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Application in metal material tension test


Tensile tests are to be carried out when evaluating the strength of metallic materials. In order to detect small changes in metal cracks or shape, you can measure the AC resistance of sample (called AC potential method).

Tensile tests are to be carried out when evaluating the strength of metallic materials. In order to detect small changes in metal cracks or shape, you can measure the AC resistance of sample (called AC potential method). Since the resistance of metal is very low, the resulting voltage is also very weak, so it’s useful for a lock-in amplifier. By comparing with reference samples without stress, errors caused by factors such as temperature changes can be avoided and the first minute cracks or changes in shape can be detected.