ASTM EStandard Test Method for Determining Volume 1 95 % Con? dence Interval Multipliers No. of Fields n 5 6 7 8 9 10 11 12 13 ASTM Standard E, using an image analysis routine with Leica .. of Constructional Steel Research 64(11) doi: / ASTM E Standard Test Method for Determining Volume Fraction by Systematic Manual Point Count. Front Cover. American Society for Testing and.
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This can be accomplished by moving the x and y stage mechanism a? Do not observe the image while translating to a new? ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard. A superscript epsilon e indicates an editorial change since the last revision or reapproval.
Table 3 gives a guide to the number of? This can be achieved by using either a circular grid or a square grid placed at an angle to the microstructural periodicity.
Precision and Bias 5 If no sample heterogeneity is indicated that is, the con? The values in Sstm 2 do not correspond to theoretical constraints; but, by using these values, empirical observations have shown that the method is optimized for a given precision. No other units of measurement are included in satm standard.
The point grid, with four times the number of grid points, decreased? 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 s562-11 volume fraction of an identifiable constituent or phase 1, 2, 3.
Table 2 provides guidelines for this selection.
ASTM International – Standard References for ASTM E – 11
Guidelines are given in 9. This method is applicable only to bulk opaque planar sections viewed with re?
Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility. These values were calculated under the assumption that the features have a random distribution upon the metallographic section. This test method has been described 4 as being superior to other manual methods with regard to effort, bias, and simplicity.
ASTM E562 – 11
A grand average can be calculated by taking the average of the set means in this case. Two common types of grids circular or square array are shown in Fig. Thus, the method can be applied to any type of solid material from which adequate twodimensional sections can be prepared and observed.
Standard Test Method f Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefax xstm, or service astm. The average point fraction for n measured?
Historical Version s – view previous versions of standard.
Referenced Documents purchase separately The documents listed below are referenced within the subject standard e52-11 are not provided as part of the standard. Guidelines are given in Section 8. If another method of? Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. The equations for calculating these values are as follows: This additional effort should reduce the con?
Improving the Volume Fraction Estimate To avoid bias, questionable points should be counted as one half. Point counting measurements should be completed on different? A number in parentheses indicates the year of last reapproval.
Summary of Test Method 4. Last previous edition E — In this case, more rigorous statistical signi? Originally published as E — Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. 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. Work Item s – proposed revisions of this standard.