Factors affecting toughness do not include personality.
Factors affecting toughness include
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What are the factors that affect impact toughness?
Chemical composition, internal defects, processing technology and environmental temperature will all affect impact toughness.
The test shows that the impact toughness decreases with the decrease of temperature, and its law is that it begins to decrease gently. After a certain temperature range, the impact toughness suddenly decreases a lot and becomes brittle, which is called cold brittleness of steel. The temperature at this time is called brittle critical temperature.
The practical significance of impact toughness index lies in revealing the brittleness tendency of materials and reflecting the ability of metal materials to resist external impact load. Generally, it is expressed by impact toughness value (ak) and impact work (Ak), and the units are J/cm2 and J (Joule) respectively.
Impact toughness (impact value) ak
The pendulum impact bending test is often used in engineering to measure the ability of materials to resist impact load, that is, to measure the impact work Ak consumed when the impact load sample is broken, and the unit is Joule (J).
The impact toughness (impact value) index of the material can be obtained by subtracting Ak from the cross-sectional area f at the notch of the sample, that is, ak=Ak/F, and the unit is kJ/m2 or J/cm2.
Therefore, impact toughness ak represents the ability of materials to resist deformation and fracture under impact load. The ak value indicates the toughness of the material.
Generally, materials with low ak value are called brittle materials, and materials with high ak value are called ductile materials.
The ak value depends on the material and its state, and has a great relationship with the shape and size of the sample. Ak value is very sensitive to internal structural defects and microstructure changes of materials, such as inclusions, segregation, bubbles, internal cracks, temper brittleness and grain coarsening of steel, which will obviously reduce ak value; The deeper and sharper the notch, the greater the stress concentration at the notch, the easier it is to deform and fracture, and the smaller the impact work, the higher the brittleness of the material. Therefore, the ak or Ak values of samples of different types and sizes cannot be directly compared.
The ak value of the material decreases with the decrease of temperature, and the ak value drops sharply in a certain temperature range. This phenomenon is called cold embrittlement, and this temperature range is called "ductile-brittle transition temperature (Tk)".
Factors affecting the toughness of materials
The toughness of metal decreases with the increase of loading speed, the decrease of temperature and the intensification of stress concentration.
Factors affecting college students' psychological resilience do not include
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Please complete the question.
In order to answer
What are the factors that affect toughness?
The toughness of metal decreases with the increase of loading speed, the decrease of temperature and the intensification of stress concentration.
What factors are related to the impact toughness of steel?
The impact toughness of steel is affected by chemical composition, heat treatment state, smelting method, internal defects, processing technology and environmental temperature.
What are the influencing factors of psychological resilience?
Experience, what connection should we have?