Several steps of metal tensile test 7.29

In the metal manufacturing process, a very important mechanical property is the tensile ability of the metal. Metal tensile test is one of the commonly used and important test methods in the mechanical property test of metal materials. It is related to the toughness and strength of the metal, and the tensile performance is determined by the tensile test. Next, INVITECH Precision will introduce several stages of the metal tensile test.

Metal tensile test is generally divided into four stages:

1. Elastic phase: As the load increases, the strain increases in proportion to the stress. If the load is removed, the specimen will return to its original state, showing elastic deformation.

2. Yield stage: ordinary carbon steel: beyond the elastic stage, the load is almost unchanged, but fluctuates on both sides within a small range, and the elongation of the sample increases sharply. This phenomenon is called yielding.

3. Strengthening stage: After the end of the yielding stage, if the specimen is to continue to elongate, the resistance in the specimen will continue to increase due to the continuous strengthening of the material during the plastic deformation process. With the increase of strain and stress, the upper limit value of the force is the limit value of the tensile strength of the metal material.

4. Necking stage: when the strain increases and the stress decreases, the metal material will appear "necked" state until it breaks.