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J. Cent. South Univ. (2017) 24: 692-698 DOI: 10.1007/s11771-017-3470-4 Temporal-spatial cross-correlation analysis of non-stationary near-surface wind speed time series ZENG Ming(曾明), LI Jing-hai(李静... wind speed time series plays a crucial role in wind field reconstruction as well as in wind pattern recognition. Firstly, the near-surface wind speed time series recorded at different locations......
Property measurements on spray formed Si-Al alloys WEI Yan-guang(魏衍广), XIONG Bai-qing(熊柏青), ZHANG Yong-an(张永安), LIU Hong-wei(刘红伟), WANG Feng(王 锋), ZHU Bao-hong(朱宝宏) State Key Laboratory... by spray forming process for electronic packaging. Property measurements on spray-formed Si-Al alloys after hot pressing were carried out. The results indicate that the alloys (Si-(30%-40%)Al) have......
电感耦合等离子体原子发射光谱法测定AZ系列镁合金中磷周西林1,田晓溪2,李芬3,闫立东2,刘守琼11. 重庆市计量质量检测研究院铝镁中心2. 辽宁科技大学化学工程学院3. 重庆工业职业技术学院化学工程系摘 要:提出了一种快速而准确测定AZ系列镁合金中磷的方法.以盐酸和过氧化氢溶解样品,选择213.618nm波长的谱线作为分析线,采用基体匹配校准曲线,电感耦合等离子体原子发射光谱法(ICP-AES)测定试液中磷含量.测定100mL试液中120μg磷时,500mg镁,200mg铝,10mg锌,1.0mg锰对测定没有干扰.AZ系列镁合金样品基本不含钼和铜,且钼干扰线的强度很弱和所用仪器对磷与铜谱线的分辨率比较高,因此钼和铜对磷测定的影响可以不考虑.方法的检出限为0.028mg/L.方法用于测定铸造镁合金中......
AZ镁合金用于干电池负极材料的电化学性能研究程毅1,2,潘复生1,2,朱伟31. 重庆大学国家镁合金材料工程技术中心2. 重庆大学材料科学与工程学院3. 重庆大学化学化工学院摘 要:采用失重法,线性电位扫描,扣式电池放电测试等方法,研究AZ21和AZ31镁合金作为镁锰干电池负极材料时的电化学性能以及电解质添加剂Li2CrO4对其电化学性能的影响.结果表明,作为干电池的负极材料,在Mg(ClO4)2作电解质时,AZ21与AZ31相比,其自腐蚀速率大,开路电压稍高,电池容量和正极材料利用率低;添加少量的Li2CrO4能大大降低AZ21和AZ31合金的自放电速率,其缓蚀作用随Li2CrO4浓度的增加而增加,但当超过0.3%(质量分数)后反而降低;Li2CrO4的添加可提高电池的工作电压,电池容量和正极材料利......
DC51D+AZ热镀铝锌薄板弯曲折痕缺陷的形成原因王银军1,刘学伟1,彭琼瑶2,彭雄奇21. 上海梅山钢铁公司技术中心2. 上海交通大学材料科学与工程学院摘 要:DC51D+AZ热镀铝锌薄板弯曲成形时出现了弯曲折痕缺陷,对正常产品和缺陷产品的化学成分,组织和性能进行对比分析以找出缺陷产生的原因.结果表明:较低温度的终轧,卷取工艺导致薄板晶粒细化,硬度增高,屈服伸长率增大,塑性变形的稳定性变差是导致产生弯曲折痕缺陷的主要原因.建议钢板生产厂家生产DC51D+AZ热镀铝锌薄板时应采用较高温度的终轧,卷取工艺和充分的退火.关键词:热镀铝锌薄板;弯曲折痕;缺陷;......
Properties of fluoride film and its effect on electroless nickel deposition on magnesium alloys LIU Xin-kuan(刘新宽)1, LIU Zi-li(刘子利)2, LIU Ping(刘 平)1, XIANG Yang-hui(向阳辉)3, HU Wen-bin(胡文斌)3, DING... stability in electroless nickel (EN) bath was analyzed. The effects of the fluoride film on EN deposition were studied additionally. The results show that the fluoride film on magnesium alloys......
; stamping formability CLC number: TG146.2 Document code: A 1 INTRODUCTION The heat-treatable Al-Mg-Si-Cu (6000 series) aluminium alloys as automotive body sheet materials are being brought... range of compositions from 0.25% to 1.0%[3, 5, 6]. However, Mg is the mainly adding element in 6000 series alloys, and previous work gave more attention to effects of Mg on precipitation behavior......
Research on microstructure and magnetostriction of Fe83Ga17Dyx alloys江丽萍,张光睿,杨建东,郝宏波,吴双霞,赵增祺Baotou Research Institute of Rare Earths摘 要:The crystal structure,microstructure and the magnetostriction of Fe83Ga17Dyx(x=0,0.2,0.4,0.6) series alloys were studied.The results showed that the influence of the Dy on the crystal structure of the alloy was very......
Research on microstructure and magnetostriction of Fe83Ga17Dyx alloys江丽萍,张光睿,杨建东,郝宏波,吴双霞,赵增祺Baotou Research Institute of Rare Earths摘 要:The crystal structure,microstructure and the magnetostriction of Fe83Ga17Dyx(x=0,0.2,0.4,0.6) series alloys were studied.The results showed that the influence of the Dy on the crystal structure of the alloy was very......
properties of Mg-Ni series hypoeutectic alloys according to the mechanism involving the interaction between the dislocation and solute atoms[6]. As shown in Fig.1, the dimension of the α-Mg dendrites... Effect of eutectic phase on damping and mechanical properties of as-cast Mg-Ni hypoeutectic alloys WAN Di-qing(万迪庆), WANG Jin-cheng(王锦程), WANG Gai-fang(王改芳), LIN Lin(林 琳), FENG Zhi-gang(冯志刚......
