Purchase your copy of ASTM E – 02() as a PDF download or hard copy directly from the official BSI Shop. All BSI British Standards. Find the most up-to-date version of ASTM E at Engineering ASTM E – E – 02 The test methods provide for reporting of specic, distinctive informati.
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An example photomicrograph of the necklace condition appears in Fig. The operator ee1181 set any size field area using the Set Field button. If the specimen being examined is the full cross-section of a round ashm, the longitudinal section should not be used to estimate the area fraction occupied by different grain sizes.
The grain size and area fraction values shown in a given report format correspond to the appearance of the photomicrograph shown. This standard does not purport to address all of the safety concerns associated with its use. The histogram suggests that the specimen evaluated contains more than a single distribution of grain sizes.
Choose any of several preparation functions with a single mouse click.
ASTM E – 02 Standard Test Methods for Characterizing Duplex Grain Sizes
Click here to display results spreadsheet. Current results may be erased by clicking on the “Erase Current Results” button.
Reduce that error by using graded area fraction comparison gures see Fig. The area occupied by the ne grains is what must be determined. Next apply a regular two-dimensional grid to the outlined image.
Calibration is set by clicking on the “Calibrate” choice in the Dialog Menu Bar. Use one of the procedures from 8. Classication of the duplex grain size see 8. E — 02 The test methods provide for reporting of specic, distinctive information for each type of duplex grain size. Duplex grain structures for example, multiphase alloys are not necessarily duplex in grain size, and as such are not the subject of these methods.
Results are also sent to an Excel spreadsheet – “Grainrpt. The values in the seventh column were summed to give the total intercept length for this evaluation This value was then entered in the eighth column. An example of such a histogram is shown in Fig.
ASTM E1181 – 02(2015)
The Planimetric Procedure of E does not lend ee1181 to determination of grain size in distinct small areas, and so should not be used. These different applications are described in 8. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. The Measuring and Referee Procedures are more difficult to apply, but offer greater accuracy.
An example photomicrograph of the banding condition appears in Fig. The test grid consists of a w1181 of ne, parallel lines, with an interline spacing of 5 mm. All results may be erased by clicking on the “Erase All Results” button.
Use Methods E to determine the size of the smallest grains found in the specimen, and Methods E to estimate the size of the largest grain found in the specimen. The test methods separate duplex grain sizes into one of two distinct classes, then into specific types within those classes, and provide systems for grain size characterization of each type.
These are available from microscope manufacturers. Each photomicrograph is accompanied by the corresponding reporting format for that type of duplex grain size. In this example, a class interval of 1 mm was chosen. For comparison of mechanical properties with metallurgical features, or for specification purposes, it may be important to be able to characterize grain size in such materials. And, as an alternative, the test methods offer a procedure for statistically determining the distribution of all the grain sizes present in a duplex grain size specimen.
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Such a method is subject to considerable error. This standard is subject to revision at any time by the responsible technical committee and must be reviewed every ve years and if not revised, either reapproved or withdrawn. Use ashm the grid is described in Methods E The Comparison Procedure is the simplest, but offers the least accuracy.
Practice E FIG.
For example, averaging two distinctly different grain sizes may result in reporting a size that does not actually exist anywhere in the specimen. Accordingly, the longitudinal orientation is recommended, with one exception. Assigning an average grain size value to a duplex grain size specimen does not adequately characterize the appearance of that specimen, and may even misrepresent its appearance. A tube whose wall thickness is small compared to its outside diameter may be treated as equivalent to a product of rectangular cross-section, in that a surface e181 of a given depth at 5 the outside diameter covers essentially the same area as e181 layer of the same depth at the inside diameter.
Estimate the area fraction for the grain size region being evaluated as the number of grid points falling within the region, divided by the total number of grid points that lie within the total image outline the grid must be large enough to completely cover the total image. The asmt of the total intercept length represented by asttm intercept length in each class interval was then calculated by dividing each value in the seventh column by the total intercept length Duplex grain structures for example, multiphase alloys are not necessarily duplex in grain size, and as such are not the subject of these methods.
These aetm are briey described below, under the headings of the specic procedures to which they apply. If additional traverses can be made, they will improve the precision of the nal area fraction estimate.
These procedures will be more difficult to apply than the Comparison Procedure of E, but will offer greater precision. Complete measurement results along with statistics may be viewed by clicking on the File option in the dialog Menu Bar. If you feel that your comments have not received a fair hearing you should make your views known to asgm ASTM Committee on Standards, at the address shown below. For example, averaging two distinctly different grain sizes may result in reporting a size that does not actually exist anywhere in the specimen.
Use of the grid is described in 8. It is the responsibility of the user of this standard to consult appropriate safety and health practices and determine the applicability of regulatory limitations prior to its use. Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm.