发布求助
文献互助 智能选刊 最新文献

Metallography最新文献

筛选
英文 中文
Crystal morphology of massive eutectic silicon in unmodified Al-Si eutectic 未改性Al-Si共晶中块状共晶硅的晶体形貌
Metallography Pub Date : 1989-01-01 Epub Date: 2003-06-11 DOI: 10.1016/0026-0800(89)90020-7
M. Shamsuzzoha , L.M. Hogan
{"title":"Crystal morphology of massive eutectic silicon in unmodified Al-Si eutectic","authors":"M. Shamsuzzoha ,&nbsp;L.M. Hogan","doi":"10.1016/0026-0800(89)90020-7","DOIUrl":"10.1016/0026-0800(89)90020-7","url":null,"abstract":"<div><p>We describe crystallographic observations of the silicon phase in massive eutectic crystallization of an aluminum-silicon alloy, formed by very slow directional growth under a steep temperature gradient. The silicon particles examined were twinned, and their growth crystallography conformed with two distinct mechanisms of TPRE crystal growth. Thus, the TPRE growth mechanism can play a significant part in massive eutectic growth in this system, but it is not assumed to be essential.</p></div>","PeriodicalId":100918,"journal":{"name":"Metallography","volume":"22 1","pages":"Pages 37-45"},"PeriodicalIF":0.0,"publicationDate":"1989-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0026-0800(89)90020-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83014969","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
Characterization of M23C6 carbide precipitated at grain boundaries in a superalloy 高温合金中晶界析出M23C6碳化物的表征
Metallography Pub Date : 1989-01-01 Epub Date: 2003-06-11 DOI: 10.1016/0026-0800(89)90021-9
Rong Yong-Hua, Guo Yong-Xiang, Hu Geng Xiang
{"title":"Characterization of M23C6 carbide precipitated at grain boundaries in a superalloy","authors":"Rong Yong-Hua,&nbsp;Guo Yong-Xiang,&nbsp;Hu Geng Xiang","doi":"10.1016/0026-0800(89)90021-9","DOIUrl":"10.1016/0026-0800(89)90021-9","url":null,"abstract":"<div><p>Transmission electron microscopy studies were undertaken to characterize the formation, the imperfection, and the interfacial structure of grain boundary M<sub>23</sub>C<sub>6</sub> carbide in a Ni-base superalloy. The carbides are nucleated separately on both sides of the grain boundary. Each carbide particle possesses a coherent boundary on its matrix side and a high-angle boundary on the other side. The particle is composed of several subgrains, and antiphase boundaries are observed between the subgrain. Lattice defects, such as dislocations, stacking faults, and microtwins, are revealed in the M<sub>23</sub>C<sub>6</sub> carbides.</p></div>","PeriodicalId":100918,"journal":{"name":"Metallography","volume":"22 1","pages":"Pages 47-55"},"PeriodicalIF":0.0,"publicationDate":"1989-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0026-0800(89)90021-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83388276","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: 39
Morphology of rust phases formed on weathering steels in various laboratory corrosion tests 耐候钢在各种实验室腐蚀试验中形成的锈相形态
Metallography Pub Date : 1989-01-01 Epub Date: 2003-06-11 DOI: 10.1016/0026-0800(89)90024-4
A. Raman, S. Nasrazadani, L. Sharma
{"title":"Morphology of rust phases formed on weathering steels in various laboratory corrosion tests","authors":"A. Raman,&nbsp;S. Nasrazadani,&nbsp;L. Sharma","doi":"10.1016/0026-0800(89)90024-4","DOIUrl":"10.1016/0026-0800(89)90024-4","url":null,"abstract":"<div><p>The morphology and growth characteristics of rust phases formed on ASTM A-588 weathering steel in three different types of laboratory tests—accelerated atmospheric exposure simulation tests (AAEST), salt fog test, and continuous immersion test in plain as well as salt water—are analyzed using microstructural information obtained from representative exposed specimens studied in a scanning electron microscope (SEM). The ultimate and most dominant phase in the AAEST was α-FeOOH whereas an amorphous phase designated as amorphous bulk (AB) appeared as “cotton bolls” in the adherent, sedimentary layer formed on the steel surface during continuous immersion. Crystalline phases α-, δ-, and γ-FeOOH as well as γ-Fe<sub>2</sub>O<sub>3</sub>.H<sub>2</sub>O were found developed on top of the first-formed sedimentary amorphous layer, containing another amorphous phase designated as amorphous mix (AM). Magnetite was the dominant phase obtained in the salt fog test. It forms in layers and seems to transform to α-FeOOH through formation of whiskers and rods on its surface. Sandy grains of γ-Fe<sub>2</sub>O<sub>3</sub>.H<sub>2</sub>O were also seen in the rusts obtained in this test.</p></div>","PeriodicalId":100918,"journal":{"name":"Metallography","volume":"22 1","pages":"Pages 79-96"},"PeriodicalIF":0.0,"publicationDate":"1989-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0026-0800(89)90024-4","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87547381","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: 98
Microstructural aspects of low-pressure plasma-sprayed CoNiCrAlY coating on Hastelloy X 哈氏合金表面低压等离子喷涂CoNiCrAlY涂层的显微组织研究
Metallography Pub Date : 1989-01-01 Epub Date: 2003-06-11 DOI: 10.1016/0026-0800(89)90022-0
S.C. Tjong, G.E. Shih, N.J. Ho
{"title":"Microstructural aspects of low-pressure plasma-sprayed CoNiCrAlY coating on Hastelloy X","authors":"S.C. Tjong,&nbsp;G.E. Shih,&nbsp;N.J. Ho","doi":"10.1016/0026-0800(89)90022-0","DOIUrl":"10.1016/0026-0800(89)90022-0","url":null,"abstract":"<div><p>A Co-32Ni-21Cr-8Al-0.5Y alloy coating was plasma sprayed on Hastelloy X. The microstructure of the coating layer consists of γ phase solid solution, γ′ phase, and Y-rich intermetallic phase. This coating exhibits excellent oxidation and sulfidation resistance after exposure in air and in sodium sulfate at 1,000°C for 60 h, due to the formation of α-Al<sub>2</sub>O<sub>3</sub> oxide scale. However, the presence of chloride in the sodium sulfate leads to rupture of the aluminium oxide scale, and this results in the precipitation of chlorides and sulfides within the coating layer.</p></div>","PeriodicalId":100918,"journal":{"name":"Metallography","volume":"22 1","pages":"Pages 57-67"},"PeriodicalIF":0.0,"publicationDate":"1989-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0026-0800(89)90022-0","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86890306","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
Metallography of fatigue crack initiation in coarse-grained Astroloy at 20°C 20°C时粗晶星形合金疲劳裂纹萌生的金相学
Metallography Pub Date : 1989-01-01 Epub Date: 2003-06-11 DOI: 10.1016/0026-0800(89)90026-8
D.L. Davidson, J.B. Campbell
{"title":"Metallography of fatigue crack initiation in coarse-grained Astroloy at 20°C","authors":"D.L. Davidson,&nbsp;J.B. Campbell","doi":"10.1016/0026-0800(89)90026-8","DOIUrl":"10.1016/0026-0800(89)90026-8","url":null,"abstract":"<div><p>Fatigue crack initiation in coarse-grained Astroloy was studied by initiating cracks under bending loads. The specimen was not replicated in order to preserve any debris or extrusions associated with the cracks. Cracks were found to have initiated at pores and along slip lines. Debris and tonguelike extrusions were found coming from some cracks, but not all of them. Illustrations are given of the five different crack extrusion-related phenomena that were observed. It is concluded that the extrusion of material in the form of tonguelike or other debris may accompany the initiation of fatigue cracks, but that it is not a requisite part of the processes causing the crack.</p></div>","PeriodicalId":100918,"journal":{"name":"Metallography","volume":"22 1","pages":"Pages 107-115"},"PeriodicalIF":0.0,"publicationDate":"1989-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0026-0800(89)90026-8","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73064999","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
New methods of electro- and jet polishing palladium for transmission electron microscopy 透射电镜用钯的电喷抛光新方法
Metallography Pub Date : 1989-01-01 Epub Date: 2003-06-11 DOI: 10.1016/0026-0800(89)90027-X
M.J. Witcomb
{"title":"New methods of electro- and jet polishing palladium for transmission electron microscopy","authors":"M.J. Witcomb","doi":"10.1016/0026-0800(89)90027-X","DOIUrl":"10.1016/0026-0800(89)90027-X","url":null,"abstract":"","PeriodicalId":100918,"journal":{"name":"Metallography","volume":"22 1","pages":"Pages 117-120"},"PeriodicalIF":0.0,"publicationDate":"1989-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0026-0800(89)90027-X","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74411014","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
Estimation of the average size of plane convex loops in three dimensional microstructure 三维微结构中平面凸环平均尺寸的估计
Metallography Pub Date : 1989-01-01 Epub Date: 2003-06-11 DOI: 10.1016/0026-0800(89)90023-2
A.M. Gokhale
{"title":"Estimation of the average size of plane convex loops in three dimensional microstructure","authors":"A.M. Gokhale","doi":"10.1016/0026-0800(89)90023-2","DOIUrl":"10.1016/0026-0800(89)90023-2","url":null,"abstract":"<div><p>Evolution of microstructures leads to formation of lineal microstructural features, which can be often regarded as plane convex loops. Average loop size is an important stereological parameter for characterization of such features. It is shown that the perimeter averaged caliper diameter <span><math><mtext>D</mtext><msub><mi></mi><mn>p</mn></msub></math></span> is a quantitative descriptor of the average loop size. This parameter is related to the total perimeter of the loops per unit volume, L<sub><em>v</em></sub>, and the total planar area enclosed by the loops per unit volume, A<sub><em>v</em></sub>, as follows: <span><span><span><math><mtext>D</mtext><msub><mi></mi><mn>p</mn></msub><mtext>=</mtext><mtext>4A</mtext><msub><mi></mi><mn>v</mn></msub><mtext>L</mtext><msub><mi></mi><mn>v</mn></msub></math></span></span></span> A practical example involving experimental measurement of <span><math><mtext>D</mtext><msub><mi></mi><mn>p</mn></msub></math></span> is discussed.</p></div>","PeriodicalId":100918,"journal":{"name":"Metallography","volume":"22 1","pages":"Pages 69-77"},"PeriodicalIF":0.0,"publicationDate":"1989-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0026-0800(89)90023-2","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81500949","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
High-resolution measurement of crack-tip plastic zone sizes by selected area channelling patterns 高分辨率测量裂纹尖端塑料区大小选定区域通道模式
Metallography Pub Date : 1989-01-01 Epub Date: 2003-06-11 DOI: 10.1016/0026-0800(89)90018-9
A. Tekin, J.W. Martin
{"title":"High-resolution measurement of crack-tip plastic zone sizes by selected area channelling patterns","authors":"A. Tekin,&nbsp;J.W. Martin","doi":"10.1016/0026-0800(89)90018-9","DOIUrl":"10.1016/0026-0800(89)90018-9","url":null,"abstract":"<div><p>Selected area channelling patterns (SACPs) have been used to measure plastic zones (PZ) associated with fatigue cracks in a nickel-based superalloy MA6000. Refinement of the technique has enabled the PZ dimension to be measured to within ±0.5 μm, which represents an order of magnitude improvement on previously reported work.</p><p>It has been shown, in a series of fatigue tests at various frequencies and temperatures, that the size of the plastic zone at a given value of ΔK varies with the square root of the crack propagation rate.</p></div>","PeriodicalId":100918,"journal":{"name":"Metallography","volume":"22 1","pages":"Pages 1-14"},"PeriodicalIF":0.0,"publicationDate":"1989-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0026-0800(89)90018-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76038572","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: 19
Table of contents for Praktische Metallographie, 10/1988 《Praktische Metallographie》目录，1988年10月
Metallography Pub Date : 1989-01-01 Epub Date: 2003-06-11 DOI: 10.1016/0026-0800(89)90028-1
{"title":"Table of contents for Praktische Metallographie, 10/1988","authors":"","doi":"10.1016/0026-0800(89)90028-1","DOIUrl":"https://doi.org/10.1016/0026-0800(89)90028-1","url":null,"abstract":"","PeriodicalId":100918,"journal":{"name":"Metallography","volume":"22 1","pages":"Page 121"},"PeriodicalIF":0.0,"publicationDate":"1989-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0026-0800(89)90028-1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"137289609","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
Metallography of magnesium amalgams with peritectic microstructures 具有包晶组织的镁汞合金的金相学
Metallography Pub Date : 1989-01-01 Epub Date: 2003-06-11 DOI: 10.1016/0026-0800(89)90025-6
F.A. Calvo , M.P. Hierro
{"title":"Metallography of magnesium amalgams with peritectic microstructures","authors":"F.A. Calvo ,&nbsp;M.P. Hierro","doi":"10.1016/0026-0800(89)90025-6","DOIUrl":"10.1016/0026-0800(89)90025-6","url":null,"abstract":"<div><p>The microstructures of alloys that show peritectic formation of the compounds Mg<sub>3</sub>Hg and Mg<sub>5</sub>Hg<sub>2</sub> were studied after continuous cooling. Identification of phases present was performed by means of x-ray diffraction, microhardness tests, and differential thermal analysis.</p></div>","PeriodicalId":100918,"journal":{"name":"Metallography","volume":"22 1","pages":"Pages 97-105"},"PeriodicalIF":0.0,"publicationDate":"1989-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0026-0800(89)90025-6","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76717921","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
首页 上一页 下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：604180095
Book学术官方微信
小红书