ASTM E2109-01 outlines two primary quantitative evaluation techniques using digital image analysis. Both methods require a specimen cut parallel to the hot-working direction. Method A: The Grid Line Intercept Technique
E2109 Standard Test Methods for Determining Area Percentage Porosity in Thermal Sprayed Coatings. ASTM International
Excessive voids reduce the cohesive strength of the coating, leading to premature delamination or spalling.
Achieving reproducible data requires strict adherence to the sample preparation and testing sequence detailed below.
ASTM E2109-01, titled "Standard Test Methods for Determining Area Fraction by Systematic Manual Point Counting and Automated Image Analysis," outlines the procedures to measure how much of a material's cross-section is occupied by a specific feature [1]. Key Scope and Application astm e2109-01 pdf
Modern metallurgical labs utilize dedicated software paired with optical microscopes to automate ASTM E2109-01 compliance.
ASTM E2109-01 is a standardized test method published by ASTM International. Its full title is
Thermal sprayed coatings (TSCs) are applied in industries ranging from aerospace to power generation, often to provide wear resistance, corrosion protection, or thermal barrier properties. But here's the challenge: during the spraying process, porosity can form due to either a lack of fusion between sprayed particles or the expansion of gases trapped during coating application.
During industrial processes like rolling, forging, or extrusion, chemical segregation and mechanical deformation distort the material. This creates alternating bands of different phases (such as ferrite and pearlite in carbon steels). Key Scope and Application Modern metallurgical labs utilize
Ensure your team is familiar with metallographic sample preparation
This method places a digital grid of parallel lines over the microstructural image.
: High porosity often leads to lower tensile strength and fatigue resistance. Thermal Conductivity
The ASTM E2109-01 document details two primary procedures for measuring porosity: (Manual Point Counting) and Test Method B (Automatic Image Analysis). 1. Metallographic Specimen Preparation often to provide wear resistance
The official standard for (often found as its current reapproved version, ASTM E2109-01R21 ) provides standardized test methods for determining the area percentage porosity in thermal sprayed coatings (TSCs). Key Specifications of ASTM E2109-01
: The material exhibits different tensile strength, ductility, and impact toughness when tested parallel to the banding versus perpendicular to it.
What or alloy are you currently analyzing?