E562-19e1 New! | Astm

ASTM E562-19e1 is the standard test method for determining the volume fraction of constituents in a microstructure using a systematic manual point count on polished, planar sections. The method utilizes a grid to count points falling within specific phases, providing a statistical average and a 95% confidence interval for accurate material analysis. Purchase the standard from ASTM International ASTM International

The foundation of ASTM E562-19e1 lies in stereology—the multi-dimensional interpretation of three-dimensional structures from two-dimensional cross-sections.

P̄=∑Pincap P bar equals the fraction with numerator sum of cap P sub i and denominator n end-fraction Standard Deviation (

) is calculated by dividing the total number of "hits" by the total number of points applied across all fields. 3. Statistical Confidence and Precision astm e562-19e1

) is poor. This indicates to the operator that more fields of view must be evaluated to drive down the statistical error and meet standard precision requirements. 7. Key Updates and Technical Nuances in E562-19e1

: Capable of reflecting light to view polished and etched specimens.

s=∑(PP,i−P̄P)2n−1s equals the square root of the fraction with numerator sum of open paren cap P sub cap P comma i end-sub minus cap P bar sub cap P close paren squared and denominator n minus 1 end-fraction end-root 95% Confidence Interval ( ASTM E562-19e1 is the standard test method for

Prepare the specimen using standard metallographic techniques (such as ASTM E3). Etch the sample sufficiently so that the boundaries of the constituent of interest are sharp and unambiguous under the microscope. Step 2: Selecting Magnification

ASTM E562 expresses precision as Percent Relative Accuracy (%RA). A lower %RA indicates higher confidence. It is calculated as:

With the grid, fields, and total point count determined, the counting process begins. The analyst systematically moves the microscope stage to new, unbiased fields. For each field, the grid is placed, and the analyst counts and records the number of points that fall on the phase of interest. P̄=∑Pincap P bar equals the fraction with numerator

ASTM E562-19e1 can be applied across various industries, including but not limited to:

The journey through the nebula was rough, but she landed in Perseverance’s battered hangar. Vega met her, face pale, holding a polished metal disc no bigger than her palm.

Samples are ground and polished to a mirror finish, typically down to diamond or alumina suspension.