{"title":"Analysis of γ1 shape changes in a single crystal Ni-Base superalloy","authors":"J. Gayda, R.A. MacKay","doi":"10.1016/0036-9748(89)90467-5","DOIUrl":null,"url":null,"abstract":"<div><p>Analysis of <em>γ</em><sup>1</sup> shape changes in a “commercial” nickel-base single crystal superalloy, NASAIR 100, was performed using a novel microstructural lattice model, MCFET. A negative mismatch of −0.3% and a modulos ratio (E<em>γ</em><sup>1</sup>/E<em>γ</em>) of 1.12 were used in the analysis. These values were based on actual high temperature measurements for NASAIR 100. Under a uniaxial stress, a regular array of <em>γ</em><sup>1</sup> particles in the simulated microstructure was predicted to coalesce and form a plate morphology in which the broad faces of the plates and stress axis were perpendicular in tension but parallel in compression. These results were consistent with <em>γ<sup>1</sup></em> shape changes observed in NASAIR 100 after creep testing at 1000C.</p></div>","PeriodicalId":21604,"journal":{"name":"Scripta Metallurgica","volume":"23 11","pages":"Pages 1835-1838"},"PeriodicalIF":0.0000,"publicationDate":"1989-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0036-9748(89)90467-5","citationCount":"25","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Scripta Metallurgica","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/0036974889904675","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 25
Abstract
Analysis of γ1 shape changes in a “commercial” nickel-base single crystal superalloy, NASAIR 100, was performed using a novel microstructural lattice model, MCFET. A negative mismatch of −0.3% and a modulos ratio (Eγ1/Eγ) of 1.12 were used in the analysis. These values were based on actual high temperature measurements for NASAIR 100. Under a uniaxial stress, a regular array of γ1 particles in the simulated microstructure was predicted to coalesce and form a plate morphology in which the broad faces of the plates and stress axis were perpendicular in tension but parallel in compression. These results were consistent with γ1 shape changes observed in NASAIR 100 after creep testing at 1000C.
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