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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The use of —point grid facilitates easy volume percent calculations. Current edition approved April 10, 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 e52-11 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.
This standard is subject to revision at any time by the responsible technical committee and must be reviewed every? Published June 10, Last previous edition E — The average point fraction for n measured?
Do not observe the image while translating to a new? However, it should be recorded since it may have an effect upon the precision obtained. No other units of measurement are included in this standard. 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. If another method of? Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.
Diagrams of two possible grids, one with a circular pattern and atm with a square pattern, which are recommended for use, are shown asrm Fig. ASTM International takes no position respecting the validity of any patent rights asserted in e562-11 with any item mentioned in this standard. If no sample heterogeneity is indicated that is, the con?
Table 3 gives a guide to the number of? Table 2 provides guidelines for this selection. Thus, the method can be applied to any type of solid material from which adequate twodimensional sections can be prepared and observed. These values were calculated under the assumption that the features have a random distribution upon the metallographic section. Point counting measurements should be completed on different? astn
ASTM International – Standard References for ASTM E – 11
A number in parentheses indicates the year of last reapproval. Aatm avoid bias, questionable points should be counted as one wstm. This can be accomplished by moving the x and y stage mechanism a? Thus, the method can be applied to any type of solid material from which adequate two-dimensional sections can be prepared and observed. This can be achieved by using either a circular grid or a square grid placed at an angle to the microstructural periodicity.
ASTM E562 – 11
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. NOTE 1— Table 1 gives the appropriate multiplying factors t for any number of?
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.
Two common types of grids circular or square array are shown in Fig. Summary of Test Method 4.
Guidelines are given in 9. A grand average can be calculated by taking the average of the set means in this case. Link to Active This link will always route to the current Active version of the standard.
In this case, more rigorous statistical signi? The value of the multiplier, t, can be found in Table 1. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. Standard Test Method f Historical Version s – view previous versions of standard. Historical Version s – view previous versions of standard Work Item s – proposed revisions of this standard Translated Version s: 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.
Any number of clearly distinguishable constituents or phases within a microstructure or macrostructure can be counted using the method. This test method has been described 4 as being superior to other manual methods with regard to effort, bias, and simplicity. This method is applicable only to bulk opaque planar sections viewed with re? 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.
Originally published as E e56-11 The equations for calculating these values are as follows: Guidelines are given in Section 8.
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Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. This additional effort should reduce the con?