搜索结果: 106-120 共查到“工学 Mg”相关记录410条 . 查询时间(0.11 秒)
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...
Structure and mechanical properties of Mg-Si alloys at elevated temperatures
Mechanical properties Magnesium alloys Tensile test at elevated temperatures
2009/12/14
Purpose: of this paper is to extend a complex evaluation of magnesium alloys which requires very often knowledge of structure and mechanical properties at elevated temperatures. These properties are c...
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...
Purpose: The aim of the present work is to study the influence of temperature on tensile properties of the magnesium
alloy AJ50, and to discuss possible hardening and softening mechanisms and therma...
The influence of Nd and Ho addition on the microstructure of Mg-7Al alloy
Mg-Al-RE alloys Casting Heat treatment Microstructure
2009/12/2
Purpose: of this paper was to examine effect of Nd and Ho on the microstructure of as-cast and solid-treated
Mg-7Al alloy, and to study the response to ageing by hardness changes measurements of in...
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...
采用Gleeble−1500热压缩模拟试验机进行压缩实验，研究ZK60(0.9Y+0.3Nd)镁合金在变形温度623~773 K、应变速率0.001~1 s−1的范围内的变形行为，计算应力指数和变形激活能，并采用Zener-Hollomon参数法构建合金高温塑性变形的本构关系。结果表明：在实验变形条件下，合金的真应力—真应变曲线为动态再结晶型；在实验温度范围内，应力指数随着...
新型含钪Al-Mg-Cu合金的抗应力腐蚀开裂特性
含钪铝合金 应力腐蚀开裂 强度因子
2010/4/2
对3.5%NaCl溶液中新型含钪Al-Mg-Cu合金的应力腐蚀开裂宏观性能进行测试，并对裂纹尖端的成分与微观形貌进行分析。根据线弹性断裂力学理论，预制疲劳裂纹试样裂纹尖端处于平面应变状态，得到裂纹匀速扩展时的扩展速率、裂纹尖端应力强度因子以及应力腐蚀开裂强度因子的门槛值。扫描电镜及EDS分析表明：应力腐蚀开裂主要是沿晶扩展，预制裂纹与腐蚀介质中的溶解氧生成Al2O3，产生楔入力促使裂纹扩展；裂纹尖...
使用自主开发的一维输运／燃耗／可视化计算程序系统VisualBUS1．0和HENDL1．1／MG数据库，对^233U，^235U和^239Pu的热溶液临界球基准实验和^237Np，^241Am和^244Cm的金属快裂变临界球问题进行校核。和国际上广泛使用的各种程序和数据库的模拟计算结果以及相关实验结果进行综合对比和分析，初步验证了HENDL1．1／MG中裂变核素核数据的可靠性和应用性，同时也进一步...
7075铝合金氢脆敏感性与Mg-H相互作用
7075铝合金 晶界偏析 氢脆 Mg-H相互作用
2012/5/29
利用阴极渗氢法、定氢仪、电子拉伸实验机、能谱（EDS）和扫描电镜（SEM）等方法研究了“双峰”时效下7075铝合金的晶界偏析行为、氢脆（HE）敏感性以及Mg-H相互作用。结果表明：充氢前后合金的强度等性能具有时效“双峰”特征；第二峰处合金强度的下降量明显比第一峰的小，且第二峰时合金具有高强、低HE敏感性等优异性能；在阴极渗氢过程中Mg与H之间存在着相互作用。最后，对Mg-H相互作用机制进行了探讨。
结晶Mg（OH）2的表面改性及其对EVA性能的影响
氢氧化镁 阻燃 表面改性 EVA
2009/11/19
用硅烷类表面改性剂对结晶氢氧化镁进行了表面改性，并对EVA进行了复合添加研究，获得以复合高分子材料优良机械性能和阻燃性能为判据的最佳添加条件为：改性时间0.5h,改性温度110℃,改性剂用量2%. 针对氢氧化镁添加量等因素对材料物理性能带来的影响机理提出了自己的见解.