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Coupled Influence of Temperature and Strain Rate on Tensile Deformation Characteristics of Hot-Extruded AZ31 Magnesium Alloy

Ying Yan , Wan-Peng Deng , Zhan-Feng Gao , Jing Zhu , Zhong-Jun Wang , Xiao-Wu Li

金属学报(英文版) doi:10.1007/s40195-016-0373-6

To explore the coupled effect of temperature T and strain rate ε˙ε˙ on the deformation features of AZ31 Mg alloy, mechanical behaviors and microstructural evolutions as well as surface deformation and damage features were systematically examined under uniaxial tension at T spanning...

关键词: AZ31 , Mg , alloy , Uniaxial , tension , Temperature , Strain , rate , Deformation , Damage , Twinning

Effects of Strain Rate and Deformation Temperature on Microstructures and Hardness in Plastically Deformed Pure Aluminum

F. Huang N.R. Tao K. Lu

材料科学技术(英文)

The microstructures and hardness of pure Al samples subjected to plastic deformation with different temperatures and strain rates were investigated. The results showed that the strain-induced grain refinement is significantly benefited by increasing strain rate and reducing deformation temperature. ...

关键词: Dynamic plastic deformation , Microstructure , Hardness , Strain rate , Temperature

EXPERIMENTAL RESEARCH AND NUMERICAL SIMULATION OF MOLD TEMPERATURE FIELD IN CONTINUOUS CASTING OF STEEL

X.S. Zheng*

金属学报(英文版)

Mold is the heart of the continuous casting machine. Heat transfer and solidification in a water- cooled mold are the most important factors during the continuous casting of steel. For studying the temperature distribution of a mold wall, a simulated apparatus of mold was designed and experiments we...

关键词: continuous casting mold , casting , mold , Temperature , fie

Effects of Strain Rate and Deformation Temperature on Microstructures and Hardness in Plastically Deformed Pure Aluminum

F. Huang N.R. Tao K. Lu

材料科学技术(英文)

The microstructures and hardness of pure Al samples subjected to plastic deformation with different temperatures and strain rates were investigated. The results showed that the strain-induced grain refinement is significantly benefited by increasing strain rate and reducing deformation temperature. ...

关键词: Dynamic plastic deformation , Microstructure , Hardness , Strain rate , Temperature

Sliding Friction of Al-Cu-Fe-B Quasicrystals

Xiying ZHOU , Peiyao LI , Junming LUO , Shiqiang QIAN , Jianhua TONG

材料科学技术(英文)

Dry sliding friction between the Al¬59Cu¬25.5Fe¬12.5B¬3 quasicrystals (QCs)/coating of the diamond-like carbon (DLC) was carried out by self-made tribometer under different conditions. The influences of four parameters (temperature, sliding velocity, applied load, atmosphere) on friction and wear of...

关键词: Quasicrystal , null , null

高温环境下硅酸铝纤维的隔热性能

王超 , 刘婷婷 , 蒋立异 , 廖文和

宇航材料工艺 doi:10.3969/j.issn.1007-2330.2014.06.014

硅酸铝纤维供应商往往只提供客户硅酸铝纤维在某一温度的热导率,难以指导隔热结构的设计.本文针对市场上常用的硅酸铝纤维板,设计了隔热性能测试装置,实验获得硅酸铝纤维温度随时间的变化曲线,并进行了有限元仿真分析.研究表明,硅酸铝纤维隔热效果稳定且具有一定的抗热辐射能力.有限元分析结果与实验数据基本一致,说...

关键词: 硅酸铝纤维 , 隔热性能 , 温度 , ANSYS , 边界条件

炭化温度对CO2活化PAN基活性炭纤维微结构的影响

徐斌 , 吴锋 , 曹高萍 , 杨裕生

新型炭材料 doi:10.3969/j.issn.1007-8827.2006.01.003

将PAN预氧化纤维在400℃~900℃炭化,经CO2活化得到一系列活性炭纤维,表征了其比表面、孔容和孔径分布等微结构参数,研究了炭化温度对CO2活化PAN基活性炭纤维微结构的影响.结果表明,炭化温度对活性炭纤维的比表面和孔结构有显著影响,适中的炭化温度(600℃)有利于得到高比表面积、大的孔容和孔径...

关键词: 活性炭纤维 , 炭化 , 温度 , 微结构

YBCO在热冲击条件下的失超特性研究

魏斌 , 丘明 , 张宏杰 , 诸嘉慧 , 陈盼盼 , 杨艳芳

低温物理学报

在实际的超导电力装置运行过程中,超导带材可能由于电力系统中诸如系统短路故障等各种动态过程,承受短路大电流、不平衡电流的冲击,以及由此而产生的电磁、机械应力、热量的作用而失超,因此,研究热冲击对超导材料性能的影响对超导电力装置失超保护非常重要.本文以第二代高温超导(YBCO)带材为样品,模拟实际超导电...

关键词: YBCO , 温度 , 恢复特性 , 失超

环境温度对碳纤维/聚醚醚酮复合材料拉伸性能及疲劳寿命的影响

牛一凡 , 杨赢 , 姚佳伟

宇航材料工艺 doi:10.3969/j.issn.1007-2330.2016.02.014

通过拉伸实验获得碳纤维增强聚醚醚酮复合材料(CF/PEEK)拉伸性能随温度的变化关系,并利用扫描电子显微镜观察断口形貌,研究分析了材料高温损伤机理.结果表明,随着环境温度的升高,碳纤维/PEEK的弹性模量与拉伸强度显著降低,在温度达到220℃时,分别下降89.20%和71.18%;断裂伸长率持续上升...

关键词: 聚醚醚酮 , 复合材料 , 温度 , 拉伸性能 , 疲劳寿命