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Method for evaluating mechanical properties of ultra-thin Ti / Al two-layer density gradient material

A gradient material and evaluation method technology, applied in the direction of applying stable tension/pressure to test the strength of materials, analyzing materials, strength characteristics, etc., can solve the problem of large influence of defects, low reliability of multi-layer gradient materials, and inability to reflect multi-layer gradients Material tensile strength and other issues to achieve the effect of saving testing costs and ensuring accuracy

Active Publication Date: 2018-12-25
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Shear strength test samples such as figure 1 The edge shear test is shown. This method can only reflect the interfacial bonding strength of the interface where two adjacent materials are combined together in the multilayer gradient material, but cannot reflect the overall tensile strength of the multilayer gradient material.
Microhardness testing belongs to the analysis of local microscopic properties of materials, which is greatly affected by local defects of materials, so the reliability of the evaluation of the overall mechanical properties of multi-layer gradient materials is low

Method used

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  • Method for evaluating mechanical properties of ultra-thin Ti / Al two-layer density gradient material
  • Method for evaluating mechanical properties of ultra-thin Ti / Al two-layer density gradient material
  • Method for evaluating mechanical properties of ultra-thin Ti / Al two-layer density gradient material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Ti / Al (thickness 0.3mm / 0.2mm) two-layer gradient material tensile strength test

[0037] according to figure 2 The process shown in the preparation of Ti / Al two-layer gradient material: first process a series of titanium plates with different thicknesses of diameter Φ40mm (thicknesses are 0.45mm, 0.48mm, 0.51mm, 0.54mm, 0.57mm, 0.6mm, 0.9mm, 1.2mm, 1.5mm, 1.8mm, 2.1mm) and aluminum plate (the thickness is 0.3mm, 0.32mm, 0.34mm, 0.36mm, 0.38mm, 0.4mm, 0.6mm, 0.8mm, 1.0mm, 1.2mm, 1.4mm ). The titanium plate is a TC4 titanium alloy plate that meets the standard composition, and the aluminum plate is a 2A12-T4 aluminum alloy that meets the standard composition.

[0038] Secondly, grind and polish the surfaces to be welded of a series of titanium plates and aluminum plates with a diameter of Φ40mm of different thicknesses to remove the oxide film on the surface of the plates. Sandpapers of 80 mesh, 240 mesh, 600 mesh, 1000 mesh, and 1500 mesh were used in turn to polish ...

Embodiment 2

[0041] Ti / Al (thickness 0.2mm / 0.3mm) two-layer gradient material tensile strength test

[0042] according to figure 2 The process shown in the preparation of Ti / Al two-layer gradient material: first process a series of titanium plates with different thicknesses of diameter Φ40mm (thicknesses are 0.3mm, 0.32mm, 0.34mm, 0.36mm, 0.38mm, 0.4mm, 0.6mm, 0.8mm, 1.0mm, 1.2mm, 1.4mm) and aluminum plate (the thickness is 0.45mm, 0.48mm, 0.51mm, 0.54mm, 0.57mm, 0.6mm, 0.9mm, 1.2mm, 1.5mm, 1.8mm, 2.1mm ). The titanium plate is a TC4 titanium alloy plate that meets the standard composition, and the aluminum plate is a 2A12-T4 aluminum alloy that meets the standard composition.

[0043] Secondly, grind and polish the surfaces to be welded of a series of titanium plates and aluminum plates with a diameter of Φ40mm of different thicknesses to remove the oxide film on the surface of the plates. Sandpapers of 80 mesh, 240 mesh, 600 mesh, 1000 mesh, and 1500 mesh were used in turn to polish ...

Embodiment 3

[0046] Ti / Al (thickness 0.2mm / 0.4mm) two-layer gradient material tensile strength test

[0047] according to figure 2 The process shown in the preparation of Ti / Al two-layer gradient material: first process a series of titanium plates with different thicknesses of diameter Φ40mm (thicknesses are 0.3mm, 0.32mm, 0.34mm, 0.36mm, 0.38mm, 0.4mm, 0.6mm, 0.8mm, 1.0mm, 1.2mm, 1.4mm) and aluminum plate (the thickness is 0.6mm, 0.64mm, 0.68mm, 0.72mm, 0.76mm, 0.8mm, 1.2mm, 1.6mm, 2.0mm, 2.4mm, 2.8mm ). The titanium plate is a TC4 titanium alloy plate that meets the standard composition, and the aluminum plate is a 2A12-T4 aluminum alloy that meets the standard composition.

[0048] Secondly, grind and polish the surfaces to be welded of a series of titanium plates and aluminum plates with a diameter of Φ40mm of different thicknesses to remove the oxide film on the surface of the plates. Sandpapers of 80 mesh, 240 mesh, 600 mesh, 1000 mesh, and 1500 mesh were used in turn to polish t...

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Abstract

The invention provides a testing method for the tensile strength of an ultra-thin Ti / Al two-layer gradient material. The testing method comprises the following steps of: step 1, designing an original sample, preparing the original sample, recording the thickness and preparation process of each layer of the original sample at the same time, and proportionally amplifying the thickness of each layer of the original sample to obtain a series of amplified samples under the same preparation condition as the original sample; and step 2, testing the tensile strength of the series of amplified samples, fitting testing results to obtain a fitting equation, and calculating the tensile strength of the original sample according to the thickness of the original sample after the fitting equation is obtained. According to the testing method for the tensile strength of the ultra-thin Ti / Al two-layer gradient material, welding conditions and the difficulty of testing an ultra-thin sample are comprehensively considered, and the scientific detection of the mechanical properties of the ultra-thin material is realized for the first time by optimizing the conditions of the amplified samples.

Description

Technical field: [0001] The invention relates to a method for evaluating the tensile strength of an ultra-thin Ti / Al two-layer density gradient material, which can evaluate the overall tensile strength of the ultra-thin Ti / Al two-layer gradient material including interface bonding strength and matrix strength . Background technique: [0002] Density gradient material is a new type of composite material whose composition and structure change continuously along the thickness or diameter direction of materials with different properties. From the perspective of material combination, gradient materials can be divided into metal / alloy, metal / non-metal, metal / ceramic and other combinations. With the rapid development of modern science and technology, intelligent manufacturing has become the direction of development, and high-quality, multi-functional materials are favored by aerospace and other industries. In practical materials, due to the characteristics of gradient materials, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/08
CPCG01N3/08G01N2203/0017G01N2203/0278
Inventor 马运柱王涛刘文胜刘超刘阳伍镭颜焕元
Owner CENT SOUTH UNIV
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