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

Mechanical training method for Ti-Ni marmem

A technology of memory alloy and training method, which is applied in the field of shape memory alloy, can solve the problems of phase transition temperature instability, material damage, and high cost, and achieve the effects of shortening training time, reducing training cost, and saving energy

Inactive Publication Date: 2004-02-25
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Utilizing the characteristics of shape memory alloys undergoing phase transformation when heated, and being able to remember and restore the original shape, people hope to make smart components that integrate perception and drive. It has small size, low cost, simple structure, and can replace complex electromechanical systems. It has the advantages of application in complex environments; however, the temperature at which the phase transition of shape memory alloys occurs is unstable, which seriously affects the reliability of the application of memory alloy products and restricts the commercial application of memory alloys. The problem of temperature stability has become a bottleneck restricting the popularization and application of memory alloy products
[0004] At present, the thermomechanical training method is mainly used in the world to obtain the stable phase transition temperature of the memory alloy. This method stretches the memory alloy wire to a certain amount of deformation, and repeatedly heats and cools it in this state, that is, the phase transition occurs repeatedly. The main disadvantage of this method is that the alloy material must be repeatedly heated and cooled, the training process is long, the cost is high, and the material will be damaged when the deformation is large, which is not suitable for industrial production.

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
  • Mechanical training method for Ti-Ni marmem
  • Mechanical training method for Ti-Ni marmem
  • Mechanical training method for Ti-Ni marmem

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Taking Ti-49.6Ni shape memory alloy as an example, the material is vacuum induction smelted into an ingot of Ti-49.6% Ni alloy with an ingot weight of 10kg; after diffusion (homogenization) annealing at 900°C for 3 hours, hot rolling A rod with a diameter of 11 mm is processed at 750°C for 30 minutes, aged at 400°C for 1 hour, and cooled to room temperature in air. The material is in the martensite phase at room temperature, and its tensile yield strength at room temperature is 187 MPa. figure 1 Shown is the relative resistance-temperature curve of the material after solid solution and aging treatment. It can be seen from the figure that the martensitic transformation temperature measured twice in a row is unstable; the plastic strain amplitude is controlled, and the room temperature is loaded symmetrically in tension and compression. Plastic strain amplitude Δε p =5×10 -4 , the load ratio λ=-1, the waveform is a triangular wave, the frequency is 0.5Hz, and the plastic...

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

PropertyMeasurementUnit
tensile yield strengthaaaaaaaaaa
yield strengthaaaaaaaaaa
Login to View More

Abstract

The present invention relates to shape memory alloy, and is especially the mechanical training method for Ti-Ni shape memory alloy. By means of stress control or strain control mode and through symmetrical pulling and pressing to load to reach the saturated circulation stress times at room temperature. Ti-Ni shape memory alloy with stable martensite phase change temperature is obtained. The present invention has short training time and no damage to the material, can save power and lower training cost, and is suitable for industrial application.

Description

technical field [0001] The invention relates to a shape-memory alloy, in particular to a mechanical training method for a titanium-nickel shape-memory alloy. Background technique [0002] The shape memory effect means that the alloy material undergoes martensitic phase transformation, deforms at a low temperature (martensite), and is heated to a high temperature (parent phase), and the alloy material returns to its original shape before deformation. Among the many shape memory alloys, TiNi alloy has been widely studied and applied for its good memory effect, mechanical properties, wear resistance and corrosion resistance, and is currently the most successful and important memory alloy. [0003] Utilizing the characteristics of shape memory alloys undergoing phase transformation when heated, and being able to remember and restore the original shape, people hope to make smart components that integrate perception and drive. It has small size, low cost, simple structure, and can...

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
Patent Type & Authority Patents(China)
IPC IPC(8): C22C14/00C22C19/00
Inventor 胡强金伟曹名洲李守新
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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