CN105290617B - A kind of processing and treating method for making glassy metal produce stretching plastic - Google Patents
A kind of processing and treating method for making glassy metal produce stretching plastic Download PDFInfo
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- CN105290617B CN105290617B CN201510781725.3A CN201510781725A CN105290617B CN 105290617 B CN105290617 B CN 105290617B CN 201510781725 A CN201510781725 A CN 201510781725A CN 105290617 B CN105290617 B CN 105290617B
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Abstract
The present invention discloses a kind of processing and treating method for making glassy metal produce stretching plastic, comprises the following steps：Step 10, prepares one block of glassy metal of tabular；Step 20, in micro- hole that the upper and lower surface etched array of the glassy metal is arranged, micro- hole is perpendicular to the metal glass surface.The stretching plastic that the method for the present invention is excited does not rely on the effect of multiple shear bands, but the uniform rheological effect of glassy metal.The material near machining area is set to produce microcosmic gradient-structure by the fuel factor of laser, this structure can suppress the generation and extension of shear band.This method is easy to operate, is adapted to produce in enormous quantities, efficiency high.
Description
Technical field
The present invention relates to glassy metal manufacture field, and in particular to one kind can excite glassy metal to send out in a stretched state
The uniform rheology of life, produces the processing and treating method of stretching plastic.
Background technology
Glassy metal is that arrangement is in disordered state, similar to glass for metallic bond is combined between a kind of amorphous alloy, atom
Structure, therefore not only the characteristic with metal but also had the characteristic of glass.Special structure makes glassy metal show excellent power
Performance is learned, with superhigh intensity and elastic limit, high rigidity, high-fracture toughness, there are huge engineer applied potentiality.
At present, the engineer applied of block metal glass, the always weak restriction of Tensile plastic deformation ability.At room temperature,
The concentration of plastic deformation of block metal glass is in a width about 10nm shear bands, it is impossible to occur as crystalline metal uniform
Plastic deformation.Stress field in compression and flexural deformation can constrain the extension of shear band and excite the life of more shear bands
Into by the synergy of these shear bands, block metal glass shows plastic deformation under compression and bending load.But
In trending extensional tectonic stress field, moment crackle can be developed into after shear band generation, so block metal glass shows as often in stretching
Brittle fracture, this brittle fracture is often paroxysmal, do not have it is premonitory, directly constrain block metal glass engineering should
With.
At present, the stretching plastic that block metal glass is obtained at room temperature substantially with bending compression in plasticity as,
All it is to bring realization to be plastically deformed by multi-shearing, but shear band is a kind of blank of micro-crack, can quickly develop into and split
Line, occurs in that shear band means that material has begun to damage.Additionally, the width of shear band only has 10nm, shear band is depended on
And the plasticity for producing is a kind of highly non-uniform deformation.And real engineer applied is what is desired is that similar to crystalline metallic material
Uniform plastic deformation.
The content of the invention
The invention aims to provide a kind of method that block metal glass can be made to produce stretching plastic at room temperature.
Especially, it is of the invention that a kind of processing and treating method for making glassy metal produce stretching plastic is provided including as follows
Step：
Step 10, prepares one block of glassy metal of tabular；
Step 20, in micro- hole that the upper and lower surface etched array of the glassy metal is arranged, micro- hole is perpendicular to described
Metal glass surface.
Further, the described micro- hole in the step 20 utilizes pulse respectively in the glassy metal using laser equipment
Upper and lower surface process to be formed.
Further, in the step 20, on same plane it is described micro- hole with it is described it is micro- hole the distance between, with two
It is standard that the effective stress area in micro- hole contacts with each other, the surface in a diameter of described micro- hole in effective stress area circle it is straight
The twice in footpath.
Further, in the step 20, arranged in described micro- its latter transverse direction of hole adjacent in the vertical on same plane
Described micro- hole of row is located in previous transverse direction between two neighboring described micro- hole of arrangement on the extended line of center line respectively.
Further, micro- drawing cheated along the angle of inclination and the glassy metal in tilted direction solid matter face on same plane
The angle of inclination for stretching the plane of disruption is consistent.
Further, the depth in micro- hole is with the effective of two relative micro- holes of the glassy metal upper and lower surface
It is standard that stressed zone contacts with each other.
Further, the opening in micro- hole is circle, and to bottom is cheated, its circumference side is gradually to contract for the opening in micro- hole
Small oval parabola.
Further, the parabola is that arc is excessive in the junction at hole bottom.
Further, the parabolical computing formula is：
Wherein d is the surface diameter of a circle in micro- hole, and x spans are [- d/2, d/2].
Further, the laser parameter of the laser equipment is：Wavelength 515nm, mean power 30W, maximum impulse energy
150uJ, maximum impulse period L T.LT.LT 0.01ns, beam quality M2 ＜ 1.3, minimal repetition rate 200KHz, maximum repetition rate 800KHz.
The stretching plastic that the method for the present invention is excited does not rely on the effect of multiple shear bands, but glassy metal is uniform
Rheological effect.The material near machining area is set to produce microcosmic gradient-structure and the gradient on hole side to answer by the fuel factor of laser
Power area, suppresses the generation and extension of shear band.This method is easy to operate, is adapted to produce in enormous quantities, efficiency high.
Brief description of the drawings
Fig. 1 is processing and treating method schematic flow sheet according to an embodiment of the invention；
Fig. 2 is metallic glass structures schematic diagram according to an embodiment of the invention；
Fig. 3 is the structural representation in micro- hole shown in Fig. 2；
Fig. 4 is the effective stress area schematic diagram in micro- hole.
Specific embodiment
As shown in Figure 1, 2, the processing and treating method of one embodiment of the invention may include following steps in general manner：
Step 10, prepares one block of glassy metal of tabular；
Step 20, in micro- hole that the upper and lower surface etched array of glassy metal is arranged, each micro- hole is perpendicular to glassy metal table
Face.
In herein below, micro- hole that described micro- hole refers both in glassy metal upper and lower surface, wherein upper surface and
The Wei Keng positions of lower surface, shape are all consistent, therefore are not illustrating.
In the present embodiment, micro- hole 2 is set by the upper and lower surface of glassy metal 1, using the stress concentration energy in micro- hole 2
Amount excites plastic flow, while suppressing glassy metal 1 using the gradient stress concentration zones in micro- hole 2 produces shearing in Tensile
Band, so that the plastic deformation of glassy metal 1 turns into uniform flow and becomes plasticity, is realizing that glassy metal 1 stretches uniform rheology plasticity
While, the dependence to shear band is reduced, improve yield rate.
Micro- hole 2 in the present embodiment processes to be formed using laser equipment using pulse.Spoke can be produced using Laser Processing
Heat energy is penetrated, 2 surroundings of micro- hole is produced thermograde, different degrees of annealing is produced equivalent to the material around processing stand, made
One microcosmic gradient-structure of formation, this can suppress the generation and extension of shear band, at the same avoid machining easily generation
The problem of shear band.Specific laser equipment can be according to the size selection of glassy metal 1 to be processed.Can be according to glassy metal
Thickness lower surface sets micro- hole, the position of micro- hole 2 correspondence of upper and lower surface, as shown in figure 4, the depth in micro- hole 2 thereon respectively
How much relevant thickness with its effective stress area 21 covering glassy metal is, two micro- holes 2 of upper and lower surface, its effective stress area 21
It is in vertical direction standard to contact with each other, it is ensured that its maximal cover rate is without overlapping.
In one embodiment of the invention, micro- hole 2 and micro- hole the distance between 2, with two effective stresses in micro- hole 2
The scope in area 21 contacts with each other as standard determines.The effective stress area 21 in i.e. adjacent micro- hole 2 is standard to contact with each other, specifically
The effective stress area 21 in each micro- hole 2 is relevant with its surface diameter of a circle, and the effective stress area 21 in a general micro- hole 2 is a diameter of
The twice of the Wei Keng surfaces circular diameter, the effective stress area 21 in adjacent micro- hole 2 can not overlap and can not have spacing, each micro- hole 2
The space that effective stress area 21 just covers between adjacent cells 2 is standard.
According to foregoing reason, micro- hole 2 adjacent in the vertical, the micro- hole 2 arranged in its latter transverse direction is located at previous respectively
Between the two neighboring micro- hole 2 arranged in transverse direction on the extended line of center line, the micro- hole 2 on whole glassy metal 1 is handed in the vertical
Mistake arrangement.
Micro- hole 2 after arrangement is located on an oblique line respectively obliquely, micro- hole 2 along tilted direction solid matter face angle of inclination
The angle of inclination in the tension failure face before not setting micro- hole 2 with glassy metal 1 is consistent.And the depth in micro- hole 2 is with relative micro- in both sides
It is standard that the effective stress scope in hole 2 is in contact.
As shown in figure 3, the opening of micro- hole 2 of the present embodiment is circle, by the opening in micro- hole 2 to bottom is cheated, its circumference side is
Diminishing oval parabola.The parabola is excessive arc in the junction at hole bottom, tip occurs to avoid hole bottom, and
Cause that stress concentration is excessive to be caused to ftracture in advance.
The parabolical computing formula is：
Wherein d is the diameter in micro- hole 2, and x spans are [- d/2, d/2].
Below with the set-up mode in micro- hole 2 on glassy metal 1 in a specific example explanation present invention.
Sample material is Zr (zirconium) base metal glass, and it is 0.9 × 2.7 × 22mm to take dimensions3, the surface circle in micro- hole 2 is directly
Footpath is 150um, and depth is 300um, is 150um away from border, and the center of circle in the micro- hole of adjacent rows is staggered and spacing 300um, Tong Hangxiang
The center of circle in adjacent micro- hole is at a distance of 600um.
Glassy metal 1 is horizontally placed on processing platform, laser parameter needed for setting, the spread parameter of micro- hole 2 uses laser arteries and veins
The upper and lower surface for being punched in glassy metal etches 2 arrays of micro- hole respectively.
In the present embodiment, the laser equipment for using is TruMicro5250 lasers, its wavelength 515nm, mean power
30W, maximum impulse energy 150uJ, maximum impulse period L T.LT.LT 0.01ns, beam quality M2 ＜ 1.3, minimal repetition rate 200KHz,
Maximum repetition rate 800KHz.
The glassy metal 1 that micro- hole 2 will be accomplished fluently is placed in uniaxial tensile test is carried out in Material Testing Machine, semi-static load until
Sample is pulled off, and the elongation strain of laser treated regions is measured with Video Extensometer, obtains engineering stress-strain curve；Utilize
Engineering stress-strain curve is converted into true stress and strain curve by following formula；Calculate plastic elongation.
Here σeIt is engineering stress, εeIt is engineering strain, σtIt is true stress, εtIt is logarithmic strain.
Specifically plastic elongation calculation is:Linear fit is carried out to true stress and strain curve linearity range, with gained
Slope makees straight line through whole figure, and the section that straight line is deviateed on true stress and strain curve is plastic deformation section, its corresponding strain
As plastic elongation.
Zigzag rheology is not observed on load-deformation curve, it was demonstrated that stretching plastic is acted on not against multiple shear bands
Realize.With the cross-section morphology of scanning electron microscope observation sample, it is seen that the pattern similar to " pointed cone " and do not find shear band, and
" pointed cone " size is much larger than shear band size, shows that material there occurs uniform plastic's rheology, and from confirmation, this processing and treating method is complete
The stretching plastic deformation of glassy metal 1 all can enough be realized.
So far, although those skilled in the art will appreciate that detailed herein have shown and described multiple of the invention and show
Example property embodiment, but, without departing from the spirit and scope of the present invention, still can be direct according to present disclosure
It is determined that or deriving many other variations or modifications for meeting the principle of the invention.Therefore, the scope of the present invention is understood that and recognizes
It is set to and covers all these other variations or modifications.
Claims (4)
1. a kind of processing and treating method for making glassy metal produce stretching plastic, comprises the following steps：
Step 10, prepares one block of glassy metal of tabular；
Step 20, in micro- hole that the upper and lower surface etched array of the glassy metal is arranged, micro- hole is perpendicular to the metal
Glass surface；Micro- hole processes to be formed in the upper and lower surface of the glassy metal respectively using laser equipment using pulse；
On same plane it is described micro- hole with it is described it is micro- hole the distance between, with two effective stress area phase mutual connections in micro- hole
It is standard to touch, the twice of the surface diameter of a circle in a diameter of described micro- hole in the effective stress area；
The described micro- hole arranged in described micro- its latter transverse direction of hole adjacent in the vertical on same plane is located at previous horizontal stroke respectively
Upwards between two neighboring described micro- hole of arrangement on the extended line of center line；
Micro- hole is along the angle of inclination in tilted direction solid matter face and inclining for the tension failure face of the glassy metal on same plane
Rake angle is consistent；
The depth in micro- hole is with the effective stress area phase mutual connection in two relative micro- holes of the glassy metal upper and lower surface
It is standard to touch；
The opening in micro- hole is circle, and to bottom is cheated, its circumference side is diminishing oval throwing for the opening in micro- hole
Thing line.
2. processing and treating method according to claim 1, wherein,
The parabola is that arc is excessive in the junction at hole bottom.
3. processing and treating method according to claim 1, wherein,
The parabolical computing formula is：
Wherein d is the surface diameter of a circle in micro- hole, and the span of x is [- d/2, d/2].
4. processing and treating method according to claim 1, wherein,
The laser parameter of the laser equipment is：Wavelength 515nm, mean power 30W, maximum impulse energy 150uJ, maximum impulse
Period L T.LT.LT 0.01ns, beam quality M2 ＜ 1.3, minimal repetition rate 200KHz, maximum repetition rate 800KHz.
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| CN201510781725.3A CN105290617B (en) | 2015-11-13 | 2015-11-13 | A kind of processing and treating method for making glassy metal produce stretching plastic |
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| CN105290617B true CN105290617B (en) | 2017-05-31 |
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| CN110860766A (en) * | 2019-10-22 | 2020-03-06 | 广东开放大学（广东理工职业学院） | Modulated pulse current welding method and system for aluminum alloy sheet and storage medium |
| CN111304557B (en) * | 2020-03-20 | 2021-01-19 | 西安交通大学 | Metal glass metamaterial with fold structure |
Citations (5)
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|---|---|---|---|---|
| US6410884B1 (en) * | 1999-07-19 | 2002-06-25 | The Regents Of The University Of California | Contour forming of metals by laser peening |
| CN1958206A (en) * | 2006-10-10 | 2007-05-09 | 南京航空航天大学 | Electrochemical machining method in cellular dimple structure |
| CN101475135A (en) * | 2009-01-16 | 2009-07-08 | 华中科技大学 | Method for preparing high depth-to-width ratio carbon micro electro-mechanical device |
| CN101653802A (en) * | 2009-09-21 | 2010-02-24 | 上海交通大学 | Micro-pit array-processing method based on laser impact effect |
| CN103659001A (en) * | 2013-11-26 | 2014-03-26 | 苏州光韵达光电科技有限公司 | Laser drilling method of FPC |
-
2015
- 2015-11-13 CN CN201510781725.3A patent/CN105290617B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6410884B1 (en) * | 1999-07-19 | 2002-06-25 | The Regents Of The University Of California | Contour forming of metals by laser peening |
| CN1958206A (en) * | 2006-10-10 | 2007-05-09 | 南京航空航天大学 | Electrochemical machining method in cellular dimple structure |
| CN101475135A (en) * | 2009-01-16 | 2009-07-08 | 华中科技大学 | Method for preparing high depth-to-width ratio carbon micro electro-mechanical device |
| CN101653802A (en) * | 2009-09-21 | 2010-02-24 | 上海交通大学 | Micro-pit array-processing method based on laser impact effect |
| CN103659001A (en) * | 2013-11-26 | 2014-03-26 | 苏州光韵达光电科技有限公司 | Laser drilling method of FPC |
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Effective date of registration: 20220919 Address after: 511458 Room 501, building 1, 1119 Haibin Road, Nansha District, Guangzhou City, Guangdong Province Patentee after: Guangdong Aerospace Science and Technology Research Institute Address before: 100190, No. 15 West Fourth Ring Road, Beijing, Haidian District Patentee before: INSTITUTE OF MECHANICS, CHINESE ACADEMY OF SCIENCES |
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