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Hot and warm forming of 2618 aluminium alloy 2618铝合金的热成形和温成形
Journal of Light Metals Pub Date : 2002-11-01 DOI: 10.1016/S1471-5317(03)00008-7
P. Cavaliere
{"title":"Hot and warm forming of 2618 aluminium alloy","authors":"P. Cavaliere","doi":"10.1016/S1471-5317(03)00008-7","DOIUrl":"https://doi.org/10.1016/S1471-5317(03)00008-7","url":null,"abstract":"","PeriodicalId":100798,"journal":{"name":"Journal of Light Metals","volume":"42 1","pages":"247-252"},"PeriodicalIF":0.0,"publicationDate":"2002-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75789357","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: 47
Hot and warm forming of 2618 aluminium alloy 2618铝合金的热压成形
Journal of Light Metals Pub Date : 2002-11-01 DOI: 10.1016/S1471-5317(03)00008-7
P Cavaliere
{"title":"Hot and warm forming of 2618 aluminium alloy","authors":"P Cavaliere","doi":"10.1016/S1471-5317(03)00008-7","DOIUrl":"https://doi.org/10.1016/S1471-5317(03)00008-7","url":null,"abstract":"<div><p>The hot and warm formability of 2618 aluminium alloy, in the as-solutioned condition, was investigated in extended ranges of temperature and strain rate by means of torsion testing. Precipitation was found to occur during deformation. The effect of the precipitation of second phase particles, occurring during deformation, on the flow curve shape and on the stress level was evaluated. At the lowest temperatures, precipitation, during deformation, resulted in a continuous increase of flow stress; by contrast, when testing temperature exceeded 250 °C, precipitation and subsequent coarsening of precipitates, during deformation, resulted in a peak of flow curves, followed by softening. The constitutive equations of the material were calculated and the ductility of the alloy was evaluated as strain to fracture values in all the tested condition.</p></div>","PeriodicalId":100798,"journal":{"name":"Journal of Light Metals","volume":"2 4","pages":"Pages 247-252"},"PeriodicalIF":0.0,"publicationDate":"2002-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1471-5317(03)00008-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72112958","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: 47
An experimental investigation on the assimilation and recovery of strontium–magnesium alloys in A356 melts 锶镁合金在A356熔体中同化和回收的实验研究
Journal of Light Metals Pub Date : 2002-11-01 DOI: 10.1016/S1471-5317(03)00009-9
Stavros A Argyropoulos, Gordon L.S Chow
{"title":"An experimental investigation on the assimilation and recovery of strontium–magnesium alloys in A356 melts","authors":"Stavros A Argyropoulos,&nbsp;Gordon L.S Chow","doi":"10.1016/S1471-5317(03)00009-9","DOIUrl":"https://doi.org/10.1016/S1471-5317(03)00009-9","url":null,"abstract":"<div><p>The assimilation of cylindrical specimens, manufactured with various proportions of strontium<span>, magnesium, and aluminum, into A356 aluminum alloy melts was investigated. These cylindrical specimens were made as Sr–Mg binary alloys and subsequently as Sr–Mg–Al ternary alloys. Experimental details on the making of these cylinders are presented. A unique melting and casting apparatus was build to melt, mix and cast the reactive metals: strontium and magnesium.</span></p><p>Among the various Sr–Mg and Sr–Mg–Al alloys examined the ternary ones, namely 50/25/25 Sr/Mg/Al and 60/20/20 Sr/Mg/Al, exhibited the highest recoveries in the liquid A356 aluminum alloy. In both alloys these high recoveries were observed at 725 °C. The estimated recoveries at this temperature are comparable to that of pure strontium modifier.</p></div>","PeriodicalId":100798,"journal":{"name":"Journal of Light Metals","volume":"2 4","pages":"Pages 253-262"},"PeriodicalIF":0.0,"publicationDate":"2002-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1471-5317(03)00009-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72112959","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: 5
Effects of lubricants and compacting pressure on the processability and properties of aluminum P/M parts 润滑剂和压实压力对铝粉末冶金零件加工性能的影响
Journal of Light Metals Pub Date : 2002-11-01 DOI: 10.1016/S1471-5317(03)00007-5
L.-P. Lefebvre , Y. Thomas , B. White
{"title":"Effects of lubricants and compacting pressure on the processability and properties of aluminum P/M parts","authors":"L.-P. Lefebvre ,&nbsp;Y. Thomas ,&nbsp;B. White","doi":"10.1016/S1471-5317(03)00007-5","DOIUrl":"https://doi.org/10.1016/S1471-5317(03)00007-5","url":null,"abstract":"<div><p>Lubricants are generally admixed to metal powders to ease compaction and minimize the interaction between the tooling and the compact during ejection. The type and concentration of the lubricant have a significant impact on the processability and the characteristics of the material. While extensive work has been performed with iron-based mixes, relatively few studies have been published on the effects of lubricants and shaping conditions on the processing behavior and characteristics of aluminum (Al) components fabricated by powder metallurgy (P/M).</p><p>This paper presents the effects of the lubricant type (ethylene bisstearamide vs. polyethylene<span> wax), the lubricant concentration (0.7–1.5 wt.%), as well as the compacting pressure (138–413 MPa) on the powder characteristics and the properties of press and sintered 2xxx series aluminum alloy specimens (AMB-2712). Compaction and ejection characteristics, surface finish, green density and strength, dimensional change during sintering, sintered density and mechanical properties are presented and discussed.</span></p></div>","PeriodicalId":100798,"journal":{"name":"Journal of Light Metals","volume":"2 4","pages":"Pages 239-246"},"PeriodicalIF":0.0,"publicationDate":"2002-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1471-5317(03)00007-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72115493","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
Microstructure and mechanical properties of squeeze cast and semi-solid cast Mg–Al alloys 挤压铸造和半固态铸造Mg-Al合金的组织和力学性能
Journal of Light Metals Pub Date : 2002-11-01 DOI: 10.1016/S1471-5317(03)00012-9
S. Kleiner, O. Beffort, A. Wahlen, P. Uggowitzer
{"title":"Microstructure and mechanical properties of squeeze cast and semi-solid cast Mg–Al alloys","authors":"S. Kleiner, O. Beffort, A. Wahlen, P. Uggowitzer","doi":"10.1016/S1471-5317(03)00012-9","DOIUrl":"https://doi.org/10.1016/S1471-5317(03)00012-9","url":null,"abstract":"","PeriodicalId":100798,"journal":{"name":"Journal of Light Metals","volume":"11 1","pages":"277-280"},"PeriodicalIF":0.0,"publicationDate":"2002-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83596011","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: 135
Mechanical behavior and microstructure characterization of sinter-forged SiC particle reinforced aluminum matrix composites 烧结锻造SiC颗粒增强铝基复合材料的力学性能和显微组织表征
Journal of Light Metals Pub Date : 2002-11-01 DOI: 10.1016/S1471-5317(03)00005-1
N. Chawla, Jason J. Williams, R. Saha
{"title":"Mechanical behavior and microstructure characterization of sinter-forged SiC particle reinforced aluminum matrix composites","authors":"N. Chawla, Jason J. Williams, R. Saha","doi":"10.1016/S1471-5317(03)00005-1","DOIUrl":"https://doi.org/10.1016/S1471-5317(03)00005-1","url":null,"abstract":"","PeriodicalId":100798,"journal":{"name":"Journal of Light Metals","volume":"22 1","pages":"215-227"},"PeriodicalIF":0.0,"publicationDate":"2002-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84251276","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: 84
Solid state sintering and consolidation of Al powders and Al matrix composites Al粉末和Al基复合材料的固态烧结与固结
Journal of Light Metals Pub Date : 2002-11-01 DOI: 10.1016/S1471-5317(03)00004-X
F Tang, I.E Anderson, S.B Biner
{"title":"Solid state sintering and consolidation of Al powders and Al matrix composites","authors":"F Tang,&nbsp;I.E Anderson,&nbsp;S.B Biner","doi":"10.1016/S1471-5317(03)00004-X","DOIUrl":"https://doi.org/10.1016/S1471-5317(03)00004-X","url":null,"abstract":"<div><p><span><span><span>As an attempt to depart from conventional transient liquid phase sintering<span> practice, solid state vacuum sintering was studied in loose powder and in hot quasi-isostatically forged samples composed of commercial inert gas atomized (CIGA) or high purity Al powder. The high purity Al powder was generated by a gas </span></span>atomization </span>reaction synthesis (GARS) technique that results in spherical powder with a far thinner </span>surface oxide<span>. After vacuum sintering at 525 °C for up to 100 h, SEM results showed that the GARS Al powder achieved significantly advanced sintering stages, compared to the CIGA Al powder. Tensile results from the forged samples also showed that although its ultimate tensile strength is lower, 95 vs. 147 MPa, the ductility of the GARS pure Al sample is higher than the CIGA Al sample. Forging also consolidated a model powder-based composite system composed of an Al matrix reinforced with quasi-crystalline Al–Cu–Fe powders, where the same powder synthesis<span> methods were compared. Auger surface analysis detected evidence of increased matrix/reinforcement interfacial bonding in the composite sample made from GARS powder by alloy interdiffusion layer measurements, consistent with earlier tensile property measurements. The overall results indicated the significant potential of using Al powders produced with a thin, high purity surface oxide for simplifying current Al powder consolidation processing methods.</span></span></p></div>","PeriodicalId":100798,"journal":{"name":"Journal of Light Metals","volume":"2 4","pages":"Pages 201-214"},"PeriodicalIF":0.0,"publicationDate":"2002-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1471-5317(03)00004-X","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72112010","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: 52
Microstructure and mechanical properties of squeeze cast and semi-solid cast Mg–Al alloys 挤压铸造和半固态铸造镁铝合金的组织与力学性能
Journal of Light Metals Pub Date : 2002-11-01 DOI: 10.1016/S1471-5317(03)00012-9
S Kleiner , O Beffort , A Wahlen , P.J Uggowitzer
{"title":"Microstructure and mechanical properties of squeeze cast and semi-solid cast Mg–Al alloys","authors":"S Kleiner ,&nbsp;O Beffort ,&nbsp;A Wahlen ,&nbsp;P.J Uggowitzer","doi":"10.1016/S1471-5317(03)00012-9","DOIUrl":"https://doi.org/10.1016/S1471-5317(03)00012-9","url":null,"abstract":"<div><p><span>Magnesium–aluminium castings produced by means of squeeze casting, new rheocasting and thixocasting have been investigated. These casting processes provide very different microstructures consisting of α-Mg and β-Mg</span><sub>17</sub>Al<sub>12</sub>. The shape and distribution of the brittle β-Mg<sub>17</sub>Al<sub>12</sub> has a large influence on mechanical properties. Isolated particles of β-phase in squeeze cast components are less detrimental to ductility than the continuous β-phase network found in semi-solid processed parts. A heat treatment results in complete dissolution of β-Mg<sub>17</sub>Al<sub>12</sub><span> and accounts for significant improvements of ductility and fracture toughness. Crack propagation in solution heat treated Mg–Al castings is associated with extensive twinning.</span></p></div>","PeriodicalId":100798,"journal":{"name":"Journal of Light Metals","volume":"2 4","pages":"Pages 277-280"},"PeriodicalIF":0.0,"publicationDate":"2002-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1471-5317(03)00012-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72112012","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: 134
On the silicon spheroidization in Al-Si alloys 铝硅合金中硅球化的研究
Journal of Light Metals Pub Date : 2002-11-01 DOI: 10.1016/S1471-5317(03)00010-5
E. Ogris, A. Wahlen, H. Lüchinger, P. Uggowitzer
{"title":"On the silicon spheroidization in Al-Si alloys","authors":"E. Ogris, A. Wahlen, H. Lüchinger, P. Uggowitzer","doi":"10.1016/S1471-5317(03)00010-5","DOIUrl":"https://doi.org/10.1016/S1471-5317(03)00010-5","url":null,"abstract":"","PeriodicalId":100798,"journal":{"name":"Journal of Light Metals","volume":"58 1","pages":"263-269"},"PeriodicalIF":0.0,"publicationDate":"2002-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80506037","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: 205
Solid state sintering and consolidation of Al powders and Al matrix composites Al粉末及Al基复合材料的固态烧结与固结
Journal of Light Metals Pub Date : 2002-11-01 DOI: 10.1016/S1471-5317(03)00004-X
F. Tang, I. Anderson, S. Biner
{"title":"Solid state sintering and consolidation of Al powders and Al matrix composites","authors":"F. Tang, I. Anderson, S. Biner","doi":"10.1016/S1471-5317(03)00004-X","DOIUrl":"https://doi.org/10.1016/S1471-5317(03)00004-X","url":null,"abstract":"","PeriodicalId":100798,"journal":{"name":"Journal of Light Metals","volume":"1 1","pages":"201-214"},"PeriodicalIF":0.0,"publicationDate":"2002-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82375471","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: 52
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