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A Method for Determining the Optimum Microstructure State of Armor-piercing Resistance of Metallic Materials

A microstructure and metal material technology, applied in the analysis of materials, using stable tension/pressure to test the strength of materials, testing the hardness of materials, etc., can solve the problems of complex armor-piercing performance testing and lack of effective material selection criteria, etc., to achieve The effect of saving experimental time and cost

Active Publication Date: 2021-08-31
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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Problems solved by technology

[0004] Aiming at the problems in the prior art that the armor-piercing performance test of metal protective materials is complex and lacks effective material selection criteria, the purpose of the present invention is to provide a method for determining the optimal microstructure state of armor-piercing resistance of metal materials, which combines Based on the quasi-static and dynamic compression and indentation experiments, based on the different strain rate sensitivities of strength and hardness and different dominant deformation mechanisms, a new criterion is proposed to predict the material microstructure with the best armor-piercing performance of metallic materials. Organizational state, this criterion can also be used as the basis for the selection of armor protection materials

Method used

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  • A Method for Determining the Optimum Microstructure State of Armor-piercing Resistance of Metallic Materials
  • A Method for Determining the Optimum Microstructure State of Armor-piercing Resistance of Metallic Materials
  • A Method for Determining the Optimum Microstructure State of Armor-piercing Resistance of Metallic Materials

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Embodiment 1

[0033] In this example, AISI 4340 steel is used as an example to determine the best microstructure method for its armor-piercing resistance. The specific steps are as follows:

[0034] Step 1: Perform different heat treatments on the original AISI 4340 steel to obtain 4 4340 steels with the same chemical composition but different microstructures (that is, different strength and toughness matching), numbered SAQ, S240, S420 and S500;

[0035] Step 2: Conduct quasi-static compression, tension and Vickers indentation experiments at room temperature with a tension and compression strain rate of 5 × 10 -4 the s -1 , the measured quasi-static compressive yield strength σ scs , tensile yield strength σ sts , tensile strength σ UTS and hardness HV (as shown in Table 1);

[0036] Step 3: Carry out room temperature high-speed compression and Vickers indentation experiments, and the strain rate of dynamic indentation experiments is 10 3 the s -1 , since the strain rate 10 was not m...

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Abstract

The invention discloses a method for determining the optimal microstructure state of armor-piercing resistance of metal materials, and belongs to the technical field of high-speed fracture of metal materials. The method includes: (1) obtaining a series of metal materials with the same chemical composition but different microstructures through different treatments, (2) obtaining the quasi-static compressive yield strength σ through quasi-static compression experiments and Vickers indentation experiments scs and hardness HV, (3) The dynamic compressive yield strength σ was obtained by high-speed compression test and Vickers indentation test dcs and dynamic hardness DHV, (4) Determine the optimal microstructure state for resistance to armor piercing (that is, resistance to high-speed perforation) according to the internal relationship between strength and hardness under dynamic and quasi-static conditions. The present invention can simply and conveniently predict the microstructure state (or match the strength and toughness) with the optimal armor-piercing performance, save the time and cost of armor-piercing experiments, and provide a fast and reliable material selection method, which is beneficial to The design of component materials in the field of high-speed engineering has a guiding role.

Description

technical field [0001] The invention relates to the technical field of high-speed fracture of metal materials, in particular to a method for determining the optimal microstructure state of metal materials for armor-piercing resistance. Background technique [0002] As metal materials are more and more widely used in high-speed engineering fields, such as explosive forming, space protection collision, armor-piercing performance of protective materials, etc. As a typical application of high-speed engineering—the armor-piercing performance of protective materials, on the one hand, traditional evaluation methods require cumbersome ballistic experiments, which are time-consuming and laborious [M.A. Meyers, Dynamic behavior of materials [M], John Wiley & Sons, 1994.]. On the other hand, due to the basic mechanical properties of materials, such as strength, hardness or toughness, they can often be used as indicators for evaluating the processing and service performance of materials...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/08G01N3/42
CPCG01N3/08G01N3/42G01N2203/0017G01N2203/0019G01N2203/0078G01N2203/0098
Inventor 屈瑞涛吴少杰张哲峰
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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