Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Contrast test method for evaluating stress corrosion cracking sensitivities of aluminum alloy fasteners

A stress corrosion and comparative test technology, which is applied in the direction of weather resistance/light resistance/corrosion resistance, test sample preparation, sampling, etc., can solve the problems of low test efficiency and achieve good reliability, high test efficiency, and high-efficiency stress resistance The effect of corrosive ability

Inactive Publication Date: 2019-03-19
河南航天精工制造有限公司
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a comparative test method for evaluating the stress corrosion susceptibility of aluminum alloy fasteners, to solve the problem of low test efficiency of existing test methods

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Contrast test method for evaluating stress corrosion cracking sensitivities of aluminum alloy fasteners
  • Contrast test method for evaluating stress corrosion cracking sensitivities of aluminum alloy fasteners
  • Contrast test method for evaluating stress corrosion cracking sensitivities of aluminum alloy fasteners

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0019] Embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0020] In the following examples, the stress corrosion test device is used to carry out relevant tests, and the structural schematic diagram of the stress corrosion test device is as follows Figure 1-Figure 3 As shown, the stress corrosion sample device includes a water bath box 1 and a corrosion medium container 2 arranged in the water bath box 1. The inner cavity of the corrosion medium container 2 is used to hold the corrosion medium used in the stress corrosion test, and the corrosion medium container 2 adopts thermal conductivity. Made of good materials, such as glass, steel materials, etc. A liquid level observation window is provided on the corrosive medium container 2 to facilitate the observation of the change of the liquid level in the corrosive medium container 2, so as to supplement water and other components according to the actual situatio...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a contrast test method for evaluating stress corrosion cracking sensitivities of aluminum alloy fasteners. The method comprises the following steps: 1) respectively applying specified loads to different aluminum alloy fasteners, immersing the fasteners in a corrosive medium, wherein different aluminum alloy fasteners and the aluminum alloy fasteners and inner walls of a container filled with the corrosive medium do not contact with one another, and stress corrosion testing is performed at a temperature of 80+ / -2 DEG C; and 2) contrasting surface states of the differentaluminum alloy fasteners, wherein an aluminum alloy fastener on which crack defects occur first is considered to have high stress corrosion cracking sensitivity, and an aluminum alloy fastener on which crack defects occur later is considered to have low stress corrosion cracking sensitivity. According to the method disclosed by the invention, the different aluminum alloy fasteners are subjected to high-temperature accelerated stress corrosion test by sample pieces under the equal conditions, and stress corrosion resistance of the different sample pieces can be rapidly screened. The contrast test method has the characteristics of being high in test efficiency and excellent in test result reliability, and is capable of rapidly and effectively evaluating stress corrosion resistance of the aluminum alloy fasteners in different states.

Description

technical field [0001] The invention belongs to the field of stress corrosion tests, in particular to a comparative test method for evaluating the stress corrosion sensitivity of aluminum alloy fasteners. Background technique [0002] Aluminum alloy has the characteristics of good corrosion resistance, high specific strength, and good fatigue resistance, and is widely used in various industries. Aluminum alloy is the main structural material of aircraft (especially civil aircraft). According to statistics, its usage accounts for about 80% of the weight of the aircraft structure, among which high-strength aluminum alloys 7050 and 7075 are the main materials. For example, 7075 materials are mainly used for the main stressed parts of aircraft structures, such as girders, long trusses, bulkheads, wing ribs, joints, landing gear parts, fasteners, etc. [0003] While high-strength aluminum alloys are widely used, it cannot be ignored that their stress corrosion resistance is poor...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G01N17/00G01N1/28
CPCG01N1/286G01N17/006
Inventor 李旭健李祥军程全士胡庆宽孙晓军冯德荣石大鹏高靖靖郝景涛周玉宝王文超余静
Owner 河南航天精工制造有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com