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Method for estimating the deformability of metal material

Active Publication Date: 2020-09-11
JIHUA LAB
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

It can be seen that the SF method cannot predict the deformation ability of most metals very well.

Method used

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  • Method for estimating the deformability of metal material
  • Method for estimating the deformability of metal material
  • Method for estimating the deformability of metal material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0090] The metal material sample to be tested in this embodiment is a rolled AZ31 magnesium alloy plate.

[0091] The grain orientation distribution diagram obtained by calibration in step S1 is shown in figure 2 , it can be seen from the figure that most of the grains in the plate show the same color, that is, the orientation of the internal grains tends to be preferred, which is a typical basal texture orientation phenomenon of magnesium alloys.

[0092] image 3 is the true stress-strain curve of the sample obtained through experiments, where RDT is the tensile true stress-strain curve along the rolling direction, RDC is the compressive true stress-strain curve along the rolling direction, and TDT is the tensile true stress-strain curve along the width direction True stress-strain curve, TDC is the compressive true stress-strain curve along the width direction, and NDC is the compressive true stress-strain curve along the thickness direction; this figure shows that the dena...

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Abstract

The invention provides a method for estimating the deformability of a metal material. The method comprises the following steps: S1, calibrating an internal grain orientation distribution diagram of ato-be-measured metal material sample; S2, specifying an external load direction, extracting orientation data of each crystal grain from the orientation distribution diagram, and calculating an SF value of a main deformation mechanism in each crystal grain; S3, counting a deformation coordination factor between each crystal grain and the adjacent crystal grain; S4, calculating a comprehensive coordination coefficient of a slip system in each crystal grain according to the obtained SF value and the deformation coordination factor; and S5, calculating an average comprehensive coordination coefficient value according to the comprehensive coordination coefficients of the slip systems in all the crystal grains, and taking the average comprehensive coordination coefficient value as an index for estimating the deformability of the metal material in the specified external load direction. The method has the advantages of simple steps, low time and labor consumption and high estimation precision.

Description

technical field [0001] The invention relates to the field of material technology, in particular to a method for estimating the deformability of metal materials. Background technique [0002] Since the deformation ability of metal materials has a great influence on the processing performance of metal products such as stamping, forging, drawing, and extrusion, it is often necessary to pre-estimate the deformation ability of alternative materials when selecting materials. At present, there are two main methods for estimating the deformability of metal materials: the test method and the average Schmidt factor estimation method (hereinafter referred to as the SF method). [0003] The test method is to obtain the deformation curve of the material under the uniaxial stress state through the standard tension and compression test, and obtain the deformation curve of the material under the biaxial tension state or the tension-compression biaxial stress state through the punching cup t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G16C60/00G16C10/00G06F30/20G06F119/14G06F111/10
CPCG16C60/00G16C10/00G06F30/20G06F2119/14G06F2111/10
Inventor 夏大彪刘伟冯上样徐龙赵聪聪
Owner JIHUA LAB
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