An analysis method of the influence of ultrasonic shock treatment on the residual stress of a metal component formed by laser selective melting

A laser selective melting and ultrasonic impact technology, applied in the field of additive manufacturing, can solve the problem of not considering initial stress and deformation, and achieve the effect of optimizing impact process parameters

Active Publication Date: 2018-12-11
HARBIN ENG UNIV
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The current simulation analysis generally does not co

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  • An analysis method of the influence of ultrasonic shock treatment on the residual stress of a metal component formed by laser selective melting
  • An analysis method of the influence of ultrasonic shock treatment on the residual stress of a metal component formed by laser selective melting
  • An analysis method of the influence of ultrasonic shock treatment on the residual stress of a metal component formed by laser selective melting

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[0026] The present invention will be further described below in conjunction with the accompanying drawings.

[0027] figure 1 is the finite element mesh division diagram of the impacted member; figure 2 The overall assembly diagram after meshing the punch, impact pin and impacted member; image 3 is the displacement load curve loaded on the punch; Figure 4 It is the lateral direction displacement diagram cut along the centerline longitudinal section of the component after laser selective melting and forming; Figure 5 is the transverse stress distribution after the component is cut along the longitudinal section of the centerline after selective laser melting; Figure 6 is the transverse stress distribution after the impact treatment is cut along the longitudinal section of the centerline; Figure 7 After the impact treatment, the transverse displacement distribution of the component is cut along the longitudinal section of the center line.

[0028] The first is the sim...

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Abstract

The invention belongs to the field of material-adding manufacturing, in particular to an analysis method of the influence of ultrasonic shock treatment on residual stress of a metal component formed by laser selective melting. Firstly, the finite element software Simufact.Additive is used to simulate the laser selective melting forming process of aluminum alloy sheet, and cooled in Simufact.Forming, the distribution of manufacturing residual stress and deformation is obtained, Then, based on the residual stresses and deformations produced in the laser selective melting process, the ultrasonicimpact process is simulated by using the input stress and deformation mesh of Msc. Marc, so as to analyze the physical process of the whole ultrasonic impact on the metal components formed by laser selective melting. The method utilizes Msc. Marc power transient module to carry out ultrasonic impact simulation, the stress field of laser selective melting forming is taken as the initial condition,the calculated results are in good agreement with the measured results of residual stress tester in the numerical value and variation trend, and the purpose of optimizing the impact process parametersand exploring its mechanism is achieved.

Description

technical field [0001] The invention belongs to the field of additive manufacturing, and in particular relates to an analysis method for the influence of ultrasonic impact treatment on the residual stress of a metal component formed by laser selective melting. Background technique [0002] Aluminum alloy has good mechanical properties and processing properties. It has the advantages of low density, good corrosion resistance and wear resistance, high strength and rigidity, and strong impact resistance. It has a wide range of applications in aerospace, automobile manufacturing, shipbuilding and marine engineering equipment. Applications. The laser selective melting forming processing method can produce components of any shape without being limited by the complexity of the part structure. In recent years, the laser selective melting forming technology of aluminum alloy parts has been more and more applied. [0003] Due to the continuous and rapid melting and solidification ch...

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/23
Inventor 邢晓冬段晓明姜风春周长平王振李鹏苏艳蒋婷婷
Owner HARBIN ENG UNIV
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