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Journal of Metallurgy最新文献

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Internal Demagnetizing Factor in Ferrous Metals 黑色金属中的内部退磁因子
Journal of Metallurgy Pub Date : 2012-11-05 DOI: 10.1155/2012/752871
J. Takács, G. Kovacs, L. Varga
{"title":"Internal Demagnetizing Factor in Ferrous Metals","authors":"J. Takács, G. Kovacs, L. Varga","doi":"10.1155/2012/752871","DOIUrl":"https://doi.org/10.1155/2012/752871","url":null,"abstract":"Modelling the saturation major loop of a ferrous metal produces the intrinsic magnetization parameters; fitting the measured commutation curve, however, can yield different results. The relation of the intrinsic loci of the vertices of the minor loops () to the experimental curve () is investigated. The two-way transformation between the two curves is formulated in closed mathematical form with the help of the internal demagnetization factor, . The method is applied to four ferrous metals, with widely different intrinsic properties (soft nonoriented Fe-Si steel, normalized low carbon steel, and Finemet in nanocrystalline and amorphous state) supporting the predictions of the proposal. The developed relationship is model independent and it is shown that the factor depends linearly on coercivity based on experimental evidence.","PeriodicalId":16342,"journal":{"name":"Journal of Metallurgy","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90891673","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Mutual Influence of Special Components in Baotou Steel Blast Furnace Slag on the Crystallization Behavior of Glass 包钢高炉渣中特殊组分对玻璃结晶行为的相互影响
Journal of Metallurgy Pub Date : 2012-10-17 DOI: 10.1155/2012/954021
Yi-ci Wang, Q. Jiang, G. Luo, W. Yu, Yanpeng Ban
{"title":"Mutual Influence of Special Components in Baotou Steel Blast Furnace Slag on the Crystallization Behavior of Glass","authors":"Yi-ci Wang, Q. Jiang, G. Luo, W. Yu, Yanpeng Ban","doi":"10.1155/2012/954021","DOIUrl":"https://doi.org/10.1155/2012/954021","url":null,"abstract":"In the process of glass-ceramics prepared with Baotou steel blast furnace slag, quartz sand, and other raw materials by melting method, the mutual influence of the special components such as CaF2, REXOY, TiO2, K2O, and Na2O in the blast furnace slag on the crystallization behavior of parent glass was investigated using differential thermal analysis (DTA) and X-ray diffraction (XRD). The results show that the special components in slag can reduce the crystallization temperature and promote crystallization of glass phase, which belongs to surface crystallization of glass, and they cannot play the role of the nucleating agent; the major crystal phase composed of diopside, diopside containing aluminum and anorthite, is slightly different from the expected main crystal phase of diopside. Therefore, the nucleating agents of proper species and quantity must be added into the raw materials in order to obtain glass-ceramics. The results have important theoretical guidance meaning for realizing industrial production of Baotou steel blast furnace slag glass-ceramics preparation.","PeriodicalId":16342,"journal":{"name":"Journal of Metallurgy","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77186484","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Mould Filling Ability Characterisation of Cast Aluminium Alloys Using Design of Experiments 用试验设计表征铸铝合金充型能力
Journal of Metallurgy Pub Date : 2012-10-02 DOI: 10.1155/2012/624650
S. Santhi, S. Sakri, D. H. Rao, S. Sundarrajan
{"title":"Mould Filling Ability Characterisation of Cast Aluminium Alloys Using Design of Experiments","authors":"S. Santhi, S. Sakri, D. H. Rao, S. Sundarrajan","doi":"10.1155/2012/624650","DOIUrl":"https://doi.org/10.1155/2012/624650","url":null,"abstract":"Mould filling ability characteristic has been influencing the liquid metal flow, heat transfer, and solidification there by affecting the quality of aerospace castings. Mould filling is a critical parameter in the production of sound and quality castings, especially in the case of complex-shaped castings where section thickness is varying considerably. The mould filling ability of aluminium alloys LM6 and LM25 has been studied in the present investigation. Experimentation has been carried out using orthogonal array experimental layout. The process parameters studied in the present investigation are alloy composition, sand fineness, mould coating, and pouring temperature. The mould filling ability of selected aluminium alloy has been studied using pin test piece with cylindrical cores. The results from experimentation are analyzed to find the influence of the process parameters on mould filling ability. Based on the above, LM6 alloy has been found to have better mould filling ability characteristics and the analysis of variance has also revealed the same optimum factor combination.","PeriodicalId":16342,"journal":{"name":"Journal of Metallurgy","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84933367","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 8
Thermal and Mechanical Treatments of Al, Al Alloys, and Other Lightweight Metals and Alloys 铝，铝合金和其他轻质金属和合金的热处理和机械处理
Journal of Metallurgy Pub Date : 2012-09-19 DOI: 10.1155/2012/294874
H. Mcqueen, E. Evangelista, M. E. Kassner, C. Lee
{"title":"Thermal and Mechanical Treatments of Al, Al Alloys, and Other Lightweight Metals and Alloys","authors":"H. Mcqueen, E. Evangelista, M. E. Kassner, C. Lee","doi":"10.1155/2012/294874","DOIUrl":"https://doi.org/10.1155/2012/294874","url":null,"abstract":"","PeriodicalId":16342,"journal":{"name":"Journal of Metallurgy","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88418435","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Study of Tracer Diffusion Mechanism in Amorphous Metal 示踪剂在非晶金属中的扩散机理研究
Journal of Metallurgy Pub Date : 2012-07-29 DOI: 10.1155/2012/517230
P. H. Kien, H. V. Hue, P. K. Hung
{"title":"Study of Tracer Diffusion Mechanism in Amorphous Metal","authors":"P. H. Kien, H. V. Hue, P. K. Hung","doi":"10.1155/2012/517230","DOIUrl":"https://doi.org/10.1155/2012/517230","url":null,"abstract":"The statistical relaxation (SR) simulation has been conducted to study the behavior of simplexes and bubbles (BB) in amorphous Co metal containing 2×105 atoms. The simulation reveals that the fraction of 4-simplex increases and 𝑛-simplex (𝑛>4) decreases depending upon relaxation degree. The simulation found that a large number of BB vary upon relaxation degree, which could play a role of diffusion vehicle for Co atoms in amorphous matrix. The idea of the diffusion mechanism in amorphous metal is described as follows: the elemental atomic movement includes a jump of neighboring atom into the BB and then a collective displacement of a large number of atoms around BB.","PeriodicalId":16342,"journal":{"name":"Journal of Metallurgy","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-07-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79689933","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Influence of Manganese Content on the Dissolution of the Fe3C Iron Carbide Phase (Cementite) during a Graphitization Anneal of Spheroidal Graphite Cast Iron 锰含量对球墨铸铁石墨化退火中Fe3C碳化铁相(渗碳体)溶出的影响
Journal of Metallurgy Pub Date : 2012-05-20 DOI: 10.1155/2012/841901
Jalel Briki, S. Slima
{"title":"Influence of Manganese Content on the Dissolution of the Fe3C Iron Carbide Phase (Cementite) during a Graphitization Anneal of Spheroidal Graphite Cast Iron","authors":"Jalel Briki, S. Slima","doi":"10.1155/2012/841901","DOIUrl":"https://doi.org/10.1155/2012/841901","url":null,"abstract":"The transformation of iron carbide cementite was investigated on spheroidal graphite containing different contents of manganese. The isothermal maintain were carried out at 600, 650, 700, and 750°C for periods of up to one hour. It was observed that the kinetics of graphitization is slowed even more than cast iron rich in manganese.","PeriodicalId":16342,"journal":{"name":"Journal of Metallurgy","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83115916","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Friction Stir Welding of Al 5052 with Al 6061 Alloys al5052与al6061合金的搅拌摩擦焊接
Journal of Metallurgy Pub Date : 2012-05-08 DOI: 10.1155/2012/303756
N. T. Kumbhar, K. Bhanumurthy
{"title":"Friction Stir Welding of Al 5052 with Al 6061 Alloys","authors":"N. T. Kumbhar, K. Bhanumurthy","doi":"10.1155/2012/303756","DOIUrl":"https://doi.org/10.1155/2012/303756","url":null,"abstract":"Friction stir welding (FSW), a solid-state joining technique, is being extensively used in similar as well as dissimilar joining of Al, Mg, Cu, Ti, and their alloys. In the present study, friction stir welding of two aluminium alloys—AA6061 and AA5052—was carried out at various combinations of tool rotation speeds and tool traverse speeds. The transverse cross-section of the weld was used for optical as well as electron microscopy observations. The microstructural studies were used to get an indication of the extent of material mixing both at the macro- and microscales. It was observed that, at the interface region, both materials exhibited similar texture despite the nonrigorous mixing of the materials in the nugget. The extent of interdiffusion of alloying elements at the interface was studied using electron probe microanalysis. The tensile testing evaluation of these specimens showed good mechanical properties. The interdiffusion of alloying elements and development of similar orientations in the nugget could have contributed to the better tensile properties of the friction-stir-welded AA5052-AA6061 specimens.","PeriodicalId":16342,"journal":{"name":"Journal of Metallurgy","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77721087","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 73
Surface Modification of Light Alloys by Low-Energy High-Current Pulsed Electron Beam 低能大电流脉冲电子束对轻合金表面的改性研究
Journal of Metallurgy Pub Date : 2012-03-27 DOI: 10.1155/2012/762125
X. D. Zhang, S. Hao, T. Grosdidier, J. Zou, B. Gao, B. Bolle, N. Allain-Bonasso, Ying Qin, Xiaoliang Li, C. Dong
{"title":"Surface Modification of Light Alloys by Low-Energy High-Current Pulsed Electron Beam","authors":"X. D. Zhang, S. Hao, T. Grosdidier, J. Zou, B. Gao, B. Bolle, N. Allain-Bonasso, Ying Qin, Xiaoliang Li, C. Dong","doi":"10.1155/2012/762125","DOIUrl":"https://doi.org/10.1155/2012/762125","url":null,"abstract":"This paper reviews results obtained by the research groups developing the low-energy high-current pulsed electron beam (LEHCPEB) in Dalian (China) and Metz (France) on the surface treatment of light alloys. The pulsed electron irradiation induces an ultra-fast thermal cycle at the surface combined with the formation of thermal stress and shock waves. As illustrated for Mg alloys and Ti, this results in deep subsurface hardening (over several 100 μm) which improves the wear resistance. The analysis of the top surface melted surface of light alloys also often witnesses evaporation and condensation of chemical species. This phenomenon can significantly modify the melt chemistry and was also suggested to lead to the development of specific solidification textures in the rapidly solidified layer. The potential use of the LEHCPEB technique for producing thermomechanical treatments under the so-called heating mode and, thus, modify the surface crystallographic texture, and enhance solid-state diffusion is also demonstrated in the case of the FeAl intermetallic compound.","PeriodicalId":16342,"journal":{"name":"Journal of Metallurgy","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83159769","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 16
Developing 1D MM of Axisymmetric Transient Quenched Chromium Steel to Determine LHP 轴对称瞬态淬火铬钢的一维MM法测定LHP
Journal of Metallurgy Pub Date : 2012-03-22 DOI: 10.1155/2012/539823
A. Elmaryami, B. Omar
{"title":"Developing 1D MM of Axisymmetric Transient Quenched Chromium Steel to Determine LHP","authors":"A. Elmaryami, B. Omar","doi":"10.1155/2012/539823","DOIUrl":"https://doi.org/10.1155/2012/539823","url":null,"abstract":"The modelling of an axisymmetric industrial quenched chromium steel bar AISI-SAE 8650H based on finite element method has been produced to investigate the impact of process history on metallurgical and material properties. Mathematical modelling of 1-dimensional line (radius) element axisymmetric model has been adopted to predict temperature history and consequently the hardness of the quenched steel bar at any point (node). The lowest hardness point (LHP) is determined. In this paper hardness in specimen points was calculated by the conversion of calculated characteristic cooling time for phase transformation t8/5 to hardness. The model can be employed as a guideline to design cooling approach to achieve desired microstructure and mechanical properties such as hardness. The developed mathematical model is converted to a computer program. This program can be used independently or incorporated into a temperature history calculator to continuously calculate and display temperature history of the industrial quenched steel bar and thereby calculate LHP. The developed program from the mathematical model has been verified and validated by comparing its hardness results with commercial finite element software results.","PeriodicalId":16342,"journal":{"name":"Journal of Metallurgy","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74167667","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 11
Control of Carbides and Graphite in Cast Irons Type Alloy’s Microstructures for Hot Strip Mills 热连轧铸铁型合金组织中碳化物和石墨的控制
Journal of Metallurgy Pub Date : 2012-03-14 DOI: 10.1155/2012/438659
S. Bravo, K. Yamamoto, H. Miyahara, K. Ōgi
{"title":"Control of Carbides and Graphite in Cast Irons Type Alloy’s Microstructures for Hot Strip Mills","authors":"S. Bravo, K. Yamamoto, H. Miyahara, K. Ōgi","doi":"10.1155/2012/438659","DOIUrl":"https://doi.org/10.1155/2012/438659","url":null,"abstract":"The carbide and graphite formation and redistribution of alloy elements during solidification were investigated on high-speed steel (HS) and Ni-hard type cast irons with Nb and V. The crystallization of hypereutectic HSS proceeds in the order of primary MC, γ","PeriodicalId":16342,"journal":{"name":"Journal of Metallurgy","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2012-03-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82175978","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 7
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