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Effect of Laser Power on the Cladding Temperature Field and the Heat Affected Zone

LUO Fang , YAO Jianhua , HU Xiaxia , CHAI Guozhong

钢铁研究学报(英文版)

Abstract: In this paper, H13 powder is cladded on P20 base during continuous CO2 laser, the influence of processing technologies such as the laser power is analyzed. The 3-D model of synchronous powder feeding is established under Gauss heat source, the simulation results are compared with the exper...

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Laser Direct Metal Deposition Technology and Microstructure and Composition Segregation of Inconel 718 Superalloy

ZHANG Qunli , YAO Jianhua , Jyoti Mazumder

钢铁研究学报(英文版)

Multilayer of laser direct metal deposition (DMD) was prepared by depositing a gas atomized prealloyed powder with a composition close to Inconel 718 alloy on Inconel 718 high temperature alloy substrate. The effects of the DMD parameters on the buildup rate and the structure of the deposited laye...

关键词: laser DMD; Inconel 718 alloy; composition segregation; microstructure; hardness

Pulsed laser deposition of aluminate YAlO3 and LaAlO3 thin films for alternative gate dielectric applications

Applied Physics a-Materials Science & Processing

Amorphous aluminate YAlO3 (YAO) thin films on n-type silicon wafers as gate dielectric layers of metal - oxide semiconductor devices are prepared by pulsed laser deposition. As a comparison, amorphous aluminate LaAlO3 (LAO) thin films are also prepared. The structural ...

关键词: hafnium oxide;si;stability;silicon;transition;dioxide;devices;hfo2

NiO/FeCo磁性多层膜的高频磁性

李玉伟 , 陈继红 , 唐东明 , 张豹山 , 鹿牧 , 陆怀先

功能材料与器件学报 doi:10.3969/j.issn.1007-4252.2010.02.011

制备了一系列具有铁磁/反铁磁交换偏置作用的[NiO/Fe65Co35]10多层膜,使用振动样品磁强计(VSM)测量了样品的静磁参数,利用微带线法测量了样品4GHz-10GHz的磁谱,首次制备并测得了自然共振频率(fr)在6GHz以上,最高到f=9.6GHz的薄膜样品.结果表明交换偏置场(Hex)、各...

关键词: 铁磁 , 反铁磁 , 交换偏置场 , 各向异性场 , 交换耦合能密度 , 自然共振频率

DL-EPR法评价2205双相不锈钢晶间腐蚀敏感性

徐菊良 , 邓博 , 孙涛 , 李劲 , 蒋益明

金属学报 doi:10.3724/SP.J.1037.2009.00598

利用Thermo-Calc软件并结合金相显微镜,定性研究了2205双相不锈钢在800℃下敏化不同时间后的微观组织演变过程.通过研究扫描速率、介质成分、介质温度和试样表面状态优化了双环电化学动电位再活化法(DL-EPR),并用该优化方法研究了2205双相不锈钢晶间腐蚀敏感性.结果表明:DL-EPR法能...

关键词: 2205双相不锈钢 , DL-EPR , 晶间腐蚀敏感性 , σ相

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