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.
|Published (Last):||16 September 2018|
|PDF File Size:||6.22 Mb|
|ePub File Size:||1.1 Mb|
|Price:||Free* [*Free Regsitration Required]|
ASTM E562 – 11
Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm.
This test method has been described 4 as being superior to other manual methods with regard to effort, bias, and simplicity. In this case, more rigorous statistical signi?
The point grid, with four times the number of grid points, decreased? Guidelines are given in 9. The average point fraction for n measured? The value of the multiplier, t, can be found in Table 1. Diagrams of two possible grids, ast, with a circular pattern and atsm with a square pattern, which are recommended for use, are shown in Fig.
Repeated point count measurements on an individual micrograph is not allowed. The equations for calculating these values are as follows: Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. 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.
Originally published as E — If another method of? This can be accomplished by moving the x and y stage mechanism a?
ASTM International – Standard References for ASTM E – 11
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. This can be achieved by using either a circular grid or a square grid placed at an angle to ashm microstructural periodicity. 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.
Historical Version s – view previous versions of standard. Thus, the method e56211 be applied to any type of solid material from which adequate e56211 sections can be prepared and observed.
Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. Precision and Bias 5 Two common types of grids circular or square array are shown in Fig. Work Item s – proposed revisions of axtm standard.
ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard.
These values were calculated under the assumption that the features have a random distribution upon the f562-11 section. Table 2 provides guidelines for this selection. Point counting measurements should be completed on different? 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.
A number in parentheses indicates the year of last reapproval. Summary of Test Method 4. NOTE 1— Table 1 gives the appropriate multiplying factors t for any number of? Table 3 gives a guide to the number of? However, it should be recorded since it may have an effect upon the precision obtained.
Thus, the method can be applied to any type of solid material from which adequate twodimensional sections can be prepared and observed. Published June 10, Improving the Volume Fraction Estimate If you feel that your comments have not received a fair hearing you qstm make your views known to the ASTM Committee on E562-11, at the address shown below. No other units of measurement are included in this standard.
Guidelines are given in Section 8. This standard is subject to revision at any time by the responsible technical committee and must be reviewed every? 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. Historical Version s – view previous versions of standard Work Item s e5621-1 proposed revisions of this standard Translated Version s: Any number of clearly distinguishable constituents or phases within a microstructure or macrostructure can be counted using the method.
A grand average can be calculated by taking the average of the e562-1 means in this case. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. This additional effort should reduce the con?
Guidelines are given in 7. To avoid bias, questionable points should be counted as one half.
Standard Test Method f 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.
The use of —point grid facilitates easy volume percent calculations. Link to Active This link will always route to the current Active version of the standard. A superscript epsilon e indicates an editorial change since the last revision or reapproval.