Unlock instant, AI-driven research and patent intelligence for your innovation.

A method for improving the strength of single-phase high-entropy alloys by heat treatment combined with plastic deformation

A high-entropy alloy and plastic deformation technology, applied in the field of improving the strength of high-entropy alloys, combining heat treatment and plastic deformation to improve the strength of single-phase high-entropy alloys, can solve the problem of alloy plasticity, toughness decline, strength, and hardness. Stable temperature Problems such as range limitation, to achieve the effect of increased strength, easy operation, and broadened application range

Active Publication Date: 2019-03-05
NANJING INST OF TECH
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the work hardening brought about by plastic deformation can obviously improve the high-entropy alloy of pure solid solution phase structure, but just like the effect of work hardening on traditional alloys, this strengthening method makes the plasticity and toughness of the alloy decrease obviously, and the strength and hardness remain. The stable temperature range is also limited, which limits the possible application of high-entropy alloys in the field of high-temperature structures

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 method for improving the strength of single-phase high-entropy alloys by heat treatment combined with plastic deformation
  • A method for improving the strength of single-phase high-entropy alloys by heat treatment combined with plastic deformation
  • A method for improving the strength of single-phase high-entropy alloys by heat treatment combined with plastic deformation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Will Al 0.5 CrCuFeNi 2 The as-cast sample was subjected to aging treatment in a resistance furnace, the aging temperature was 600°C, the holding time was 2 hours, and then air-cooled. The microstructure was as follows: image 3 As shown, the sample is then rolled, with a deformation of 60%, and the microstructure after compression is as follows Figure 4 As shown, the measured microhardness value is 341.6HV, which is 53.3% higher than that before treatment, and the effect is remarkable.

Embodiment 2

[0031] Will Al 0.5 CrCuFeNi 2 The as-cast sample was subjected to aging treatment in a resistance furnace, the aging temperature was 750°C, the holding time was 2.5 hours, and then air-cooled. The microstructure was as follows: Figure 5 As shown, the sample is then subjected to rolling treatment, the deformation is 60%, and the measured hardness value is 403.8HV, which is 81% higher than that before treatment.

Embodiment 3

[0033] Will Al 0.5 CrCuFeNi 2 The as-cast sample is kept at 200°C for 5 hours, taken out and air-cooled, and then rolled and compressed with a deformation of 80%. After treatment, the sample can be placed at 180°C for 2 hours for stress relief annealing. In order to reduce the residual stress, the high-entropy alloy increases the strength by 95% while ensuring the plasticity.

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
microhardnessaaaaaaaaaa
microhardnessaaaaaaaaaa
hardnessaaaaaaaaaa
Login to View More

Abstract

The invention discloses a method for improving the strength of a single-phase high-entropy alloy by combining heat treatment with plastic deformation, and belongs to the technical field of strengthening and modification of high-entropy alloys. Al 0.5 CrCuFeNi 2 The high-entropy alloy is treated by a combination of aging treatment and rolling compression deformation. The heat treatment is aging treatment. The high-entropy alloy sample is subjected to aging treatment. The aging temperature is 200-950°C, and the holding time is 0.5-5h. After air cooling; the plastic deformation is rolling compression deformation, and its deformation amount is 30%-80%, which can significantly improve the strength and hardness of the high-entropy alloy while ensuring its plasticity. The method provided by the invention can increase the strength of the high-entropy alloy by 10%-95% while ensuring the plasticity, and its comprehensive mechanical properties are excellent, which broadens the application range of the high-entropy alloy; the invention provided by the invention is easy to operate and has strong feasibility. The effect is remarkable.

Description

technical field [0001] The invention belongs to the technical field of strengthening modification of high-entropy alloys, and in particular relates to a method for improving the strength of high-entropy alloys, in particular to a method for improving the strength of single-phase high-entropy alloys by combining heat treatment and plastic deformation. Background technique [0002] High-entropy alloys are formed by melting, sintering or other methods of combining n (n≥5) metals or non-metals in equimolar or unequal molar ratios (the atomic percentage of each component does not exceed 35%). characteristic material. Because there are many metal elements in the alloy, the degree of disorder is large, and the high-entropy effect promotes the mixing of elements, making a variety of main elements tend to arrange in disorder to form simple body-centered cubic or face-centered cubic crystals, or even amorphization, while inhibiting formation of brittle intermetallic compounds. There...

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): C22F1/00
CPCC22F1/00
Inventor 皮锦红于昌富严亚楠汪荣香杨文静
Owner NANJING INST OF TECH