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High-strength pulse-current pretreatment method for improving mechanical property of non-crystal alloy

A technology of amorphous alloy and pulse current, applied in the field of improving the mechanical properties of amorphous alloy materials, bulk amorphous alloy mechanical properties and improving mechanical properties, can solve the problems of poor ductility, unseen, application limitations, etc., to achieve The effect of improving mechanical properties

Inactive Publication Date: 2006-08-09
TSINGHUA UNIV
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AI Technical Summary

Problems solved by technology

[0003] Although bulk amorphous alloys have high strength, their ductility is poor, and the plastic deformation of most known bulk amorphous alloys is less than about 2%, which limits the application of such materials
At present, there is no public report on improving the mechanical properties of amorphous alloys by treating bulk amorphous alloys with high-intensity pulse current

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0026] 1. ZrTiCuNiBe amorphous alloy

[0027] (1) Using high-intensity pulse current to Zr 41.3 Ti 14.2 Cu 12.8 Ni 10.3 be 21.4 The bulk amorphous alloy is treated to significantly improve the mechanical properties of the bulk amorphous alloy, the strength value increases by more than 20%, and the compression ductility increases by nearly 100%. The technical and process parameters used are:

[0028] 1) Current density: j=700±100A / mm 2

[0029] 2) Current pulse width: μ=30~60μs

[0030] 3) Current pulse frequency: f=40~70Hz

[0031] 4) Processing time: 8±3 minutes

[0032] 5) The temperature is controlled between 120 degrees and 250 degrees.

[0033] In the above treatment, when the conditions of 1), 2) and 4) are the same, in 3): when f=40Hz is used, the strength value increases by more than 10%, and the maximum increase of compressive ductility is nearly 20%; when f=50Hz is used When f = 70Hz, the strength value increases by more than 20%, and the maximum compressi...

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PUM

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Abstract

This invention relates to the dynamic performance of block non-crystal alloys and a method for improving it characterizing in applying high strength pulse current to process the block non-crystal alloy, connecting the output of a power supply with a sample of due processed block non-crystal alloys, in which, the current density is: j=50-4000A / mm2, the current pulse width: mum=10-200mums, pulse frequency: f=1-500Hz, process time: 2 seconds-10hours and the sample temperature: T C22F 3 / 00 C22C 45 / 00 0 4 2 2006 / 3 / 3 1814851 2006 / 8 / 9 000000000 Tsinghua Univ. Beijing 100084 Yao Kefu

Description

Technical field: [0001] The invention belongs to the field of amorphous metal materials. It particularly relates to the mechanical properties of bulk amorphous alloys and a method for improving the mechanical properties, and is a new method capable of improving the mechanical properties of amorphous alloy materials. Background technique: [0002] Bulk amorphous alloy (also known as bulk amorphous alloy or bulk metallic glass) is a new type of alloy material with many special and excellent properties developed in the past 10 years. Etc. Traditional low-dimensional amorphous alloy materials have a macroscopic geometric size of about 1mm or more. Because bulk amorphous alloys have strength, corrosion resistance and other functional properties far superior to those of crystalline alloys with the same composition, bulk amorphous alloys have significant application prospects. [0003] Although bulk amorphous alloys have high strength, their ductility is poor, and the plastic def...

Claims

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Application Information

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IPC IPC(8): C22F3/00C22C45/00
Inventor 姚可夫
Owner TSINGHUA UNIV
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