Constitutive behavior construction method for multiphase metal material for high-speed deformation process

A technology of metal materials and construction methods, which is applied in the field of processing and high-speed deformation of multi-phase metal crystal materials, can solve problems such as high temperature, large strain rate, complex phase composition, etc., and achieve the effect of reducing test costs and improving efficiency

CN111145842AActive Publication Date: 2020-05-12XI AN JIAOTONG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2020-05-12

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Abstract

The invention discloses a rapid calculation method for constitutive behaviors of a multi-phase metal material for a high-speed deformation process. The method comprises the steps: predicting the mechanical behavior of each single pure phase in the multi-phase material through a crystal plasticity finite element method, and then predicting the macroscopic constitutive behavior shown by the materialin the multi-phase state through metallographic structure measurement and proportional mixing methods. The method can accurately and quickly predict the mechanical behavior of a single phase of the material in a high strain rate state, so that the method can be suitable for deformation processes such as high-speed machining and forging of steel, titanium alloy and other materials with complex phase components. According to the method, the problem that for the same material, after different heat treatments, the mechanical properties are significantly changed due to microstructure changes and the mechanical behaviors of the material need to be measured again is solved, so the cost can be significantly reduced in industrial production practice, the simulation and analysis efficiency can be improved, and the method has important significance for computer-aided analysis and design of the part machining deformation process.
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Description

technical field

[0001] The invention belongs to the field of high-speed deformation and processing of multi-phase metal crystal materials, in particular to a method for constructing constitutive behavior of multi-phase metal materials facing high-speed deformation process. Background technique

[0002] The constitutive model is a mathematical model used to describe the response of the flow stress to the deformation state of the material under the applied boundary conditions. It can reflect the basic deformation state of the material. For understanding the deformation process of the material such as cutting and forging, it can be assisted by computer. Design is very important. At the same time, the microstructure of the material also has a very important impact on the macroscopic physical and mechanical properties. For the same material, different heat treatments will lead to different microstructures, which will lead to significant differences in the mechanical properties of...

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Embodiment Construction

[0036] The present invention is described in further detail below in conjunction with accompanying drawing:

[0037] The present invention is a method for constructing the constitutive behavior of multi-phase metal materials for high-speed deformation process, which specifically includes the following steps:

[0038] Step 1), obtaining the material structure information and basic physical parameters of the target multi-phase metal material;

[0039] The material structure information includes the phase composition unit of the target multi-phase metal material, and the phase composition unit specifically refers to the phase composition of the target multi-phase metal material; the basic physical parameters include the crystal structure and correlation of each pure phase state of the target multi-phase metal material. physical parameters;

[0040] Step 2), based on the material structure information and basic physical parameters obtained in step 1), through the crystal plastici...