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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Thus, the method can be applied to any type of solid material from which adequate two-dimensional sections can be prepared and observed. Diagrams of two possible grids, one with a circular pattern and one with a square pattern, which are recommended for use, are shown in Fig. This test method has been described 4 as being superior to other manual methods with regard to effort, bias, and simplicity.
However, it should be recorded since it may have an effect upon the precision obtained. These values were calculated under the assumption that the features have a random distribution upon the metallographic section. Guidelines are given in Section 8. Improving the Volume Fraction Estimate Table 3 gives a guide to the number of? To avoid bias, questionable points should be counted as one half.
No other units of measurement are included in this standard. The value of the multiplier, t, can be found in Table 1.
Summary of Test Method 4. This time estimate can probably be decreased to 15 min after some experience and familiarity with the point counting procedure and the microstructure analyzed are obtained.
Guidelines are sstm in 9. If you feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee on Standards, at the address shown below. In this case, more rigorous statistical signi? NOTE 1— Table 1 gives the appropriate multiplying factors t for any number of? Guidelines are given in 7.
Precision and Bias 5 A grand wstm can be calculated by taking the average of the set means in this case. Published June 10, Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phone s562-11, faxor service astm.
Last previous edition E — Historical Version s – view previous versions of standard. Table 2 provides guidelines for this selection. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.
The values in Table 2 do not correspond to theoretical constraints; but, by using these values, empirical w562-11 have shown that the method is optimized for a given precision.
ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard. Thus, the method can be applied to any type of solid material from which adequate twodimensional sections can be prepared and observed.
Work Item s – proposed revisions of this standard. 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.
This can be accomplished by moving the x and y stage mechanism a?
Link to Active This link will always route to the current Active version of the standard. Current edition approved April 10, 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.
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 asttm, 2, 3.
Standard Test Method f Two common types of grids circular or square array are shown in Fig. Point counting measurements should be completed on different? The use of —point grid facilitates easy volume percent calculations.
If no sample heterogeneity is indicated that is, the con? Do not observe the image while translating to a new?
Originally published as E — This additional effort should reduce the con? The equations for calculating these values are as follows: The average point fraction for n measured?
A number in parentheses indicates the year of last reapproval. If another method of?