Pub Date : 1989-12-01DOI: 10.1016/0036-9748(89)90225-1
Glyn Meyrick
In research on high temperature, low stress, creep in aluminum, Lacombe and Beaujard's etchant has been used to determine dislocation densities. This work has led to the suggestions that the density is about 108 m−2 or less and independent of stress and that for Harper-Dorn creep the density must be below a critical value of about 2×109 m−2. Here, the characteristics of the etchant have been reviewed and it has been shown that they are complex and that pit densities are generally unreliable measures of dislocation populations. The purpose of this note is to point this out and to suggest that further work on dislocation populations during Harper-Dorn creep is warranted.
{"title":"On the dislocation density in aluminum during Harper-Dorn creep","authors":"Glyn Meyrick","doi":"10.1016/0036-9748(89)90225-1","DOIUrl":"10.1016/0036-9748(89)90225-1","url":null,"abstract":"<div><p>In research on high temperature, low stress, creep in aluminum, Lacombe and Beaujard's etchant has been used to determine dislocation densities. This work has led to the suggestions that the density is about 10<sup>8</sup> m<sup>−2</sup> or less and independent of stress and that for Harper-Dorn creep the density must be below a critical value of about 2×10<sup>9</sup> m<sup>−2</sup>. Here, the characteristics of the etchant have been reviewed and it has been shown that they are complex and that pit densities are generally unreliable measures of dislocation populations. The purpose of this note is to point this out and to suggest that further work on dislocation populations during Harper-Dorn creep is warranted.</p></div>","PeriodicalId":21604,"journal":{"name":"Scripta Metallurgica","volume":"23 12","pages":"Pages 2025-2028"},"PeriodicalIF":0.0,"publicationDate":"1989-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0036-9748(89)90225-1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73767232","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 : 1989-12-01DOI: 10.1016/0036-9748(89)90244-5
J. Whittenberger, L. Westfall, M. Nathal
{"title":"Compressive strength of a B2 matrix NiAlNb intermetallic at 1200 and 1300 K","authors":"J. Whittenberger, L. Westfall, M. Nathal","doi":"10.1016/0036-9748(89)90244-5","DOIUrl":"https://doi.org/10.1016/0036-9748(89)90244-5","url":null,"abstract":"","PeriodicalId":21604,"journal":{"name":"Scripta Metallurgica","volume":"59 1","pages":"2127-2130"},"PeriodicalIF":0.0,"publicationDate":"1989-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75289023","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 : 1989-12-01DOI: 10.1016/0036-9748(89)90245-7
C. Xie, L. C. Zhao, T. Lei
{"title":"Effect of precipitates on the electrical resistivity-temperature curves in an aged Ti-51.8 at % Ni shape memory alloy","authors":"C. Xie, L. C. Zhao, T. Lei","doi":"10.1016/0036-9748(89)90245-7","DOIUrl":"https://doi.org/10.1016/0036-9748(89)90245-7","url":null,"abstract":"","PeriodicalId":21604,"journal":{"name":"Scripta Metallurgica","volume":"36 1","pages":"2131-2136"},"PeriodicalIF":0.0,"publicationDate":"1989-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74104000","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 : 1989-12-01DOI: 10.1016/0036-9748(89)90247-0
P. Ratnaparkhi, H. Rack
{"title":"Aging effects on the fracture toughness of SiC whisker reinforced 2XXX aluminum alloys","authors":"P. Ratnaparkhi, H. Rack","doi":"10.1016/0036-9748(89)90247-0","DOIUrl":"https://doi.org/10.1016/0036-9748(89)90247-0","url":null,"abstract":"","PeriodicalId":21604,"journal":{"name":"Scripta Metallurgica","volume":"9 1","pages":"2143-2146"},"PeriodicalIF":0.0,"publicationDate":"1989-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81283588","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 : 1989-12-01DOI: 10.1016/0036-9748(89)90232-9
M. Mills
{"title":"Determination of compositional ordering at grain boundaries in boron-doped Ni3Al","authors":"M. Mills","doi":"10.1016/0036-9748(89)90232-9","DOIUrl":"https://doi.org/10.1016/0036-9748(89)90232-9","url":null,"abstract":"","PeriodicalId":21604,"journal":{"name":"Scripta Metallurgica","volume":"83 1","pages":"2061-2066"},"PeriodicalIF":0.0,"publicationDate":"1989-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85968095","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 : 1989-12-01DOI: 10.1016/0036-9748(89)90243-3
B. Badan, M. Magrini, E. Ramous
{"title":"Structural characterization of rapidly quenched AlFe alloys","authors":"B. Badan, M. Magrini, E. Ramous","doi":"10.1016/0036-9748(89)90243-3","DOIUrl":"https://doi.org/10.1016/0036-9748(89)90243-3","url":null,"abstract":"","PeriodicalId":21604,"journal":{"name":"Scripta Metallurgica","volume":"17 1","pages":"2121-2125"},"PeriodicalIF":0.0,"publicationDate":"1989-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89113591","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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