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Settling of undissolved zirconium particles in pure magnesium melts 纯镁熔体中未溶解锆颗粒的沉淀
Journal of Light Metals Pub Date : 2001-08-01 DOI: 10.1016/S1471-5317(01)00009-8
Ma Qian , L Zheng , D Graham , M.T Frost , D.H StJohn
{"title":"Settling of undissolved zirconium particles in pure magnesium melts","authors":"Ma Qian ,&nbsp;L Zheng ,&nbsp;D Graham ,&nbsp;M.T Frost ,&nbsp;D.H StJohn","doi":"10.1016/S1471-5317(01)00009-8","DOIUrl":"https://doi.org/10.1016/S1471-5317(01)00009-8","url":null,"abstract":"<div><p><span>Zirconium is a remarkable grain refiner for magnesium alloys and is currently introduced into magnesium alloys primarily in the form of a Mg–Zr master alloy (Zirmax</span><sup>®</sup> a Mg–33.3Zr alloy supplied by Magnesium Elektron). Owing to the difficulties of attaining complete dissolution, undissolved zirconium particles are often observed in Zirmax<sup>®</sup> alloyed magnesium microstructures in the form of both isolated individual particles varying from submicrometre to greater than 10 μm, and various sizes of clusters that contain a number of zirconium particles. Aimed at improving the alloying efficiency with Zirmax<sup>®</sup> and eliminating these undesirable large zirconium inclusions prior to pouring, this paper provides a detailed theoretical and experimental study of the settling behaviour of undissolved zirconium particles in pure magnesium melts. Various characteristics of the settling behaviour of zirconium particles are clarified based on the good agreement achieved between the experimental observations and theoretical predictions. In addition, it is also shown that wet chemical analysis of the total zirconium content in samples taken after different settling times at temperature can be an effective approach for evaluating the settling behaviour of undissolved zirconium particles in pure magnesium melts.</p></div>","PeriodicalId":100798,"journal":{"name":"Journal of Light Metals","volume":"1 3","pages":"Pages 157-165"},"PeriodicalIF":0.0,"publicationDate":"2001-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1471-5317(01)00009-8","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72106267","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: 69
Recycling of aluminum – effect of fluoride additions on the salt viscosity and on the alumina dissolution 铝的回收——添加氟化物对盐粘度和氧化铝溶解的影响
Journal of Light Metals Pub Date : 2001-08-01 DOI: 10.1016/S1471-5317(01)00013-X
Jorge Alberto Soares Tenorio, Marcelo Carboneri Carboni, Denise Crocce Romano Espinosa
{"title":"Recycling of aluminum – effect of fluoride additions on the salt viscosity and on the alumina dissolution","authors":"Jorge Alberto Soares Tenorio,&nbsp;Marcelo Carboneri Carboni,&nbsp;Denise Crocce Romano Espinosa","doi":"10.1016/S1471-5317(01)00013-X","DOIUrl":"https://doi.org/10.1016/S1471-5317(01)00013-X","url":null,"abstract":"<div><p>The objectives of this work are to study the influence of fluoride additions to molten salt flux used in aluminum recycling on the viscosity and on the dissolution of alumina. These parameters were studied to clarify the phenomena that occur inside the rotary furnace, because there is still very little fundamental research about this process. First, an apparatus was set to measure the viscosity of molten salt fluxes. Second, equimolar mixtures of NaCl and KCl with NaF, KF and CaF<sub>2</sub> additions up to 5 wt% were prepared and melted in a laboratory furnace. Alumina rods were immersed in the molten flux, and the measurements of the reduction of the external diameter were taken at periodic times. The additions of fluorides diminish the viscosity of the equimolar mixture of NaCl and KCl, and fluoride additions also improve the dissolution velocity and corrosive attack on alumina.</p></div>","PeriodicalId":100798,"journal":{"name":"Journal of Light Metals","volume":"1 3","pages":"Pages 195-198"},"PeriodicalIF":0.0,"publicationDate":"2001-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1471-5317(01)00013-X","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72115249","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: 22
Settling of undissolved zirconium particles in pure magnesium melts 未溶解锆颗粒在纯镁熔体中的沉降
Journal of Light Metals Pub Date : 2001-08-01 DOI: 10.1016/S1471-5317(01)00009-8
M. Qian, L. Zheng, D. Graham, M. Frost, D. StJohn
{"title":"Settling of undissolved zirconium particles in pure magnesium melts","authors":"M. Qian, L. Zheng, D. Graham, M. Frost, D. StJohn","doi":"10.1016/S1471-5317(01)00009-8","DOIUrl":"https://doi.org/10.1016/S1471-5317(01)00009-8","url":null,"abstract":"","PeriodicalId":100798,"journal":{"name":"Journal of Light Metals","volume":"15 1","pages":"157-165"},"PeriodicalIF":0.0,"publicationDate":"2001-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75467115","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: 69
Recycling of aluminum – effect of fluoride additions on the salt viscosity and on the alumina dissolution 铝的回收——加氟对盐粘度和氧化铝溶解的影响
Journal of Light Metals Pub Date : 2001-08-01 DOI: 10.1016/S1471-5317(01)00013-X
J. Tenório, M. Carboni, D. Espinosa
{"title":"Recycling of aluminum – effect of fluoride additions on the salt viscosity and on the alumina dissolution","authors":"J. Tenório, M. Carboni, D. Espinosa","doi":"10.1016/S1471-5317(01)00013-X","DOIUrl":"https://doi.org/10.1016/S1471-5317(01)00013-X","url":null,"abstract":"","PeriodicalId":100798,"journal":{"name":"Journal of Light Metals","volume":"51 1","pages":"195-198"},"PeriodicalIF":0.0,"publicationDate":"2001-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86180599","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: 22
The Alstruc homogenization model for industrial aluminum alloys 工业铝合金alstrucc均质化模型
Journal of Light Metals Pub Date : 2001-05-01 DOI: 10.1016/S1471-5317(01)00007-4
A. L. Dons
{"title":"The Alstruc homogenization model for industrial aluminum alloys","authors":"A. L. Dons","doi":"10.1016/S1471-5317(01)00007-4","DOIUrl":"https://doi.org/10.1016/S1471-5317(01)00007-4","url":null,"abstract":"","PeriodicalId":100798,"journal":{"name":"Journal of Light Metals","volume":"52 1","pages":"133-149"},"PeriodicalIF":0.0,"publicationDate":"2001-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77950840","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: 91
Full or partial replacement of Y by rare-earth and some other elements in the Al85Y8Ni5Co2 alloy Al85Y8Ni5Co2合金中稀土和某些其他元素对Y的完全或部分取代
Journal of Light Metals Pub Date : 2001-05-01 DOI: 10.1016/S1471-5317(01)00003-7
D.V Louzguine, A Inoue
{"title":"Full or partial replacement of Y by rare-earth and some other elements in the Al85Y8Ni5Co2 alloy","authors":"D.V Louzguine,&nbsp;A Inoue","doi":"10.1016/S1471-5317(01)00003-7","DOIUrl":"https://doi.org/10.1016/S1471-5317(01)00003-7","url":null,"abstract":"<div><p>The present paper aims to report the effect of partial or full replacement of Y in the Al<sub>85</sub>Y<sub>8</sub>Ni<sub>5</sub>Co<sub>2</sub><span><span> alloy by other rare-earth (RE) metals. Influence of small amount of Zr, Pd or Cu additions was also studied for comparison as these elements also have a negative heat of mixing<span> with Al. The studied alloys were produced by rapid solidification of the melt. Glass-forming ability, crystallization behaviour and stability of the supercooled liquid have been studied by X-ray diffraction (XRD) and </span></span>differential scanning calorimetry (DSC). It has been found that additions of RE metals have not caused critical changes of the properties of the Al</span><sub>85</sub>Y<sub>8</sub>Ni<sub>5</sub>Co<sub>2</sub> alloy while small amount of Pd or Cu additions significantly change its crystallization behaviour and destabilize the supercooled liquid. Addition of more than about 3 at.% of Zr causes precipitation of the primary Al<sub>3</sub>Zr phase during rapid solidification.</p></div>","PeriodicalId":100798,"journal":{"name":"Journal of Light Metals","volume":"1 2","pages":"Pages 105-109"},"PeriodicalIF":0.0,"publicationDate":"2001-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1471-5317(01)00003-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72111151","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: 26
Formation of defect bands in high pressure die cast magnesium alloys 高压压铸镁合金中缺陷带的形成
Journal of Light Metals Pub Date : 2001-05-01 DOI: 10.1016/S1471-5317(01)00002-5
A.K Dahle, S. Sannes, D.H St. John, H. Westengen
{"title":"Formation of defect bands in high pressure die cast magnesium alloys","authors":"A.K Dahle, S. Sannes, D.H St. John, H. Westengen","doi":"10.1016/S1471-5317(01)00002-5","DOIUrl":"https://doi.org/10.1016/S1471-5317(01)00002-5","url":null,"abstract":"","PeriodicalId":100798,"journal":{"name":"Journal of Light Metals","volume":"1 1","pages":"99-103"},"PeriodicalIF":0.0,"publicationDate":"2001-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87013778","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: 103
Hundred years of precipitation hardening 百年沉淀硬化
Journal of Light Metals Pub Date : 2001-05-01 DOI: 10.1016/S1471-5317(01)00006-2
E. Hornbogen
{"title":"Hundred years of precipitation hardening","authors":"E. Hornbogen","doi":"10.1016/S1471-5317(01)00006-2","DOIUrl":"https://doi.org/10.1016/S1471-5317(01)00006-2","url":null,"abstract":"","PeriodicalId":100798,"journal":{"name":"Journal of Light Metals","volume":"20 1","pages":"127-132"},"PeriodicalIF":0.0,"publicationDate":"2001-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79888359","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: 82
Full or partial replacement of Y by rare-earth and some other elements in the Al85Y8Ni5Co2 alloy 在Al85Y8Ni5Co2合金中，稀土和其他元素全部或部分取代Y
Journal of Light Metals Pub Date : 2001-05-01 DOI: 10.1016/S1471-5317(01)00003-7
D. Louzguine, A. Inoue
{"title":"Full or partial replacement of Y by rare-earth and some other elements in the Al85Y8Ni5Co2 alloy","authors":"D. Louzguine, A. Inoue","doi":"10.1016/S1471-5317(01)00003-7","DOIUrl":"https://doi.org/10.1016/S1471-5317(01)00003-7","url":null,"abstract":"","PeriodicalId":100798,"journal":{"name":"Journal of Light Metals","volume":"12 1","pages":"105-109"},"PeriodicalIF":0.0,"publicationDate":"2001-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74249266","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: 26
Hundred years of precipitation hardening 百年沉淀硬化
Journal of Light Metals Pub Date : 2001-05-01 DOI: 10.1016/S1471-5317(01)00006-2
Erhard Hornbogen
{"title":"Hundred years of precipitation hardening","authors":"Erhard Hornbogen","doi":"10.1016/S1471-5317(01)00006-2","DOIUrl":"https://doi.org/10.1016/S1471-5317(01)00006-2","url":null,"abstract":"<div><p>About 100 years ago, precipitation hardening was discovered and the first structural aluminum alloys with considerable strength were developed. Our present understanding of the phenomenon in based on the application of dislocation theory as well as reaction kinetics, especially the role of metastable phases and lattice defects in nucleation from supersaturated solids. The prerequisites for optimum precipitation hardening can be precisely defined. However, the progress in the development of new alloys has been slow in the recent years. The original alloy is still in use today.</p></div>","PeriodicalId":100798,"journal":{"name":"Journal of Light Metals","volume":"1 2","pages":"Pages 127-132"},"PeriodicalIF":0.0,"publicationDate":"2001-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1471-5317(01)00006-2","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72115705","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: 82
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