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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A superscript epsilon e indicates an editorial change since the last revision or reapproval. Any f562-11 of clearly distinguishable constituents or phases within a microstructure or macrostructure can be counted using the method. Improving the Volume Fraction Estimate Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.
No other units of measurement are included in this standard.
ASTM E562 – 11
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.
These values were e52-11 under the assumption that the features have a random distribution upon the metallographic section. If another method of?
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. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. Two common types of grids circular or square array are shown in Fig.
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.
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 standard is subject to revision at any time by the responsible technical committee and must be reviewed every?
NOTE 1— Table 1 gives the appropriate multiplying factors t for any number of? The equations for calculating these values are as follows: A number in parentheses indicates the year of last reapproval. 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.
Link to Active This link will always route to the current Active version of the standard. Historical Version s – view previous versions of standard. Thus, the method can be applied to any type of solid material from which adequate twodimensional sections can be prepared and observed. Table 2 provides guidelines for this selection. The values in Table 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.
Last previous edition E — Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. This can be accomplished by moving the x and y stage mechanism a? To avoid bias, questionable points should be counted as one half.
A grand average can be calculated by taking the average of the set means in this case. Originally published as E — Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm.
Precision and Bias 5 ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard. Guidelines are given in 9. This can be achieved by using either a circular grid or a square grid placed at an angle to the microstructural periodicity. Thus, the method can be applied to any type of solid material from which adequate two-dimensional sections can be prepared and observed.
Repeated point count measurements on an individual micrograph is not allowed.
Current edition approved April 10, The use of —point grid facilitates easy volume percent calculations. Work Item s – proposed revisions of this standard. Guidelines are given in Section 8. 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.
Published June 10, This method is applicable only to e562-1 opaque planar sections viewed with re? The value of the multiplier, t, can be found in Table 1. Point counting measurements should be completed on different?
ASTM International – Standard References for ASTM E – 11
If no sample heterogeneity is indicated that is, the con? 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.
In this case, more rigorous statistical signi? The point grid, with four times the number of grid points, decreased?