中国科学院机构知识库网格系统: 检索

Investigation on Relationship between Defects and Paramaters for Titanium Alloy Fabricated by Selective Laser Melting 期刊论文 OAI收割
RARE METAL MATERIALS AND ENGINEERING, 2021, 卷号: 50, 期号: 8, 页码: 2841-2849
作者: Zhao Chunling; Li Wei; Wang Qiang; Wang Yujia; Zhao Yu

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收藏 | 浏览/下载：33/0 | 提交时间：2021/11/22

selective laser melting defect laser power scanning speed laser energy density

Investigation on Relationship between Defects and Paramaters for Titanium Alloy Fabricated by Selective Laser Melting 期刊论文 OAI收割
RARE METAL MATERIALS AND ENGINEERING, 2021, 卷号: 50, 期号: 8, 页码: 2841-2849
作者: Zhao Chunling; Li Wei; Wang Qiang; Wang Yujia; Zhao Yu

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收藏 | 浏览/下载：37/0 | 提交时间：2021/11/22

selective laser melting defect laser power scanning speed laser energy density

Laser frequency noise measurement using an envelope-ratio method based on a delayed self-heterodyne interferometer 期刊论文 OAI收割
OPTICS COMMUNICATIONS, 2019, 卷号: 435, 页码: 244-250
作者: Zhan, Mingsheng; Wang, Jin; Chen, Xi; Xu, Peng; Zhong, Jiaqi

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收藏 | 浏览/下载：59/0 | 提交时间：2019/06/24

Heterodyne Laser frequency noise Power spectral density Linewidth

Laser Operating Parameters and Their Influence on the High Speed Welding of Cr-plated Sheet Steel 期刊论文 OAI收割
LASERS IN ENGINEERING, 2019, 卷号: 44, 期号: 4-6, 页码: 207-215
作者: Zhan J(占剑)

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收藏 | 浏览/下载：23/0 | 提交时间：2020/03/21

Fibre laser Cr-plated sheet steel laser welding laser power density welding speed

W43A Jet: strongly related to the magnetic field testified in laboratory 期刊论文 OAI收割
ACTA PHYSICA SINICA, 2014, 卷号: 63, 期号: 14
作者: Pei Xiao-Xing; Zhong Jia-Yong; Zhang Kai; Zheng Wu-Di; Liang Gui-Yun

收藏 | 浏览/下载：20/0 | 提交时间：2016/11/30

high energy density physics high power laser jets

W43A Jet: strongly related to the magnetic field testified in laboratory 期刊论文 OAI收割
ACTA PHYSICA SINICA, 2014, 卷号: 63, 期号: 14
Pei, XX; Zhong, JY; Zhang, K; Zheng, WD; Liang, GY; Wang, FL; Li, YT; Zhao, G

收藏 | 浏览/下载：36/0 | 提交时间：2015/04/14

high energy density physics high power laser jets

Geometrical scaling law for laser shock processing 期刊论文 OAI收割
JOURNAL OF APPLIED PHYSICS, 2013, 卷号: 114, 期号: 4, 页码: 043105/1-043105/9
作者: Wu XQ(吴先前); Tan QM(谈庆明); Huang CG(黄晨光)

收藏 | 浏览/下载：27/0 | 提交时间：2013/09/27

Physical properties Controlling mechanism Dimensional analysis Dimensionless parameters Geometrical scaling Laser power density Laser shock processing Strengthening effect Surface residual stress

Effects of laser power density on static and dynamic mechanical properties of dissimilar stainless steel welded joints 期刊论文 OAI收割
ACTA MECHANICA SINICA, 2012, 卷号: 28, 期号: 5, 页码: 1334-1339
作者: Wei YP(魏延鹏); Li MH; Yu G(虞钢); Wu XQ(吴先前); Huang CG(黄晨光)

收藏 | 浏览/下载：33/0 | 提交时间：2013/01/18

Laser welding Dynamic mechanics Strain rate Power density Industry Sheets

KW-output high beam quality diode laser array source (EI CONFERENCE) 会议论文 OAI收割
2012 International Conference on Optoelectronics and Microelectronics, ICOM 2012, August 23, 2012 - August 25, 2012, Changchun, China
作者: Zhang J.; Wang L.; Wang L.; Wang L.; Liu Y.

收藏 | 浏览/下载：38/0 | 提交时间：2013/03/25

With the advantages of small volume light weight high efficiency and long lifespan diode laser has been widely applied to industrial processing. Presently for laser used as processing light source needs to amount to dozens of KW per cm2 of power density how to increase power output and get smaller light spot for diode laser becomes a key problem. It is introduced that by designing beam shaping by ourselves and making use of optical system for beam blooming and focusing 808nm laser array composed of 20 bars eventually achieves the 1001.5w power output coupling efficiency at 90% 11mm2 of light spot through experiments which enables diode laser to be directly applied to cladding welding and so on. 2012 IEEE.

Analysis of laser jamming to satellite-based detector (EI CONFERENCE) 会议论文 OAI收割
International Symposium on Photoelectronic Detection and Imaging 2009: Laser Sensing and Imaging, June 17, 2009 - June 19, 2009, Beijing, China
作者: Guo L.-H.; Guo R.-H.; Wang S.-W.

收藏 | 浏览/下载：29/0 | 提交时间：2013/03/25

The reconnaissance satellite communication satellite and navigation satellite used in the military applications have played more and more important role in the advanced technique wars and already become the significant support and aid system for military actions. With the development of all kinds of satellites anti-satellite laser weapons emerge as the times require. The experiments and analyses of laser disturbing CCD (charge coupled detector) in near ground have been studied by many research groups but their results are not suitable to the case that using laser disturbs the satellite-based detector. Because the distance between the satellite-based detector and the ground is very large it is difficult to damage it directly. However the optical receive system of satellite detector has large optical gain so laser disturbing satellite detector is possible. In order to determine its feasibility the theoretical analyses and experimental study are carried out in the paper. Firstly the influence factors of laser disturbing satellite detector are analyzed in detail which including laser power density on the surface of the detector after long distance transmission and laser power density threshold for disturbing etc. These factors are not only induced by the satellite orbit but dependence on the following parameters: laser average power in the ground laser beam quality tracing and aiming precision and atmospheric transmission. A calculation model is developed by considering all factors which then the power density entering into the detector can be calculated. Secondly the laser disturbing experiment is performed by using LD (laser diode) with the wavelength 808 nm disturbing CCD 5 kilometer away which the disturbing threshold value is obtained as 3.5510-4mW/cm2 that coincides with other researcher's results. Finally using the theoretical model the energy density of laser on the photosensitive surface of MSTI-3 satellite detector is estimated as about 100mW/cm2 which is largely exceed the disturbing threshold and therefore verify the feasibility of using this kind of laser disturbing the satellite-based detector. According to the results. using the similar laser power density absolutely saturate the requirements to laser disturbing satellite-based detector. If considering the peak power of pulsed laser even decrease laser average power it is also possible to damage the detector. This result will provide the reliable evidences to evaluate the effect of laser disturbing satellite-based detector. 2009 SPIE.