Zn/Al比值的增加, 第二相γ-Mg17Al12的数量减少, 逐渐被Φ-Mg21(Zn, Al)17 取代, 直至完全消失. 通过搜集合金中可能存在的各相的热力学模型, 运用Pandat热力学计算软件平台, 计算并比较了平衡和非平衡(Sc...