{"title":"High-resolution measurement of crack-tip plastic zone sizes by selected area channelling patterns","authors":"A. Tekin, J.W. Martin","doi":"10.1016/0026-0800(89)90018-9","DOIUrl":null,"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":0.0000,"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":"19","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Metallography","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/0026080089900189","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 19
Abstract
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.
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.
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