tensile test
The tensile test is a testing method to determine the mechanical properties of a material under tensile loading. The specimen is stretched until fracture to measure its strength and ductility.
Physical-Chemical Mechanism of Action
The tensile test method involves pulling a test bar in a tensile testing machine. The specimen is continuously stretched until fracture while stress and strain are measured. This allows determining the hardness and the maximum stress the material can withstand.
Metallurgical Relevance & Welding Risks
The tensile test is critical for safety evaluation of welded joints. A low tensile value indicates low strength, which can lead to cracking and failure in service. Therefore, during fabrication, specific specimens must be taken and tested to ensure the joint has the required mechanical properties.
Workshop Practice & Action Guidelines
To perform a tensile test, a test bar is cut from the material to be tested. This specimen is then pulled in a tensile testing machine, and stress and strain are continuously measured. The test ends when the specimen fractures. Results are recorded and compared with specific requirements to ensure the material meets the required mechanical properties.