At Om Metalab Services Pvt. Ltd. the grain size test and distribution of particles in a substance, usually metals or ceramics, can be found out through a technique called grain size testing. It offers useful details about the microstructure and characteristics of the substance.
Grain Size Testing Methods at Om Metalab
- Optical Microscopy: Using optical microscopy, we examine a prepared sample under a microscope to measure the size of individual grains. This method involves a calibrated eyepiece reticle or advanced image analysis software to provide accurate measurements. Optical microscopy is a quick and cost-effective method, capable of determining grain sizes ranging from a few micrometers to several hundred micrometers.
- Electron Backscatter Diffraction (EBSD): EBSD is a powerful technique based on scanning electron microscopy (SEM). It allows for the simultaneous determination of crystallographic details and grain size. By analyzing the diffraction patterns created by electrons interacting with the sample, EBSD offers precise information about the crystal structure and orientation of individual grains. This method is ideal for submicron and nanoscale grain size analysis.
- X-Ray Diffraction (XRD): XRD is primarily used for phase identification and crystallography, but it also provides grain size data based on the broadening of diffraction peaks. While not commonly used for precise grain size measurement, XRD is helpful in identifying average grain size and understanding the material’s atomic structure.
- Image Analysis: Digital image analysis tools are employed to measure grain size from images obtained through various microscopy techniques. This method is especially effective when analyzing large numbers of grains or complex grain shapes. The software breaks down the image into individual grains and assesses their size distribution, making it a versatile approach for grain size testing.
Why Grain Size Testing is Important:
Grain size plays a crucial role in determining a material’s mechanical properties, including strength, toughness, and ductility. Understanding grain size distribution helps in selecting the right materials for specific applications, ensuring quality control, and improving product performance.
Standard we tested to
| Sr. No. | Discipline: Grain Size | Test Methods |
| 1 |
Average Grain Size By Comparison Method |
ASTM E112: 2021, IS 4748: 2021 |