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

A high-strength and tough aluminum alloy with various mixed crystal structures induced by micro-shear bands and its preparation method and application

A technology of micro-shearing and aluminum alloy, which is applied in the direction of metal rolling and process efficiency improvement, can solve the problems of slowing performance improvement, low research alloy degree, and rising cost, and achieves low material cost and simple experimental scheme , The effect of reducing production costs

Active Publication Date: 2022-05-27
HOHAI UNIV +3
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The increasingly complex alloy composition not only increases the cost of materials and slows down the performance improvement, but also makes subsequent recycling very difficult, resulting in serious waste of resources. Elemental Al-Zn(-Mg) Alloy is Imminent

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
  • A high-strength and tough aluminum alloy with various mixed crystal structures induced by micro-shear bands and its preparation method and application
  • A high-strength and tough aluminum alloy with various mixed crystal structures induced by micro-shear bands and its preparation method and application
  • A high-strength and tough aluminum alloy with various mixed crystal structures induced by micro-shear bands and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Prepare Al-2Zn high strength and toughness alloy profiles with a length of 10 cm and a thickness of 2 mm.

[0034] A micro-shear belt induces the formation of a high-strength and tough aluminum alloy with a variety of mixed crystal structures, including multiple micro-shear belts, a large number of isoaxial nanocrystals and layered nanocrystals around the micro-shear belt, and a micro-grained crystal-free zone retains microcrystals to form a mixed-crystal structure structure in which isoaxial nanocrystals, layered nanocrystals and microcrystals coexist.

[0035] The aluminum alloy is An Al-Zn alloy, the zinc content in the Al-Zn alloy is 2wt%, and the rest is aluminum.

[0036] The preparation method of a micro-shear belt induces the formation of a high-strength and tough aluminum alloy with a variety of mixed crystal structures as follows:

[0037](1) High-temperature homogeneous solid solution treatment: the homogenization treatment of casting Al-2Zn insulation at 475 °C ...

Embodiment 2

[0043] Prepare Al-5Zn-1Mg high strength and toughness alloy profiles with a length of 10 cm and a thickness of 2 mm.

[0044] A micro-shear belt induces the formation of a high-strength and tough aluminum alloy with a variety of mixed crystal structures, including multiple micro-shear belts, a large number of isoaxial nanocrystals and layered nanocrystals around the micro-shear belt, and a micro-grained crystal-free zone retains microcrystals to form a mixed-crystal structure structure in which isoaxial nanocrystals, layered nanocrystals and microcrystals coexist.

[0045] The aluminum alloy is Al-Zn-Mg alloy, the zinc content in The Al-Zn-Mg alloy is 5wt, the magnesium content is 1wt, and the rest is aluminum.

[0046] Its preparation method is as follows:

[0047] (1) High-temperature homogeneous solid solution treatment: the homogenization treatment of casting Al-5Zn-1Mg at 475 °C for 6h to eliminate macroscopic segregation of elements in the cast structure and achieve high sol...

Embodiment 3

[0053] Prepare Al-6Zn-1Mg high strength and toughness alloy profiles with a length of 10 cm and a thickness of 2 mm. The aluminum alloy is Al-Zn-Mg alloy, Al-Zn-Mg alloy has a zinc content of 6wt, a magnesium content of 1wt, and the rest is aluminum.

[0054] Its preparation method is as follows:

[0055] (1) High-temperature homogeneous solid solution treatment: the homogenization treatment of casting Al-6Zn-1Mg at 475 °C for 6h to eliminate macroscopic segregation of elements in the cast structure and achieve high solid solution of alloying elements;

[0056] (2) The alloy obtained in step (1) is directly extruded for 4 consecutive times ECAP at homogenization temperature;

[0057] (3) Multi-channel room temperature rolling: the above-mentioned extruded samples are rolled at multiple times at room temperature, of which the single-channel down pressure is 5%; the total down pressure is 50%; there is no obvious micro-crack on the sample surface;

[0058] (4) Artificial aging: 20h ...

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
thicknessaaaaaaaaaa
sizeaaaaaaaaaa
sizeaaaaaaaaaa
Login to View More

Abstract

The invention discloses a high-strength and tough aluminum alloy with various mixed crystal structures induced by micro-shear bands, including multiple micro-shear bands, a large number of equiaxed nanocrystals and layered nanocrystals around the micro-shear bands, and no micro-shear The micro-crystals are retained in the zone, forming a mixed crystal structure in which equiaxed nano-crystals, layered nano-crystals and micro-crystals coexist. The invention also discloses a preparation method of a high-strength and tough aluminum alloy with various mixed crystal structures induced by micro-shear bands and its application in light weight and high service life materials. The invention can ensure that the simple binary Al-Zn or ternary Al-Zn-Mg alloy has excellent comprehensive mechanical properties by controlling the room temperature rolling process and the subsequent aging process, and the experimental scheme is simple, easy to operate, and there is no expensive and rare alloy Elements, while reducing production costs, it is more convenient to recycle and reuse alloys, save resources, reduce carbon emissions, and have important applications in the field of industrial profiles with high cost performance requirements.

Description

Technical field [0001] The present invention relates to a micro-shear tape to induce the formation of a variety of mixed crystal structure of high-strength and tough aluminum alloy and preparation method and application thereof, belongs to the field of aluminum alloy material preparation and processing technology. Background [0002] Al-Zn-Mg-(Cu)) aluminum alloy is a strategic basic material urgently needed for lightweight design and high service life in a number of strategic emerging industries such as aerospace, advanced equipment manufacturing, rail transit, 5G applications and new infrastructure. For this type of alloy system, the comprehensive mechanical properties are often improved by alloying (Zn, Mg, Cu, Zr, Ti, V, Sc, etc.), and then matching to deformation heat treatment, regression and aging. The increasingly complex alloy composition not only makes the cost of the material continue to rise, the performance improvement is slowing down, but also makes the subsequent r...

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): C22C21/10C22F1/053C21D1/26B21B3/00C21D8/02
CPCC22C21/10C22F1/053C21D1/26B21B3/00C21D8/0236C21D8/0221C21D8/0247C22C2200/04C22C2200/00B21B2003/001Y02P10/20
Inventor 吴玉娜张权刘欢梅小明王胜青徐旭范付军徐正祥王爱民
Owner HOHAI UNIV
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