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Effect of key alloying elements on the feeding characteristics of aluminum–silicon casting alloys 关键合金元素对铝硅铸造合金进给特性的影响
Journal of Light Metals Pub Date : 2001-11-01 Epub Date: 2002-03-20 DOI: 10.1016/S1471-5317(02)00002-0
Manas Dash, Makhlouf Makhlouf
{"title":"Effect of key alloying elements on the feeding characteristics of aluminum–silicon casting alloys","authors":"Manas Dash,&nbsp;Makhlouf Makhlouf","doi":"10.1016/S1471-5317(02)00002-0","DOIUrl":"https://doi.org/10.1016/S1471-5317(02)00002-0","url":null,"abstract":"<div><p>The most common and serious defect in aluminum castings is porosity, which is a result of two phenomena, insufficient feeding and/or hydrogen precipitation during solidification. These defects cause costly scrap loss and limit the use of castings in critical, high-strength applications. In this paper, the effect of alloying elements Si, Fe, Mg, Mn, Cu, Sr, and Ti as well as the cooling rate on the amount of porosity retained in aluminum castings has been quantified. The density of samples taken from locations along the length of a plate cast in sand is measured using Archimedes' principle following <em>ASTM</em><span> procedures. Hot isostatically pressed samples are used to determine the theoretical density of each of the alloys. The percent porosity is calculated from the difference between theoretical and measured density. The relative contribution of each of the alloying elements to porosity formation is calculated using analysis of variance. Scanning electron microscopy of some samples is performed to correlate the results obtained from analysis of variance to the intermetallics formed. It is observed that the morphology of the intermetallics greatly affects feedability of the alloy.</span></p></div>","PeriodicalId":100798,"journal":{"name":"Journal of Light Metals","volume":"1 4","pages":"Pages 251-265"},"PeriodicalIF":0.0,"publicationDate":"2001-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1471-5317(02)00002-0","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72110108","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: 72
The aluminum–silicon eutectic reaction: mechanisms and crystallography 铝硅共晶反应：机理与晶体学
Journal of Light Metals Pub Date : 2001-11-01 Epub Date: 2002-03-15 DOI: 10.1016/S1471-5317(02)00003-2
M.M. Makhlouf, H.V. Guthy
{"title":"The aluminum–silicon eutectic reaction: mechanisms and crystallography","authors":"M.M. Makhlouf,&nbsp;H.V. Guthy","doi":"10.1016/S1471-5317(02)00003-2","DOIUrl":"https://doi.org/10.1016/S1471-5317(02)00003-2","url":null,"abstract":"<div><p>The evolution of the contemporary theory for the formation and chemical modification of the aluminum–silicon eutectic is reviewed. The work of Hellawell et al., which laid the foundation for the present day understanding of this technologically important reaction, is critically examined and certain inconsistencies are shown to exist between the contemporary theory and more current concepts.</p></div>","PeriodicalId":100798,"journal":{"name":"Journal of Light Metals","volume":"1 4","pages":"Pages 199-218"},"PeriodicalIF":0.0,"publicationDate":"2001-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1471-5317(02)00003-2","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72122748","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: 218
Solid solution strengthening in concentrated Mg–Al alloys 高浓度Mg-Al合金的固溶强化
Journal of Light Metals Pub Date : 2001-08-01 DOI: 10.1016/S1471-5317(01)00008-6
C. H. Cáceres, D. Rovera
{"title":"Solid solution strengthening in concentrated Mg–Al alloys","authors":"C. H. Cáceres, D. Rovera","doi":"10.1016/S1471-5317(01)00008-6","DOIUrl":"https://doi.org/10.1016/S1471-5317(01)00008-6","url":null,"abstract":"","PeriodicalId":100798,"journal":{"name":"Journal of Light Metals","volume":"54 1","pages":"151-156"},"PeriodicalIF":0.0,"publicationDate":"2001-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75814917","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: 183
Corrosion fatigue of die-cast and extruded magnesium alloys 压铸和挤压镁合金的腐蚀疲劳
Journal of Light Metals Pub Date : 2001-08-01 Epub Date: 2001-11-27 DOI: 10.1016/S1471-5317(01)00011-6
A Eliezer, E.M Gutman, E Abramov, Ya Unigovski
{"title":"Corrosion fatigue of die-cast and extruded magnesium alloys","authors":"A Eliezer,&nbsp;E.M Gutman,&nbsp;E Abramov,&nbsp;Ya Unigovski","doi":"10.1016/S1471-5317(01)00011-6","DOIUrl":"https://doi.org/10.1016/S1471-5317(01)00011-6","url":null,"abstract":"<div><p>To study the fatigue life<span> of die-cast and extruded AZ91D, AM50 and AZ31 magnesium alloys, corrosion fatigue tests were carried out using a rotating beam type fatigue machine. Corrosive environment (3.5% NaCl) significantly decreases fatigue life of alloys, especially for extruded alloys. The fatigue data at high stresses were analyzed using fitting equations. Extruded alloys show a higher sensitivity to the action of NaCl solution in comparison with die-cast alloys; however, their corrosion fatigue life is longer than that of die-cast alloys. Corrosion fatigue behavior of Mg alloys correlates with their mechanochemical behavior. The latter was studied by the polarization measurements of the dissolution rate of strained alloys. TEM observations confirmed that the maximums on the curves of Mg dissolution rate dependence on the strain in NaCl solution appeared at the work-hardening stages due to the creation and destruction of dislocation pile-ups.</span></p></div>","PeriodicalId":100798,"journal":{"name":"Journal of Light Metals","volume":"1 3","pages":"Pages 179-186"},"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)00011-6","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72106265","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: 66
A practical method for identifying intermetallic phase particles in aluminium alloys by electron probe microanalysis 用电子探针显微分析识别铝合金中金属间相颗粒的实用方法
Journal of Light Metals Pub Date : 2001-08-01 Epub Date: 2001-11-27 DOI: 10.1016/S1471-5317(01)00012-8
Ma Qian , J.A Taylor , J.Y Yao , M.J Couper , D.H StJohn
{"title":"A practical method for identifying intermetallic phase particles in aluminium alloys by electron probe microanalysis","authors":"Ma Qian ,&nbsp;J.A Taylor ,&nbsp;J.Y Yao ,&nbsp;M.J Couper ,&nbsp;D.H StJohn","doi":"10.1016/S1471-5317(01)00012-8","DOIUrl":"https://doi.org/10.1016/S1471-5317(01)00012-8","url":null,"abstract":"<div><p>Aluminium alloys that contain Si, Mg, Fe, Mn and/or Cu usually contain one or more types of intermetallic phases that are not readily distinguishable in the microstructure by conventional microscopy methods. It has thus been a challenge to develop a method that will unambiguously identify them. A practical approach has been developed that is based on an inherent linear relationship revealed for the overall distribution of any two elements in a precipitate/matrix geometry and the first-order approximation of electron probe microanalysis (EPMA) results. Application of this approach to a direct chill cast 6082 alloy is demonstrated, and its major limitations are discussed.</p></div>","PeriodicalId":100798,"journal":{"name":"Journal of Light Metals","volume":"1 3","pages":"Pages 187-193"},"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)00012-8","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72106259","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: 17
Solid solution strengthening in concentrated Mg–Al alloys 浓Mg–Al合金的固溶强化
Journal of Light Metals Pub Date : 2001-08-01 Epub Date: 2001-10-15 DOI: 10.1016/S1471-5317(01)00008-6
C.H Cáceres, D.M Rovera
{"title":"Solid solution strengthening in concentrated Mg–Al alloys","authors":"C.H Cáceres,&nbsp;D.M Rovera","doi":"10.1016/S1471-5317(01)00008-6","DOIUrl":"https://doi.org/10.1016/S1471-5317(01)00008-6","url":null,"abstract":"<div><p>Solid solution effects on the hardness and flow stress have been studied in alloys with Al contents between 1 and 8 wt%. The hardness increases with the Al content as <em>H</em><sub>v10</sub> <span><math><mtext>(</mtext><mtext>kg</mtext><mspace></mspace><mtext>mm</mtext><msup><mi></mi><mn>−2</mn></msup><mtext>)=29+3</mtext><mspace></mspace><mtext>Al</mtext></math></span> (wt%). After correcting for grain size strengthening effects, the (0.2%) proof strength increases linearly with <em>c</em><sup><em>n</em></sup>, where <em>c</em> is the solute atom concentration and <em>n</em>=1/2∼2/3. The results suggest that strengthening of the basal plane controls the solid solution strengthening in polycrystals of concentrated Mg–Al alloys.</p></div>","PeriodicalId":100798,"journal":{"name":"Journal of Light Metals","volume":"1 3","pages":"Pages 151-156"},"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)00008-6","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72106268","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: 183
Influence of deformation conditions and texture on the high temperature flow stress of magnesium AZ31 变形条件和织构对AZ31镁合金高温流变应力的影响
Journal of Light Metals Pub Date : 2001-08-01 DOI: 10.1016/S1471-5317(01)00010-4
M. Barnett
{"title":"Influence of deformation conditions and texture on the high temperature flow stress of magnesium AZ31","authors":"M. Barnett","doi":"10.1016/S1471-5317(01)00010-4","DOIUrl":"https://doi.org/10.1016/S1471-5317(01)00010-4","url":null,"abstract":"","PeriodicalId":100798,"journal":{"name":"Journal of Light Metals","volume":"15 1","pages":"167-177"},"PeriodicalIF":0.0,"publicationDate":"2001-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83452801","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: 218
Corrosion fatigue of die-cast and extruded magnesium alloys 压铸和挤压镁合金的腐蚀疲劳
Journal of Light Metals Pub Date : 2001-08-01 DOI: 10.1016/S1471-5317(01)00011-6
A. Eliezer, E. Gutman, E. Abramov, Y. Unigovski
{"title":"Corrosion fatigue of die-cast and extruded magnesium alloys","authors":"A. Eliezer, E. Gutman, E. Abramov, Y. Unigovski","doi":"10.1016/S1471-5317(01)00011-6","DOIUrl":"https://doi.org/10.1016/S1471-5317(01)00011-6","url":null,"abstract":"","PeriodicalId":100798,"journal":{"name":"Journal of Light Metals","volume":"8 1","pages":"179-186"},"PeriodicalIF":0.0,"publicationDate":"2001-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74477376","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: 66
A practical method for identifying intermetallic phase particles in aluminium alloys by electron probe microanalysis 电子探针显微分析鉴定铝合金中金属间相颗粒的实用方法
Journal of Light Metals Pub Date : 2001-08-01 DOI: 10.1016/S1471-5317(01)00012-8
M. Qian, John A. Taylor, J. Yao, M. Couper, D. StJohn
{"title":"A practical method for identifying intermetallic phase particles in aluminium alloys by electron probe microanalysis","authors":"M. Qian, John A. Taylor, J. Yao, M. Couper, D. StJohn","doi":"10.1016/S1471-5317(01)00012-8","DOIUrl":"https://doi.org/10.1016/S1471-5317(01)00012-8","url":null,"abstract":"","PeriodicalId":100798,"journal":{"name":"Journal of Light Metals","volume":"19 1","pages":"187-193"},"PeriodicalIF":0.0,"publicationDate":"2001-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87169303","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: 17
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
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