Prediction method for microstructure evolution of shot peening strengthening material

A technology of shot peening and tissue evolution, which is applied in computer material science, design optimization/simulation, instruments, etc., can solve the problems of difficult microstructure observation, insufficient material structure refinement mechanism, and high test cost

Pending Publication Date: 2020-10-23
CHONGQING UNIV
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Problems solved by technology

However, due to the high cost of the test, it is difficult to popularize the observation of the microstructure of the shot-peened material in the engineering field.
Therefore, in actual engineering, there ar...

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  • Prediction method for microstructure evolution of shot peening strengthening material
  • Prediction method for microstructure evolution of shot peening strengthening material
  • Prediction method for microstructure evolution of shot peening strengthening material

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Embodiment Construction

[0024] Below in conjunction with accompanying drawing and embodiment the effect of the present invention will be further described:

[0025] This embodiment includes the following steps:

[0026] Step 1. In the process of shot peening, simplify the situation that the surface of the metal parts is continuously impacted by the shot flow, and use the ABAQUS platform to establish a three-dimensional shot peening model of the spherical projectile impacting the target.

[0027] See the literature "Investigation on the effect of shot peening coverage on the surface integrity", Lin, Applied Surface Science, vol.489, pp.66-72 ("The impact of shot peening coverage on the surface integrity", Lin, Applied Surface Science , Vol. 489, 2019, pp. 66-72) records that the modeling method of the target body is as follows: the shot peening area in the middle of the target body is divided by a grid with a small enough size to ensure the calculation accuracy of the model, and the Infinite elements...

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Abstract

The invention discloses a prediction method for microstructure evolution of a shot peening strengthening material. The prediction method comprises the following steps: 1, establishing a three-dimensional shot peening model by using an ABAQUS platform; 2, embedding a constitutive equation based on dislocation density evolution into the shot peening strengthening three-dimensional model; 3, measuring the radius of the crater; 4, calculating the number of shots required in a unit area when the shot blasting coverage rate reaches a set value; 5, establishing a shot peening strengthening three-dimensional model with multiple randomly distributed shots; and 6, analyzing the process that the projectile flow impacts the target body by using an ABAQUS/Express solver, and calculating to obtain the dislocation cell size and the dislocation density distribution. The method has the technical effects that under the condition of considering the relationship between the macroscopic stress-strain fieldand the microstructure of the material, the evolution data of the microstructure of the material by different shot peening strengthening parameters is obtained, the understanding of shot peening process parameters is deepened, the shot peening process parameters are optimized, and the shot peening strengthening treatment effect is improved.

Description

technical field [0001] The invention belongs to the technical field of metal material processing, and specifically relates to a method for predicting the evolution of residual stress and material microstructure after shot peening on the surface of metal parts, and also relates to a method that considers the relationship between the macroscopic stress-strain field and the material microstructure. A method for predicting the surface dislocation density distribution gradient and dislocation cell size distribution gradient of metal parts after shot peening. Background technique [0002] As a typical surface strengthening technology, shot peening has the characteristics of high efficiency, low energy consumption and remarkable strengthening effect. It is widely used in the surface strengthening of metal parts in wind power, ships, automobiles, aviation and other industries. . After the surface of metal parts is shot peened, plastic deformation occurs on the surface. Under the ac...

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Application Information

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IPC IPC(8): G06F30/23G16C60/00G06F119/14
CPCG06F30/23G16C60/00G06F2119/14
Inventor 刘怀举林勤杰周霜霜魏沛堂吴吉展
Owner CHONGQING UNIV
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