Pub Date : 1995-12-15DOI: 10.1016/0956-716X(95)00474-A
Guillermo Bozzolo , Carlos Amador , John Ferrante , Ronald D. Noebe
{"title":"Modelling of the defect structure of β-NiAl","authors":"Guillermo Bozzolo , Carlos Amador , John Ferrante , Ronald D. Noebe","doi":"10.1016/0956-716X(95)00474-A","DOIUrl":"10.1016/0956-716X(95)00474-A","url":null,"abstract":"","PeriodicalId":101150,"journal":{"name":"Scripta Metallurgica et Materialia","volume":"33 12","pages":"Pages 1907-1913"},"PeriodicalIF":0.0,"publicationDate":"1995-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0956-716X(95)00474-A","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78585794","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}
Pub Date : 1995-12-15DOI: 10.1016/0956-716X(95)00458-8
N.A. McMinn, X. Mao
{"title":"Toughening of TiAl composites by NiAl additions","authors":"N.A. McMinn, X. Mao","doi":"10.1016/0956-716X(95)00458-8","DOIUrl":"10.1016/0956-716X(95)00458-8","url":null,"abstract":"","PeriodicalId":101150,"journal":{"name":"Scripta Metallurgica et Materialia","volume":"33 12","pages":"Pages 1915-1919"},"PeriodicalIF":0.0,"publicationDate":"1995-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0956-716X(95)00458-8","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86302539","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}
Pub Date : 1995-12-15DOI: 10.1016/0956-716X(95)00439-3
Nam-Hoe Heo , Hu-Chul Lee
{"title":"Effect of tungsten addition on the ductile-brittle-ductile transition in Fe-8Mn-7Ni-W maraging steels","authors":"Nam-Hoe Heo , Hu-Chul Lee","doi":"10.1016/0956-716X(95)00439-3","DOIUrl":"10.1016/0956-716X(95)00439-3","url":null,"abstract":"","PeriodicalId":101150,"journal":{"name":"Scripta Metallurgica et Materialia","volume":"33 12","pages":"Pages 2031-2035"},"PeriodicalIF":0.0,"publicationDate":"1995-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0956-716X(95)00439-3","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73664646","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}
Pub Date : 1995-12-15DOI: 10.1016/0956-716X(95)00377-8
O.B. Nasello, C.l. Di Prinzio, B.J.Gonzalez Kreigel
It has been shown that the theoretical treatment developed by Di Prinzio et al. to study the grain boundary diffusivity in anisotropic material can be experimentally implemented.
The method was applied to ice bicrystalline samples. The results obtained show that the diffusivity of tilt boundaries 〈101̄0〉/21 ° and 〈101̄0〉/90 ° depends on the grain boundary inclination.
As a rule, the authors suggest that when Sun and Bauer's method is followed to study grain boundary migration b and F(α) may always be determined; it should be kept in mind that, neither values of the Mγ(β) function nor the mean value of Mγ were obtained; instead was found.
{"title":"An experimental method to study grain boundary diffusivity in anisotropic materials","authors":"O.B. Nasello, C.l. Di Prinzio, B.J.Gonzalez Kreigel","doi":"10.1016/0956-716X(95)00377-8","DOIUrl":"10.1016/0956-716X(95)00377-8","url":null,"abstract":"<div><p>It has been shown that the theoretical treatment developed by Di Prinzio et al. to study the grain boundary diffusivity in anisotropic material can be experimentally implemented.</p><p>The method was applied to ice bicrystalline samples. The results obtained show that the diffusivity of tilt boundaries 〈101&#x0304;0〉/21 ° and 〈101&#x0304;0〉/90 ° depends on the grain boundary inclination.</p><p>As a rule, the authors suggest that when Sun and Bauer's method is followed to study grain boundary migration <em>b</em> and <em>F</em>(<em>α</em>) may always be determined; it should be kept in mind that, neither values of the <em>Mγ</em>(<em>β</em>) function nor the mean value of <em>Mγ</em> were obtained; instead <span><math><mtext>Mγ</mtext><msub><mi></mi><mn>eff</mn></msub></math></span> was found.</p></div>","PeriodicalId":101150,"journal":{"name":"Scripta Metallurgica et Materialia","volume":"33 12","pages":"Pages 1889-1894"},"PeriodicalIF":0.0,"publicationDate":"1995-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0956-716X(95)00377-8","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81960039","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}
Pub Date : 1995-12-15DOI: 10.1016/0956-716X(95)00475-B
M.S. Chuang, G.C. Tu
A supersaturated Al alloy with 3.14 wt% of Cr, 4.03 wt% of Zr and 1.95 wt% of Nb, which gives rise to about 8 vol% of metastable L12-Al3(Zr0.67Nb0.33) precipitates after aging, was prepared by the melt spinning process. Spherical L12-structured precipitates with mean particle radius of 10Å form after aging. Slow volumetric coarsening rates of 5.73 × 10−30 (at 375 °C), 2.51x10−29 (at 400 °C), and 5.86 × 10−28 (at 450 °C) m3/hr are measured for the L12-structured Al3(Zr0.67Nb0.33) precipitates in the melt spun ribbon. From a modified LSW equation for volumetric coarsening, an interfacial energy of 0.013 J/m2 is calculated. This value agrees well with the reported values for a coherent interface. Most particle size distributions (PSDs) of precipitates under investigation also fit quite well to that predicted by MLSW theory. The above points, therefore, prove that Nb is really a useful candidate for addition into an Al-Cr-Zr high temperature Al alloy.
{"title":"The effect of Nb-addition on the L12 precipitates of rapidly-solidified Al-Cr-Zr alloy","authors":"M.S. Chuang, G.C. Tu","doi":"10.1016/0956-716X(95)00475-B","DOIUrl":"10.1016/0956-716X(95)00475-B","url":null,"abstract":"<div><p>A supersaturated Al alloy with 3.14 wt% of Cr, 4.03 wt% of Zr and 1.95 wt% of Nb, which gives rise to about 8 vol% of metastable L1<sub>2</sub>-Al<sub>3</sub>(Zr<sub>0.67</sub>Nb<sub>0.33</sub>) precipitates after aging, was prepared by the melt spinning process. Spherical L12-structured precipitates with mean particle radius of 10Å form after aging. Slow volumetric coarsening rates of 5.73 × 10<sup>−30</sup> (at 375 °C), 2.51x10<sup>−29</sup> (at 400 °C), and 5.86 × 10<sup>−28</sup> (at 450 °C) m<sup>3</sup>/hr are measured for the L12-structured Al<sub>3</sub>(Zr<sub>0.67</sub>Nb<sub>0.33</sub>) precipitates in the melt spun ribbon. From a modified LSW equation for volumetric coarsening, an interfacial energy of 0.013 J/m<sup>2</sup> is calculated. This value agrees well with the reported values for a coherent interface. Most particle size distributions (PSDs) of precipitates under investigation also fit quite well to that predicted by MLSW theory. The above points, therefore, prove that Nb is really a useful candidate for addition into an Al-Cr-Zr high temperature Al alloy.</p></div>","PeriodicalId":101150,"journal":{"name":"Scripta Metallurgica et Materialia","volume":"33 12","pages":"Pages 1999-2005"},"PeriodicalIF":0.0,"publicationDate":"1995-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0956-716X(95)00475-B","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79443810","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}
Pub Date : 1995-12-15DOI: 10.1016/0956-716X(95)00480-J
Y.Y. Qiu
{"title":"Efect of the Al and Mo on the γ′γ lattice mismatch and γ′ morphology in Ni-based superalloys","authors":"Y.Y. Qiu","doi":"10.1016/0956-716X(95)00480-J","DOIUrl":"10.1016/0956-716X(95)00480-J","url":null,"abstract":"","PeriodicalId":101150,"journal":{"name":"Scripta Metallurgica et Materialia","volume":"33 12","pages":"Pages 1961-1968"},"PeriodicalIF":0.0,"publicationDate":"1995-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0956-716X(95)00480-J","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74354423","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}
Pub Date : 1995-12-15DOI: 10.1016/0956-716X(95)00443-Y
I.W. Hall , F. Manrique
{"title":"Surface treatment of carbon fibers for aluminum alloy matrix composites","authors":"I.W. Hall , F. Manrique","doi":"10.1016/0956-716X(95)00443-Y","DOIUrl":"10.1016/0956-716X(95)00443-Y","url":null,"abstract":"","PeriodicalId":101150,"journal":{"name":"Scripta Metallurgica et Materialia","volume":"33 12","pages":"Pages 2037-2043"},"PeriodicalIF":0.0,"publicationDate":"1995-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0956-716X(95)00443-Y","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78978627","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}
Pub Date : 1995-12-15DOI: 10.1016/0956-716X(95)00453-3
K.K. Jee , S.H. Baik , B.J. Lee , M.C. Shin , C.S. Choi
{"title":"Measurement of volume fraction of stress-induced εs martensite in Fe-32Mn-6Si alloy","authors":"K.K. Jee , S.H. Baik , B.J. Lee , M.C. Shin , C.S. Choi","doi":"10.1016/0956-716X(95)00453-3","DOIUrl":"10.1016/0956-716X(95)00453-3","url":null,"abstract":"","PeriodicalId":101150,"journal":{"name":"Scripta Metallurgica et Materialia","volume":"33 12","pages":"Pages 1901-1905"},"PeriodicalIF":0.0,"publicationDate":"1995-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0956-716X(95)00453-3","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89086401","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}
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