Microcosmic phase field analysis method in age forming and pre-ageing process

An aging forming and pre-aging technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as the inability to capture the instantaneous dynamic tissue evolution of pre-aging-aging forming, and the lack of advantages in scientific principle research.

Inactive Publication Date: 2015-04-22
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology

However, experimental methods cannot capture the transient dynamic tissue evolution of pre-aging-aging fo...

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  • Microcosmic phase field analysis method in age forming and pre-ageing process
  • Microcosmic phase field analysis method in age forming and pre-ageing process
  • Microcosmic phase field analysis method in age forming and pre-ageing process

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Embodiment Construction

[0029] The present invention will be further described below in conjunction with the examples.

[0030] figure 1It is the technical roadmap of the present invention. The invention utilizes the microscopic phase field method that couples the macroscopic aging forming stress and the nanoscopic interface mismatch stress, according to the idea of ​​"controlling the initial structure by pre-aging, and then optimizing the structure evolution and final structure of the whole process of aging forming", through pre-aging To achieve the purpose of eliminating directional arrangement and coarsening, and obtaining diffuse distribution and cross-arranged age-forming tissue. The above objectives can be achieved from three aspects through two steps. First, the stability, dispersibility, arrangement and precipitation mechanism of the pre-aging tissue are controlled by controlling the parameters of the pre-aging process. Secondly, study the influence of the stability, dispersibility, arrange...

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Abstract

The invention discloses a microcosmic phase field analysis method in the age forming and pre-ageing process. A phase field model with the atomic scales of a macroscopic/nano stress field coupled is adopted, pre-ageing tissue hereditary of age forming is simulated, the influence rule of a pre-ageing tissue forming mechanism to a pre-ageing tissue structure is analyzed according to different precipitation tissue transformation mechanisms, the influence of the pre-ageing tissue forming mechanism and the mechanism used for transforming pre-ageing tissue to age forming tissue on the hereditary effect is obtained, and the response relation of the age forming tissue dispersity and layout is obtained. The method includes the step of first pre-ageing tissue control and the step of the hereditary effect of the second pre-ageing tissue on the age forming tissue. According to the method, the age forming precipitated phase early-stage shape is changed fundamentally, hence, age forming ending tissue is optimized, crystalline grain largeness and orientation arrangement are eliminated, and the tissue shape of dispersion distribution and cross arrangement with the refined crystalline strengthening effect and the dispersion strengthening effect is achieved.

Description

technical field [0001] The invention relates to computer simulation and structure optimization in the field of plastic forming, in particular to a microcosmic phase field analysis method for aging forming pre-aging process. technical background [0002] The superposition of the macroscopic elastic stress and the nanoscopic interface mismatch stress of aging forming makes the direction of the lowest interface mismatch elastic stress directional, and induces the nucleation, growth, and directional coarsening of the 2000 series θ″, θ′, S″, and S′ phases , leading to performance anisotropy, reducing the effect of dispersed dislocation movement in the precipitated phase, causing coplanar slip, causing microscopic stress concentration, reducing strength and fracture toughness, etc. Combining static pre-aging with aging forming, the cross-arrangement of the θ" phase of pre-aging is inherited from the aging forming process, and it has a good effect in eliminating the oriented arrang...

Claims

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Application Information

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IPC IPC(8): G06F19/00
Inventor 张静陈铮王永欣卢艳丽
Owner NORTHWESTERN POLYTECHNICAL UNIV
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