Journal of Laser Applications最新文献_第2页

Effect of preheating temperature on the microscopic structure and mechanical performance of pulsed laser welding in sheet AZ31 alloy 预热温度对板材 AZ31 合金脉冲激光焊接微观结构和机械性能的影响

IF 2.1 4区工程技术

Journal of Laser Applications Pub Date : 2024-03-28 DOI: 10.2351/7.0001214

Pengfei Zhao, Xiaobing Zhang, Shuwang Bian, Wenlong Zhang, Zhanyi Cao

引用次数: 0

Direct observation and quantification of nanosecond laser induced amorphization inside silicon 纳秒激光诱导硅内部非晶化的直接观测和量化

IF 2.1 4区工程技术

Journal of Laser Applications Pub Date : 2024-03-27 DOI: 10.2351/7.0001305

Xinya Wang, Lanh Trinh, Xiaoming Yu, Matthew J. Berg, Sajed Hosseini-Zavareh, Brice Lacroix, Pingping Chen, Ruqi Chen, Bai Cui, Shuting Lei

引用次数: 0

Prediction of laser-welded deformation using artificial neural networks 利用人工神经网络预测激光焊接变形

IF 2.1 4区工程技术

Journal of Laser Applications Pub Date : 2024-03-26 DOI: 10.2351/7.0001307

Zhenfei Guo, Hao Jiang, R. Bai, Zhenkun Lei

引用次数: 0

Numerical investigation of laser doping parameters for semi-insulating 4H-SiC substrate 半绝缘 4H-SiC 衬底激光掺杂参数的数值研究

IF 2.1 4区工程技术

Journal of Laser Applications Pub Date : 2024-03-26 DOI: 10.2351/7.0001158

C. Sugrim, Gunjan Kulkarni, Yahya Bougdid, Kevin Heylman, Ranganathan Kumar, Aravinda Kar, Kalpathy Sundaram

{"title":"Numerical investigation of laser doping parameters for semi-insulating 4H-SiC substrate","authors":"C. Sugrim, Gunjan Kulkarni, Yahya Bougdid, Kevin Heylman, Ranganathan Kumar, Aravinda Kar, Kalpathy Sundaram","doi":"10.2351/7.0001158","DOIUrl":"https://doi.org/10.2351/7.0001158","url":null,"abstract":"Semi-insulating (SI) 4H-polytype of silicon carbide (SiC) is a highly desirable wide bandgap semiconductor material for various applications in challenging environments owing to its exceptional characteristics such as high melting point, remarkable thermal conductivity, strong breakdown field, and excellent resistance to oxidation. This study investigates the critical laser processing parameters to operate a pulsed UV 355 nm laser to dope high-purity (HP) SI 4H-SiC substrates with boron. The doping process parameters are examined and simulated for this UV laser doping system using a liquid precursor of boron. Boron atoms create a dopant energy level of 0.3eV in the doped HP 4H-SiC substrates. Diffusion of boron atoms into 4H-SiC substrates modifies the hole density at 0.3eV energy level, and causing a variation in the dynamic refraction index, and absorption index. Consequently, the optical properties of boron doped samples, namely, transmittance, reflectance, and absorbance, can be modified. The current simulation reported in this study explains the motivation of UV optical doping strategy to dope SiC substrates. A beam homogenizer was used to control the laser spot used to generate doping process. The advantage of the beam homogenizer is demonstrated by producing flat-top beams with uniform intensity over a certain area defined by the focusing lens choice. A simple theoretical model is used to select the laser processing parameters for doping SiC substrates. These modeled parameters are used to determine the efficient laser processing parameters for our doping experiments.","PeriodicalId":50168,"journal":{"name":"Journal of Laser Applications","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2024-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140380657","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Optimization and GRA prediction of Al–Cu pulsed laser welding process based on RSM 基于 RSM 的铝铜脉冲激光焊接工艺优化和 GRA 预测

IF 2.1 4区工程技术

Journal of Laser Applications Pub Date : 2024-03-25 DOI: 10.2351/7.0001249

Xueqian Qin, Yaowu Zhao, Yao Wang, Junjie Zeng, Liao Zhou, Jinguo Ge, Qingyuan Liu, Jia Zhou, Yuhong Long

引用次数: 0

Research on automotive scrap metal classification method using laser-induced breakdown spectroscopy and two-step clustering algorithm 利用激光诱导击穿光谱和两步聚类算法的汽车废金属分类方法研究

IF 2.1 4区工程技术

Journal of Laser Applications Pub Date : 2024-03-25 DOI: 10.2351/7.0001289

Jingjun Lin, Panyang Dai, Changjin Che, Xiaomei Lin, Yao Li, Jiangfei Yang, Yutao Huang, Yongkang Ren, Xin Zhen, Xingyue Yang

{"title":"Research on automotive scrap metal classification method using laser-induced breakdown spectroscopy and two-step clustering algorithm","authors":"Jingjun Lin, Panyang Dai, Changjin Che, Xiaomei Lin, Yao Li, Jiangfei Yang, Yutao Huang, Yongkang Ren, Xin Zhen, Xingyue Yang","doi":"10.2351/7.0001289","DOIUrl":"https://doi.org/10.2351/7.0001289","url":null,"abstract":"In the recycling of scrap metal, the establishment of the classification database of recyclables has the advantages of fast classification speed and high analysis accuracy. However, the classification and recycling of unknown samples become highly significant due to the extensive variety of standard metal samples and the challenges in obtaining them. In this study, a method for multi-element classification of automotive scrap metals in general environmental conditions was achieved by utilizing laser-induced breakdown spectroscopy (LIBS) and two-step clustering algorithm (K-means, hierarchical clustering). The two unsupervised learning algorithms were employed to cluster the LIBS spectral data of 60 automotive scrap metal samples rapidly and hierarchically. Three rare metal elements and three elements for distinguishing metal categories were selected to meet the recycling requirements. After applying the multiplicative scatter correction to the spectral data for calibration, the initial clustering clusters were determined using the Davies–Bouldin index, Calinski–Harabasz index, and silhouette coefficient. Then, the Kruskal–Wallis test was conducted on each cluster to check the significance. The clusters that failed the test were split and reclustered until all clusters met the significance criterion (α=0.05). The accuracy of the proposed method for classifying the collected automotive scrap metals reached 97.6%. This indicates the great potential of this method in the field of automotive scrap metal classification.","PeriodicalId":50168,"journal":{"name":"Journal of Laser Applications","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2024-03-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140383206","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Preparation of Ag-Cu nanoparticle film using a dual-beam pulsed laser deposition for power electronic packaging 利用双束脉冲激光沉积法制备用于电力电子封装的银铜纳米粒子薄膜

IF 2.1 4区工程技术

Journal of Laser Applications Pub Date : 2024-03-25 DOI: 10.2351/7.0001321

Bolong Zhou, Qiang Jia, Yishu Wang, Dan Li, Hongqiang Zhang, Huan Hu, Limin Ma, Guisheng Zou, Fu Guo

引用次数: 0

Effects of beam oscillation on porosity and microstructure of laser welded TC11 titanium alloy 光束振荡对激光焊接 TC11 钛合金孔隙率和微观结构的影响

IF 2.1 4区工程技术

Journal of Laser Applications Pub Date : 2024-03-20 DOI: 10.2351/7.0001262

Can Luo, Wei Peng, Chen Zhang

引用次数: 0

Inline failure detection in laser beam welding of battery cells: Acoustic and spectral emission analysis for quality monitoring 电池单元激光束焊接中的在线故障检测：用于质量监控的声学和光谱发射分析

IF 2.1 4区工程技术

Journal of Laser Applications Pub Date : 2024-03-14 DOI: 10.2351/7.0001216

Johannes Heilmeier, Michael K. Kick, Sophie Grabmann, Tatek Muschol, Franz Schlicht, Felix von Hundelshausen, Hans-Georg von Ribbeck, T. Weiss, M. F. Zaeh

{"title":"Inline failure detection in laser beam welding of battery cells: Acoustic and spectral emission analysis for quality monitoring","authors":"Johannes Heilmeier, Michael K. Kick, Sophie Grabmann, Tatek Muschol, Franz Schlicht, Felix von Hundelshausen, Hans-Georg von Ribbeck, T. Weiss, M. F. Zaeh","doi":"10.2351/7.0001216","DOIUrl":"https://doi.org/10.2351/7.0001216","url":null,"abstract":"The mobility sector is considered a major contributor to global greenhouse gas emissions and air pollution. As a result, many countries have initiated the transition from fossil fuel-powered to electrified powertrains. This transformation of the powertrain concept will lead to a rapid increase in the production of electric vehicles and, therefore, to a high demand for so-called traction batteries. As a production step of the traction batteries, a connection between the cell connector and the terminal of the battery cell has to be manufactured. For this purpose, laser beam welding is a reliable and efficient joining technique. In order to ensure continuous quality of the welding process during production and to detect defects in real time, reliable process monitoring is required. In this study, spectral and acoustic emissions during laser beam welding were recorded using a laser welding monitor and an optical microphone. For determining possible correlations between the signals and weld defects, various failure cases were generated by the systematic placement of disturbance elements. These elements included a contaminated surface, a gap between the cell connector and the battery cell, and a misalignment of the cell connector. Based on the recorded signals, statistical metrics were calculated. Finally, weld seams with and without defects were compared to assess the capability of both sensor systems for detecting the weld defects.","PeriodicalId":50168,"journal":{"name":"Journal of Laser Applications","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2024-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140392197","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Rapid dissolution without elemental fractionation by laser driven hydrothermal processing 通过激光驱动水热处理实现无元素分馏的快速溶解

IF 2.1 4区工程技术

Journal of Laser Applications Pub Date : 2024-03-12 DOI: 10.2351/7.0001297

Chad B. Durrant, G. Brennecka, J. Wimpenny, D. Weisz, Raymond Mariella

{"title":"Rapid dissolution without elemental fractionation by laser driven hydrothermal processing","authors":"Chad B. Durrant, G. Brennecka, J. Wimpenny, D. Weisz, Raymond Mariella","doi":"10.2351/7.0001297","DOIUrl":"https://doi.org/10.2351/7.0001297","url":null,"abstract":"Traditional dissolution of geologic samples often requires a significant time investment. Here, we present an alternative method for the dissolution of geologic materials using laser-driven hydrothermal processing (LDHP). LDHP uses laser energy directed onto a submerged sample, which increases the temperature and pressure at the liquid–sample interface and drives the hydrothermal dissolution coupled with photomechanical spallation, an ablative process. This uses focused 527 nm laser energy at 40 W average power, 1 kHz pulse repetition rate, and 115 ns pulse duration. When LDHP is performed on basalt geostandards (BCR-2 and BHVO-2) using the conditions outlined, we show that LDHP does not produce significant elemental fractionation and, thus, can be considered an alternative processing method to traditional mechanical crushing and acid digestion. Additionally, it is possible using LDHP to utilize the spatially confined beam to target and selectively isolate individual phases in a rock, potentially alleviating the need for mechanical separation of inclusions that are difficult to physically isolate. Furthermore, using this outlined method of LDHP, we demonstrate full dissolution of 120 mg of obsidian in 85 minu, meaning that LDHP is a potentially very useful method when sample processing is time sensitive.","PeriodicalId":50168,"journal":{"name":"Journal of Laser Applications","volume":null,"pages":null},"PeriodicalIF":2.1,"publicationDate":"2024-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140248516","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0