What are the stages of the metal tensile test?

Metal tensile test is a relatively common experiment in the mechanical performance test of metal materials, which can reflect the basic properties of the material. It is also very necessary for our precision stamping parts manufacturers. So, let's take a look at the stages of the metal tensile test. 1. Elastic stage: 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, and the elastic modulus of the material can be measured at this stage. 2. Yield stage: Plain carbon steel: After the elastic stage, the load is almost unchanged, but fluctuates up and down in a small range, and the elongation of the sample increases sharply. This phenomenon is called yielding. 3. Strengthening stage: After the sample passes through the yield stage, the curve shows an upward trend. Because the material is continuously strengthened during the plastic deformation process, the material's anti-deformation ability is enhanced. This phenomenon is called strain hardening. If the load is unloaded to zero at this stage, the deformation has not completely disappeared, and the residual strain when the stress is reduced to zero is called plastic strain or residual strain. 4. In the necking stage and breaking stage, after the sample is stretched to a certain extent, the load reading gradually decreases. [Related recommendation] Learn more: 精の corporate culture Learn more: Continuous improvement and innovation are the key factors for the survival of stamping companies Learn more: The development of the metal stamping processing industry