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Applications of modern metallographic techniques

ANNUAL MATERIALS ENGINEERING EXPOSITION AND CONGRESS (1969 : PHILADELPHIA) AUTOR
Applications of modern metallographic techniques by ANNUAL MATERIALS ENGINEERING EXPOSITION AND CONGRESS (1969 : PHILADELPHIA) AUTOR PDF

Author : ANNUAL MATERIALS ENGINEERING EXPOSITION AND CONGRESS (1969 : PHILADELPHIA) AUTOR
Publisher :
Page : 272 pages
File Size : 45,12 MB
Release : 1970
Category : Metallography
ISBN :

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Practical Applications of Quantitative Metallography

J. H. Steele
Practical Applications of Quantitative Metallography by J. H. Steele PDF

Author : J. H. Steele
Publisher : ASTM International
Page : 204 pages
File Size : 24,73 MB
Release : 1984
Category : Technology & Engineering
ISBN : 9780803102200

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An improved procedure based on the intercept method of measuring the grain size of single-phase microstructures has been developed that provides a quantitative description of the grain size yet is fast. The procedure combines the statistical advantage of using large numbers with the advantage of interpreting the data as a normal distribution, as verified by the chi square test. Application of the procedure to ferritic microstructures representative of best and worst case conditions indicates that accuracies on the order of 3 percent at a 95 percent confidence level can be achieved. In addition, the procedure is sensitive enough to distinguish a randomly mixed duplex grain structure. The measurements associated with a two-phase microstructure can be more precisely quantified through determination of volume fractions using a Pp measurement based on the use of an appropriate grid network, the coefficient of variation statistic, and the Poisson distribution. The analysis is demonstrated for an a priori system for which the percent accuracy and confidence level can be specified for the volume fraction measurement simply from calculation of the average value for Pp.