Quantitative metallografische Analysen Zur Vergleichbarkeit verschiedener Laboratorien
On the Comparability of Quantitative Metallographical Analyses Between Laboratories
Konrad Breitkreutz und Andreas Neidel
ABSTRACT Comparability of laboratory analyses, especially in the field of quantitative metallography, is a prerequisite for normal business processes between suppliers of metallic products and their customers. Round robin tests have shown that, because of the many factors influencing analytical results, this comparability cannot be taken for granted. Apart from several factors which can be clearly determined, there are some parameters which cannot be determined exactly and which further complicate direct comparison of quantitative metallographic analyses between laboratories. To overcome these difficulties, several approaches are proposed in this paper, i.e. to exactly determine as many influencing factors and measuring parameters as possible, to submit binary images as an integral part of analytical results, not to use different software systems for quantitative image analysis if results should be comparable and finally to calibrate software systems for image analysis using model microstructures with known phase contents.
Publication Source: Materialprüfung, ISSN: 0025-5300
Issue: 2003-5, pp 220-222
Publisher: Carl Hanser Verlag München
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