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ASTM E562-11
Standard Test Method for Determining Volume Fraction by Systematic Manual Point Count
Стандартная методика испытаний для определения объемной долевой концентрации с использованием систематического ручного точечного подсчета
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Разработчик:
Зарубежные/ASTM
ICS:
77.040.99 Other methods of testing of metals / Методы испытания металлов прочие
Сборник (ASTM):
03.01 Metals -- Mechanical Testing; Elevated and Low-Temperature Tests; Metallography / Металлы - Механические испытания, Испытания при высоких и низких температурах, Металлография
Тематика:
Physical & Mechanical Testing
Описание
Значение и использование

This test method is based upon the stereological principle that a grid with a number of regularly arrayed points, when systematically placed over an image of a two-dimensional section through the microstructure, can provide, after a representative number of placements on different fields, an unbiased statistical estimation of the volume fraction of an identifiable constituent or phase (1, 2, 3).

This test method has been described (4) as being superior to other manual methods with regard to effort, bias, and simplicity.

Any number of clearly distinguishable constituents or phases within a microstructure (or macrostructure) can be counted using the method. Thus, the method can be applied to any type of solid material from which adequate two-dimensional sections can be prepared and observed.

A condensed step-by-step guide for using the method is given in Annex A1.

Область применения

1.1 This test method describes a systematic manual point counting procedure for statistically estimating the volume fraction of an identifiable constituent or phase from sections through the microstructure by means of a point grid.

1.2 The use of automatic image analysis to determine the volume fraction of constituents is described in Practice E1245.

1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

Ключевые слова:
Metallographic analysis/inspection; Point count; Systematic manual point count; Volume change