Physics Procedia最新文献_第5页

Microstructural Information Mapping of a Plastic-deformed α-iron Plate during Tensile Tests using Pulsed Neutron Transmission 用脉冲中子透射法对α-铁板拉伸试验中塑性变形的微结构信息映射

Physics Procedia Pub Date : 2017-01-01 DOI: 10.1016/j.phpro.2017.06.006

Takashi Kamiyama , Kenji Iwase , Hirotaka Sato , Stefanus Harjo , Takayoshi Ito , Shin-ichi Takata , Kazuya Aizawa , Yoshiaki Kiyanagi

{"title":"Microstructural Information Mapping of a Plastic-deformed α-iron Plate during Tensile Tests using Pulsed Neutron Transmission","authors":"Takashi Kamiyama , Kenji Iwase , Hirotaka Sato , Stefanus Harjo , Takayoshi Ito , Shin-ichi Takata , Kazuya Aizawa , Yoshiaki Kiyanagi","doi":"10.1016/j.phpro.2017.06.006","DOIUrl":"10.1016/j.phpro.2017.06.006","url":null,"abstract":"<div><p>The spatial-dependent lattice spacing and microstructure of an α-iron plate with two notches was measured during tensile tests using a pulsed neutron transmission method to ascertain changes depending on the load. Changes in microstructural parameters such as macrostrain, microstrain, crystallite size and texture are interesting during the transition from the elastic to plastic deformation region, especially over a relatively wide field of view to see propagation of the change. The method has the capability to show changes in the position-dependence of microstructural information simultaneously over a wide area in the bulk material. Transmission spectra around the Bragg-edge regions of the neutron total cross section of α-iron were obtained, and the microstructural parameters, {110} plane spacing and its distribution, texture coefficient and crystallite size were analyzed. The spatial-dependent distributions (images) of these parameters show sample shape effects including strain concentration around the notches and the effect of dislocations being multiplied during the plastic deformation. The spatial dependence of the microstructural parameters visualized herein provides useful information for evaluating the inhomogeneous progress of deformation of the bulk engineering material.</p></div>","PeriodicalId":20407,"journal":{"name":"Physics Procedia","volume":"88 ","pages":"Pages 50-57"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.phpro.2017.06.006","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91117417","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Neutron Imaging Development at China Academy of Engineering Physics (CAEP) 中国工程物理研究院中子成像研究进展

Physics Procedia Pub Date : 2017-01-01 DOI: 10.1016/j.phpro.2017.06.021

Hang Li , Sheng Wang , Chao Cao , Heyong Huo , Bin Tang

引用次数: 13

Extended Stability of HPGe Spectrometer with Environmental Control at the High Flux Isotope Reactor 高通量同位素反应堆环境控制下HPGe谱仪扩展稳定性研究

Physics Procedia Pub Date : 2017-01-01 DOI: 10.1016/j.phpro.2017.09.046

Jordan Heim , Jonathan Nistor , David Koltick

引用次数: 1

Investigation of Spectral Lines Broadening in Femtosecond Laser Plasma Generated on the Surface of the Barium Water Solutions 飞秒激光等离子体在钡水溶液表面谱线展宽的研究

Physics Procedia Pub Date : 2017-01-01 DOI: 10.1016/j.phpro.2017.01.027

M.Yu. Babiy, S.S. Golik, A.A. Ilyin, Yu.S. Biryukova, T.M. Agapova, V.V. Lisitsa

引用次数: 1

Structure and Electronic Properties of Nano-complex CCl4…Cr(AcacCl)3 on Evidence Derived from Vibrational Spectroscopy 纳米配合物CCl4…Cr(AcacCl)3的结构和电子性质——基于振动谱的证据

Physics Procedia Pub Date : 2017-01-01 DOI: 10.1016/j.phpro.2017.01.012

S.N. Slabzhennikov, L.A. Kuarton, O.B. Ryabchenko

引用次数: 0

Weldability of Aluminium Alloys for Automotive Applications 汽车用铝合金的可焊性

Physics Procedia Pub Date : 2017-01-01 DOI: 10.1016/j.phpro.2017.08.011

D. Löveborn, J.K. Larsson, K.-A. Persson

{"title":"Weldability of Aluminium Alloys for Automotive Applications","authors":"D. Löveborn, J.K. Larsson, K.-A. Persson","doi":"10.1016/j.phpro.2017.08.011","DOIUrl":"10.1016/j.phpro.2017.08.011","url":null,"abstract":"<div><p>Restrictions in CO<sub>2</sub>-emissions have caused increased demands on decreased weight and increased use of lightweight materials in the automotive industry. Aluminium has shown to be of great interest due to its beneficial weight to strength ratio, and are suitable for hang-on parts such as roof, doors etc. However, the use of aluminium requires reliable joining techniques. This project has been focusing on laser welding of aluminium. It have been reported earlier that hot cracks and porosity are common defects while joining aluminium with laser welding. The aim with this project has been to produce crack free laser welds while joining thin aluminium sheets. Two different optics have been used in this project, oscillating- and triple-spot optics. The results from the experiments show that both the oscillating optics and the triple-spot optics can produce crack free welds. The amount of pores is shown to be low for both cases. The results do also show that the amount of pores in the welds increases with the weld length while the flange length is of minor impact. The mechanical properties are similar for the both optics. The oscillation specimens receive a higher tensile strength while the triple-spot specimens receive a larger elongation at break value.</p></div>","PeriodicalId":20407,"journal":{"name":"Physics Procedia","volume":"89 ","pages":"Pages 89-99"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.phpro.2017.08.011","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80853998","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 26

The Structure and Properties of the Samples Produced by Selective Laser Melting of 410L Steel-based Metal Powder 410L钢基金属粉末选择性激光熔化试样的组织和性能

Physics Procedia Pub Date : 2017-01-01 DOI: 10.1016/j.phpro.2017.08.013

Artem Deev, Pavel Kuznetsov, Anton Zhukov, Vitaliy Bobyr

{"title":"The Structure and Properties of the Samples Produced by Selective Laser Melting of 410L Steel-based Metal Powder","authors":"Artem Deev, Pavel Kuznetsov, Anton Zhukov, Vitaliy Bobyr","doi":"10.1016/j.phpro.2017.08.013","DOIUrl":"10.1016/j.phpro.2017.08.013","url":null,"abstract":"<div><p>Additive technologies, which obtained the wide spreading in the last decade, allow producing items of any shape from metal materials practically without additional mechanical treatment. This approach based on the layer by layer melting of powder material accordingly to the premade 3D-CAD model, provides the geometrical accuracy which mostly depends on the size of the used material. In the present study, as material a 410 L steel powder was chosen, for which the basic dependencies between the selective laser melting (SLM) parameters and the mechanical properties were determined. Trial batches of standard samples for uniaxial tension and impact strength tests (according to the ASTM A370 and ASTM E8M standards) were produced. It was shown that in the as build (after SLM) the fracture appeared to be brittle with the impact strength 3-5J/cm<sup>2</sup>. The carried out heat treatment of quenching-tempering cycle and subsequent tests provide the viscous fracture and evaluation of impact strength up to 20-30J/cm<sup>2</sup>. Presumably, this is due to a refinement of the grain structure and the inner stresses reduction of the samples, which also acknowledges the execution EBSD analysis, which points to the presence of quenched and tempered martensite. The presence of high inner stresses can be attributed to two α-γ-α transformations that were revealed by dilatometry investigation. In the range of cooling or heating rates from 1 to 500°C/s temperatures of phase transformation are shifted.</p></div>","PeriodicalId":20407,"journal":{"name":"Physics Procedia","volume":"89 ","pages":"Pages 31-38"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.phpro.2017.08.013","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81932474","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6

Electrostatic Field Influence on Luminescence Features of Cadmium Sulphide Quantum Dots in Silica Matrix 静电场对二氧化硅基体中硫化镉量子点发光特性的影响

Physics Procedia Pub Date : 2017-01-01 DOI: 10.1016/j.phpro.2017.01.004

S.S. Voznesenskiy , A.A. Sergeev , I.V. Postnova , Y.A. Shchipunov

引用次数: 2

Applications of Neutron Radiography for the Nuclear Power Industry 中子射线照相技术在核动力工业中的应用

Physics Procedia Pub Date : 2017-01-01 DOI: 10.1016/j.phpro.2017.06.009

Aaron E. Craft , John P. Barton

{"title":"Applications of Neutron Radiography for the Nuclear Power Industry","authors":"Aaron E. Craft , John P. Barton","doi":"10.1016/j.phpro.2017.06.009","DOIUrl":"10.1016/j.phpro.2017.06.009","url":null,"abstract":"<div><p>The World Conference on Neutron Radiography (WCNR) and International Topical Meeting on Neutron Radiography (ITMNR) series have been running over 35 years. The most recent event, ITMNR-8, focused on industrial applications and was the first time this series was hosted in China. In China, more than twenty new nuclear power plants are under construction and plans have been announced to increase the nuclear capacity by a factor of three within fifteen years. There are additional prospects in many other nations. Neutron tests were vital during previous developments of materials and components for nuclear power applications, as reported in the WCNR and ITMNR conference series. For example a majority of the 140 papers in the Proceedings of the First WCNR are for the benefit of the nuclear power industry. Many of those techniques are being utilized and advanced to the present time. Neutron radiography of irradiated nuclear fuel provides more comprehensive information about the internal condition of irradiated nuclear fuel than any other non-destructive technique to date. Applications include examination of nuclear waste, nuclear fuels, cladding, control elements, and other critical components. In this paper, applications of neutron radiography techniques developed and applied internationally for the nuclear power industry since the earliest years are reviewed, and the question is asked whether neutron test techniques, in general, can be of value in development of the present and future generations of nuclear power plants world-wide.</p></div>","PeriodicalId":20407,"journal":{"name":"Physics Procedia","volume":"88 ","pages":"Pages 73-80"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.phpro.2017.06.009","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76166045","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 23

Accelerated Learning: Undergraduate Research Experiences at the Texas A&M Cyclotron Institute 加速学习:本科生在德州农工大学回旋加速器研究所的研究经历

Physics Procedia Pub Date : 2017-01-01 DOI: 10.1016/j.phpro.2017.09.029

S.J. Yennello

{"title":"Accelerated Learning: Undergraduate Research Experiences at the Texas A&M Cyclotron Institute","authors":"S.J. Yennello","doi":"10.1016/j.phpro.2017.09.029","DOIUrl":"10.1016/j.phpro.2017.09.029","url":null,"abstract":"<div><p>The Texas A&M Cyclotron Institute (TAMU CI) has had an NSF funded Research Experiences for Undergraduates program since 2004. Each summer about a dozen students from across the country join us for the 10-week program. They are each imbedded in one of the research groups of the TAMU CI and given their own research project. While the main focus of their effort is their individual research project, we also have other activities to broaden their experience. For instance, one of those activities has been involvement in a dedicated group experiment. Because not every experimental group will run during those 10 weeks and the fact that some of the students are in theory research groups, a group research experience allows everyone to actually be involved in an experiment using the accelerator. In stark contrast to the REU students’ very focused experience during the summer, Texas A&M undergraduates can be involved in research projects at the Cyclotron throughout the year, often for multiple years. This extended exposure enables Texas A&M students to have a learning experience that cannot be duplicated without a local accelerator. The motivation for the REU program was to share this accelerator experience with students who do not have that opportunity at their home institution.</p></div>","PeriodicalId":20407,"journal":{"name":"Physics Procedia","volume":"90 ","pages":"Pages 354-363"},"PeriodicalIF":0.0,"publicationDate":"2017-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.phpro.2017.09.029","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77385089","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3