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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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. Work Item e562–11 – proposed revisions of this standard. Improving the Volume Fraction Estimate 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.
Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. Guidelines are given in Section 8. 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. Do not observe the image while translating to a new?
Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service asstm.
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. Current edition approved April 10, The average point fraction for n measured? Historical Version s – view previous versions of standard. These values were calculated under the assumption e562-111 the features have a random distribution upon the metallographic section. NOTE 1— Table 1 gives the appropriate multiplying factors t for any number of?
Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. A grand average can be e56-211 by taking the average of the set means in this case. Last previous edition E — Summary of Test Method 4. Point counting measurements should be completed on different?
If another method of? The point grid, with four times the number of grid points, decreased? F562-11 avoid bias, questionable points should be counted as one half.
ASTM International – Standard References for ASTM E – 11
No other units of measurement are included in this standard. A number in parentheses indicates the year of last reapproval. 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. Two common types of grids circular or square array are shown in Fig. 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 asym be achieved by using either a circular grid or a square grid placed at an angle to the microstructural periodicity. A superscript epsilon e indicates an editorial change since the last revision or reapproval. 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.
The use of —point grid facilitates easy volume percent calculations. Precision and Bias 5 Any e56211 of clearly distinguishable constituents or phases e5622-11 a microstructure or macrostructure can be counted using the method.
ASTM E562 – 11
This additional effort should reduce the con? Guidelines are given in 9.
The value of the multiplier, t, can be found in Table 1. If no sample heterogeneity is indicated that is, the con?
Table 2 provides guidelines for this selection. Table 3 gives a guide to the number of? However, it should be recorded ast, it may have an effect upon the precision obtained.
This method is applicable only to bulk opaque planar sections viewed with re? Repeated point count measurements on an individual micrograph is not allowed.
ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard. The equations for calculating these values are as follows: Link to Active E5622-11 link will always route to the current Active version asmt the standard. Thus, the method can be applied to any type of solid material from which adequate twodimensional sections can be prepared and observed.
This standard is subject to revision at any time by the responsible technical committee and must be reviewed every? Historical Version s – view previous versions of standard Work Item s – proposed revisions e52-11 this standard Translated Version s: Guidelines are given in 7.
Published June 10,