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On an improved preparation method for Ni3Al specimens and its application to in situ straining in a transmission electron microscope 一种改进的Ni3Al试样制备方法及其在透射电镜原位应变中的应用
Metallography Pub Date : 1989-11-01 DOI: 10.1016/0026-0800(89)90031-1
R. Maurer, U. Salzberger
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引用次数: 0
A cryogenic fracture technique for characterizing zinc-coated steels 一种表征镀锌钢的低温断裂技术
Metallography Pub Date : 1989-11-01 DOI: 10.1016/0026-0800(89)90032-3
N.M. Giallourakis, D.K. Matlock, G. Krauss
{"title":"A cryogenic fracture technique for characterizing zinc-coated steels","authors":"N.M. Giallourakis, D.K. Matlock, G. Krauss","doi":"10.1016/0026-0800(89)90032-3","DOIUrl":"10.1016/0026-0800(89)90032-3","url":null,"abstract":"","PeriodicalId":100918,"journal":{"name":"Metallography","volume":"23 3","pages":"Pages 209-218"},"PeriodicalIF":0.0,"publicationDate":"1989-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0026-0800(89)90032-3","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76153987","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: 9
Author and title indexes for 1989 1989年作者和标题索引
Metallography Pub Date : 1989-11-01 DOI: 10.1016/0026-0800(89)90035-9
{"title":"Author and title indexes for 1989","authors":"","doi":"10.1016/0026-0800(89)90035-9","DOIUrl":"https://doi.org/10.1016/0026-0800(89)90035-9","url":null,"abstract":"","PeriodicalId":100918,"journal":{"name":"Metallography","volume":"23 3","pages":"Pages 241-243"},"PeriodicalIF":0.0,"publicationDate":"1989-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0026-0800(89)90035-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91699865","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
Morphology of weld heat-affected zone liquation cracking in Ta-modified cast Alloy 718 ta改性铸造718合金焊缝热影响区液化裂纹形貌
Metallography Pub Date : 1989-11-01 DOI: 10.1016/0026-0800(89)90033-5
S.L. West , W.A. Baeslack III , T.J. Kelly
{"title":"Morphology of weld heat-affected zone liquation cracking in Ta-modified cast Alloy 718","authors":"S.L. West , W.A. Baeslack III , T.J. Kelly","doi":"10.1016/0026-0800(89)90033-5","DOIUrl":"10.1016/0026-0800(89)90033-5","url":null,"abstract":"","PeriodicalId":100918,"journal":{"name":"Metallography","volume":"23 3","pages":"Pages 219-229"},"PeriodicalIF":0.0,"publicationDate":"1989-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0026-0800(89)90033-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88350818","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
Cell-area distributions of planar Voronoi mosaics 平面Voronoi马赛克的细胞面积分布
Metallography Pub Date : 1989-11-01 DOI: 10.1016/0026-0800(89)90030-X
H. Hermann , H. Wendrock , D. Stoyan
{"title":"Cell-area distributions of planar Voronoi mosaics","authors":"H. Hermann ,&nbsp;H. Wendrock ,&nbsp;D. Stoyan","doi":"10.1016/0026-0800(89)90030-X","DOIUrl":"10.1016/0026-0800(89)90030-X","url":null,"abstract":"<div><p>Poisson, hard-core, and cluster point fields are used to generate numerically planar Voronoi (Dirichlet) mosaics. Type and parameter values of the point fields are closely related to the parameters of the corresponding mosaic cell-area distribution. These relationships are described quantitatively by two-dimensional parameter diagrams. The properties of a given empirical mosaic can be clearly explained by estimating a parameter set of its cell-area distribution and placing it in the corresponding parameter diagram.</p></div>","PeriodicalId":100918,"journal":{"name":"Metallography","volume":"23 3","pages":"Pages 189-200"},"PeriodicalIF":0.0,"publicationDate":"1989-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0026-0800(89)90030-X","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87421721","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: 32
TEM studies of DO3 structure in Fe-30Mn-9Al-0.4C weld metal☆ Fe-30Mn-9Al-0.4C焊缝金属DO3组织的TEM研究
Metallography Pub Date : 1989-11-01 DOI: 10.1016/0026-0800(89)90034-7
C. Chou, Chien-Hsun Lee
{"title":"TEM studies of DO3 structure in Fe-30Mn-9Al-0.4C weld metal☆","authors":"C. Chou, Chien-Hsun Lee","doi":"10.1016/0026-0800(89)90034-7","DOIUrl":"https://doi.org/10.1016/0026-0800(89)90034-7","url":null,"abstract":"","PeriodicalId":100918,"journal":{"name":"Metallography","volume":"6 1","pages":"231-240"},"PeriodicalIF":0.0,"publicationDate":"1989-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82948781","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
TEM studies of DO3 structure in Fe-30Mn-9Al-0.4C weld metal Fe-30Mn-9Al-0.4C焊缝金属DO3组织的TEM研究
Metallography Pub Date : 1989-11-01 DOI: 10.1016/0026-0800(89)90034-7
Chang-Pin Chou, Chien-Hsun Lee
{"title":"TEM studies of DO3 structure in Fe-30Mn-9Al-0.4C weld metal","authors":"Chang-Pin Chou,&nbsp;Chien-Hsun Lee","doi":"10.1016/0026-0800(89)90034-7","DOIUrl":"https://doi.org/10.1016/0026-0800(89)90034-7","url":null,"abstract":"<div><p>The microstructure of weld metal of duplex Fe-30Mn-9Al-0.4C alloy was investigated using optical metallography and transmission electron microscopy. It was found that DO<sub>3</sub> superlattices having an ordered FCC structure precipitated in the ferrite phase during autogenous gas tungsten arc welding. Two types of antiphase boundary were observed between precipitates in the Fe-Mn-Al weld metal.</p></div>","PeriodicalId":100918,"journal":{"name":"Metallography","volume":"23 3","pages":"Pages 231-240"},"PeriodicalIF":0.0,"publicationDate":"1989-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0026-0800(89)90034-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91774920","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
Determining true pearlite lamellar spacings from observed apparent spacings 根据观察到的表观间距测定真实珠光体片层间距
Metallography Pub Date : 1989-11-01 DOI: 10.1016/0026-0800(89)90029-3
H.S. Fong
{"title":"Determining true pearlite lamellar spacings from observed apparent spacings","authors":"H.S. Fong","doi":"10.1016/0026-0800(89)90029-3","DOIUrl":"10.1016/0026-0800(89)90029-3","url":null,"abstract":"<div><p>The method of Roosz, Gacsi, and Baan for determining true pearlite lamellar spacings from the apparent spacing frequencies observed on a metallographic surface is examined. It is shown that the method as it stands does not give very accurate results. Modifications to the method are proposed, and these are shown to lead to large improvements in the accuracy of the method.</p></div>","PeriodicalId":100918,"journal":{"name":"Metallography","volume":"23 3","pages":"Pages 173-188"},"PeriodicalIF":0.0,"publicationDate":"1989-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0026-0800(89)90029-3","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81961070","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
Metallographic contributions to understanding mechanisms of environmentally assisted cracking 金相学有助于理解环境辅助开裂机制
Metallography Pub Date : 1989-09-01 DOI: 10.1016/0026-0800(89)90016-5
S.P. Lynch
{"title":"Metallographic contributions to understanding mechanisms of environmentally assisted cracking","authors":"S.P. Lynch","doi":"10.1016/0026-0800(89)90016-5","DOIUrl":"10.1016/0026-0800(89)90016-5","url":null,"abstract":"<div><p>Mechanisms of environmentally assisted cracking can often be deduced from a knowledge of the relationship between cracking and microstructure, the fracture planes and directions, the detailed appearance of fracture-surfaces, the slip planes that are active during cracking, and the strains associated with crack growth. Metallographic and fractographic techniques for determining these characteristics are briefly reviewed, and the advantages of studying cracking in single crystals are outlined. Transcrystalline, cleavage-like cracking in various materials is then discussed, and it is concluded that the metallographic observations strongly support the following: 1) a mechanism of hydrogen embrittlement based on repeated formation and fracture of brittle hydrides for materials such as niobium, vanadium, and zirconium; and 2) a mechanism of liquid-metal embrittlement, hydrogen embrittlement, and stress-corrosion cracking, based on an adsorption-induced localized-slip process for materials such as aluminium alloys, nickel, and high-strength steels. There is, however, less support for other proposed mechanisms of transcrystalline stress-corrosion cracking, such as those based on film-induced cleavage or localized dissolution at crack tips, and the mechanism of cleavage-like cracking in some materials such as copper alloys is still unresolved.</p></div>","PeriodicalId":100918,"journal":{"name":"Metallography","volume":"23 2","pages":"Pages 147-171"},"PeriodicalIF":0.0,"publicationDate":"1989-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0026-0800(89)90016-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82366484","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: 79
On the development of a metallographic method to determine the strain distribution ahead of a crack tip 建立一种测定裂纹尖端前应变分布的金相方法
Metallography Pub Date : 1989-09-01 DOI: 10.1016/0026-0800(89)90013-X
L.G. Luo , A. Ryks , J.D. Embury
{"title":"On the development of a metallographic method to determine the strain distribution ahead of a crack tip","authors":"L.G. Luo ,&nbsp;A. Ryks ,&nbsp;J.D. Embury","doi":"10.1016/0026-0800(89)90013-X","DOIUrl":"10.1016/0026-0800(89)90013-X","url":null,"abstract":"<div><p>A metallographic method was used to determine the strain distribution ahead of a blunted crack tip under plane strain (midsection) and plane stress (surface) conditions as well as an advancing sharp crack tip under plane stress conditions. The material used was an HSLA steel in two treatments: after controlled rolling, which produced a fine-grained structure with grains 8 μm in diameter; and in a condition that thermally simulated a heat-affected zone structure (a coarse-grain size, 33 μm in diameter).</p><p>The strain distribution ahead of a blunted crack tip can be expressed as <span><math><mtext>ϵ = 0.14 (</mtext><mtext>(X</mtext><mtext>CTOD</mtext><mtext>)</mtext><msup><mi></mi><mn>(−0.64)</mn></msup></math></span> where <em>X</em> is the distance from the moving crack tip, and CTOD is the Crack Tip Opening Displacement, for the steel tested under both plane strain and plane stress conditions.</p><p>It was determined that the strain distribution ahead of an advancing sharp crack tip can be expressed by <em>ϵ</em> = 0.75exp(−38<em>X</em>).</p></div>","PeriodicalId":100918,"journal":{"name":"Metallography","volume":"23 2","pages":"Pages 101-117"},"PeriodicalIF":0.0,"publicationDate":"1989-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0026-0800(89)90013-X","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78876862","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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