共搜索到18973条信息,每页显示10条信息,共1898页。用时:0小时0分0秒500毫秒
can also break into α2 and become α1 at the end. Controlled by undercooling, αprim nucleates and spherically grows within the remaining liquid alloy of thixomolded AZ91D until instability growth. The investigated microstructure was theoretically proved according to the analysis of Mg-Al binary phase diagram. Key words: thixomolded AZ91D alloy; solid particle; solidification behavior 1......
potential of NZK is much lower than that of AZ91D indicated by the open circuit potential measurement. The cyclic polarization curves show that NZK alloy has higher pitting corrosion resistance than AZ91D. Key words: AZ91D Mg alloy; Mg-RE alloy; corrosion behavior; cyclic polarization  ......
Friction stir processing of thixoformed AZ91D magnesium alloy and fabrication of Al-rich surface CHEN Ti-jun(陈体军), ZHU Zhan-ming(朱战民), LI Yuan-dong(李元东), MA Ying(马 颖), HAO Yuan(郝 远) State Key...-mechanically affected zone were investigated during friction stir processing (FSP) of the thixoformed AZ91D alloy. Simultaneously, an Al-rich surface layer was prepared by combination of Al powder......
Trans. Nonferrous Met. Soc. China 24(2014) 1683-1689 Dynamic recrystallization kinetics of as-cast AZ91D alloy Yan XU1, 2, Lian-xi HU1, Yu SUN1 1. School of Materials Science and Engineering, Harbin... and dynamic recrystallization (DRX) behavior of an as-cast AZ91D alloy were investigated systematically by applying the isothermal compression tests in temperature range of 220-380 °C and strain rate......
......
Effects of RE and Sr additions on dendrite growth and phase precipitation in AZ91D magnesium alloy ZHOU Ji-xue(周吉学), WANG Jie(王 杰), WANG Jing(王 晶), YANG Yuan-sheng(杨院生) Institute of Metal... of rare earth (RE), Sr and RE + Sr on the dendrite growth and phase precipitation in AZ91D magnesium alloy were studied, respectively. The results show that the microstructure is refined......
Effects of increase extent of voltage on wear and corrosion resistance of micro-arc oxidation coatings on AZ91D alloy L? Wei-ling(吕维玲)1, CHEN Ti-jun(陈体军)1, MA Ying(马 颖)1, XU Wei-jun(徐卫军)1, 2... oxidation (MAO) coatings on AZ91D magnesium alloy were investigated in silicate electrolyte. The results show that with increasing extent of voltage, both of the thickness and bonding force of MAO coatings......
快速凝固AZ91D镁合金组织的研究 张忠明1,郭学锋1,黄正华1 (1.西安理工大学,材料科学与工程学院,陕西,西安,710048) 摘要:用光学显微镜和透射电镜观察了普通凝固和快速凝固AZ91D合金的组织,用X射线衍射XRD分析了合金的相组成.结果表明,普通凝固AZ91D合金组织由α-Mg基体和β-Mg17Al12相组成,晶粒较粗大,而快速凝固AZ91D合金薄带截面组织由靠近辊面的粗大等轴晶区,中部的柱状晶区和自由表面层的细小等轴晶区三部分组成,三层组织均为过饱和α-Mg固溶体,并观察到较高的位错密度. 关键词:AZ91D镁合金; 快速凝固; 组织; [全文内容正在添加中] ......
content in AZ91D alloy, and the holding time and temperature affected on the quality of slurry. Key words:AZ91D alloy; semi-solid forming; solidification; heterogeneous nucleation; [全文内容正在添加中] ...Preparation of AZ91D Slurries for Semi-Solid Forming Using Al8 ( Mn, Fe) 5 Precipitates Heon Phil Ha1,Jeong Man Doh1,Ji Young Byun1,Soon Il Kwon1 (1.Metal Processing Research Center,Division......
Trans. Nonferrous Met. Soc. China 22(2012) 2906-2912 Microstructure evolution of hot pressed AZ91D alloy chips reheated to semi-solid state XU Hong-yu, JI Ze-sheng, HU Mao-liang, WANG Zhen-yu School of Material Science and Engineering, Harbin University of Science and Technology, Harbin 150040, China Received 9 August 2012; accepted 15 October 2012 Abstract: AZ91D magnesium alloy chips, which......