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Which major categories of tests are used in materials testing?
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materials science
Movement of an electron hole in a crystal lattice.
In materials science, materials testing is the measurement of the characteristics and behavior of substancesāsuch as metals, ceramics, or plasticsāto determine their suitability for specific applications.1
Materials testing is divided into five major categories:
- Mechanical testing: Evaluates how a material responds to loads, including tests for hardness, ductility, and strength.12
- Testing for thermal properties: Examines how materials behave under heat, often involving techniques like differential thermal analysis to identify chemical composition through phase changes.13
- Testing for electrical properties: Measures how materials conduct or resist electrical currents.1
- Testing for resistance to corrosion, radiation, and biological deterioration: Assesses how well a material withstands environmental stressors and degradation over time.1
- Nondestructive testing: Uses methods such as ultrasonic echolocation or acoustic emission to inspect the integrity of structures without damaging them, allowing for the identification of cracks, corrosion, or other internal flaws.41
Standardized procedures for these tests are established by organizations such as the International Organization for Standardization and the American Society for Testing and Materials.1