CN105466793A - Device for testing plastic deformation capacity of metal glass material - Google Patents
Device for testing plastic deformation capacity of metal glass material Download PDFInfo
- Publication number
- CN105466793A CN105466793A CN201610002106.4A CN201610002106A CN105466793A CN 105466793 A CN105466793 A CN 105466793A CN 201610002106 A CN201610002106 A CN 201610002106A CN 105466793 A CN105466793 A CN 105466793A
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- metal glass
- plastic deformation
- counterdie
- patrix
- glass material
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/28—Investigating ductility, e.g. suitability of sheet metal for deep-drawing or spinning
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
A device for testing the plastic deformation capacity of a metal glass material comprises a lower mold. An upper mold is arranged in the lower mold. The upper mold and the lower mold are connected in a threaded mode. The upper mold and the lower mold are each provided with a central hole. A metal glass wafer sample is arranged between the central holes of the upper mold and the lower mold. A hard alloy ball is arranged on the metal glass wafer sample. A pressing rod is arranged on the upper face of the hard alloy ball. Pressure is exerted by the pressing rod on the hard alloy ball. The hard alloy ball exerts pressure on the metal glass wafer sample so that deformation and breakage appearance can be produced, and then the ductile-brittle performance of the metal glass wafer sample is achieved. The device has the advantages that the metal glass wafer sample required by the testing device is small in size and only has a diameter of 3*0.2 mm, and the requirement for testing the plastic deformation cavity of an ordinary metal glass material can be met; by means of the testing device, remarkable plastic deformation can be produced on tough metal glass, the ductile-brittle performance of different metal glass materials can be conveniently and rapidly distinguished, and the plastic deformation capacity and the ductile-brittle performance of metal glass can be judged only according to the stroke of the pressing rod.
Description
Technical field
The invention belongs to metal glass material field, particularly a kind of proving installation of metal glass material plastic deformation ability.
Background technology
Since metal glass material is born, the method majority studying its plastic deformation ability adopts Uniaxial Compression or unilateral stretching.These two kinds of methods can only make metallic glass produce very limited shear zone, and thus its plastic yield is also very limited.As under unilateral stretching load, metallic glass, generally along main shear zone generation catastrophic failure, cannot obtain the shear zone of stable expansion.And under uniaxial compression load the plastic yield stability of metallic glass higher than unilateral stretching load, the shear zone of some can be obtained, but it requires comparatively strict to sample, need to ensure the absolute parallel of upper and lower end face, and need there is good lubrication with the loading pressure head of testing machine, otherwise experimental data is comparatively discrete, repeatability is very poor, and confidence level is extremely low.And the glass forming ability of metal glass material is all more weak, be generally difficult to meet unilateral stretching or the test size required for compression.Therefore, develop a kind of not only simple and convenient, but also the proving installation of the metal glass material plastic deformation ability saving test material just seem particularly important and urgent.
Under unilateral stretching load, the process that metallic glass produces shear zone can think a kind of centrality constriction or unstability, and its instability condition is that maximum tension extension strain equals its strain hardening exponent.And the instability condition of biaxial tensile loading is the strain hardening exponent that maximum tension extension strain equals twice.Therefore, adopt the method for two-way stretch, effectively can improve the plastic yield stability of metal glass material.
Summary of the invention
The technical problem to be solved in the present invention is, overcomes the deficiency that prior art exists, and produces the principle of approximate two-way stretch, provide a kind of proving installation of metal glass material plastic deformation ability when utilizing metal material punching press at punching press immediate vicinity.
The present invention has a counterdie, a patrix is had in counterdie, be threaded between patrix with counterdie, upper die and lower die all have a center pit, metallic glass circular disc test specimen is installed between patrix and the center pit of counterdie, a sintered carbide ball is had on metallic glass circular disc test specimen, a depression bar is had on sintered carbide ball, depression bar is utilized to apply pressure to sintered carbide ball, sintered carbide ball is exerted pressure metallic glass circular disc test specimen, make it produce Deformation and Crack pattern, thus obtain the tough fragility of metallic glass circular disc test specimen.
The center-hole diameter of counterdie is greater than the center-hole diameter of patrix, and the center-hole diameter of counterdie is 1.5-1.8 times of the center-hole diameter of patrix.
The invention has the advantages that:
1, the metallic glass circular disc test specimen size needed for this proving installation is less, is only Ф 3 × 0.2mm, can meets the test of common metal glass material plastic deformation ability.
2, this proving installation can produce significant plastic yield on ductile metal glass, forms the multiple shear bands of stable expansion, and controls the expansion process of shear zone.
3, this proving installation can distinguish the tough fragility of different metal glass material quickly and easily: can produce significant plastic yield on ductile metal glass, forms the multiple shear bands of stable expansion and circumferential shear fissure; Low ductile metal glass can be formed multiple shear bands and the radial shear crackle of stable expansion; Brittle metal glass only produces positive failure crack, and does not produce shear zone and shear fissure, and, only need the size according to depression bar stroke, the power of metallic glass plastic deformation ability and tough fragility thereof can be differentiated.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the shear zone and shear fissure schematic diagram that utilize proving installation of the present invention to obtain on ductile metal glass material;
Fig. 3 is the shear zone and shear fissure schematic diagram that utilize proving installation of the present invention to obtain on low ductile metal glass material;
Fig. 4 is the positive failure crack schematic diagram utilizing proving installation of the present invention to obtain on brittle metal glass material.
Embodiment
As shown in Figure 1, the present invention has a counterdie 1, has a patrix 2 in counterdie 1, and patrix 2 and counterdie 1 all adopt No. 45 steels to do, and are threaded between patrix 2 with counterdie 1, is convenient to install and take out sample; Patrix 2 and counterdie 1 all have a center pit, and the center-hole diameter of counterdie 1 is greater than the center-hole diameter of patrix 2, the center-hole diameter of counterdie 1 is 1.5-1.8 times of the center-hole diameter of patrix 2; Between patrix 2 and the center pit of counterdie 1, be provided with metallic glass circular disc test specimen 3, the diameter of metallic glass circular disc test specimen 3 and thickness can be respectively Ф 3mm and 0.2mm; On metallic glass circular disc test specimen 3, have a sintered carbide ball 5, sintered carbide ball 5 is YG6 wimet; A depression bar 4 is had on sintered carbide ball 5, depression bar 4 is T10 tool steel, the diameter of sintered carbide ball 5 and depression bar 4 is slightly less than the center-hole diameter of patrix 2, so that move wherein, depression bar 4 is utilized to apply pressure to sintered carbide ball 5, sintered carbide ball 5 is exerted pressure metallic glass circular disc test specimen 3, makes metallic glass circular disc test specimen 3 produce Deformation and Crack pattern, thus obtains the tough fragility of metallic glass circular disc test specimen 3.
Concrete operation step:
1, counterdie 1 is mounted and fixed on the lower chuck of omnipotent mechanics machine, the center pit bottom counterdie 1 is placed the metallic glass circular disc test specimen 3 being of a size of Ф 3 × 0.2mm;
2, patrix 2 is screwed on counterdie 1, metallic glass circular disc test specimen 3 is compressed;
3, the sintered carbide ball 5 being 1mm diameter puts into the center pit of patrix 2, contacts with metallic glass circular disc test specimen 3;
4, depression bar 4 is put into the center pit of patrix 2, and guarantee that its lower surface contacts with sintered carbide ball 5;
5, regulate omnipotent mechanics machine, the lower surface of omnipotent mechanics machine crossbeam seaming chuck is contacted with the upper surface of depression bar 4;
6, setting omnipotent mechanics machine crosshead displacement speed is 0.1mm/min, starts the plastic deformation ability testing metallic glass, and records depression bar 4 stroke, can obtain the tough fragility of this metallic glass circular disc test specimen 3.
For metal glass material, when depression bar 4 stroke is less than 0.03mm, only there is elastic deformation; When depression bar 4 stroke is greater than 0.03mm, plastic yield will occur, and stroke is larger, plastic yield is larger; If depression bar 4 stroke is less than 0.03mm metallic glass circular disc test specimen 3 and namely there occurs and just rupture, only there is radial positive failure crack 9 in surface, as shown in Figure 4, then this material is brittle metal glass; If depression bar 4 stroke is greater than 0.03mm and is less than 0.25mm and there occurs shear fracture, there is radial and circumferential shear zone 6 in surface, and occurs radial shear fissure 8, and as shown in Figure 3, then this material is low ductile metal glass; When depression bar 4 stroke is greater than 0.25mm, circumferential shear fracture occurs, there is radial and circumferential shear zone 6 in surface, and occurs circumferential shear fissure 7, and as shown in Figure 2, then this material is high-toughness metal glass.
Claims (2)
1. the proving installation of a metal glass material plastic deformation ability, it is characterized in that, it has a counterdie, a patrix is had in counterdie, be threaded between patrix with counterdie, upper die and lower die all have a center pit, metallic glass circular disc test specimen is installed between patrix and the center pit of counterdie, on metallic glass circular disc test specimen, there is a sintered carbide ball, on sintered carbide ball, have a depression bar.
2. the proving installation of metal glass material plastic deformation ability according to claim 1, is characterized in that, the center-hole diameter of counterdie is greater than the center-hole diameter of patrix, and the center-hole diameter of counterdie is 1.5-1.8 times of the center-hole diameter of patrix.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610002106.4A CN105466793A (en) | 2016-01-06 | 2016-01-06 | Device for testing plastic deformation capacity of metal glass material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610002106.4A CN105466793A (en) | 2016-01-06 | 2016-01-06 | Device for testing plastic deformation capacity of metal glass material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105466793A true CN105466793A (en) | 2016-04-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610002106.4A Pending CN105466793A (en) | 2016-01-06 | 2016-01-06 | Device for testing plastic deformation capacity of metal glass material |
Country Status (1)
| Country | Link |
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| CN (1) | CN105466793A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108645697A (en) * | 2018-05-14 | 2018-10-12 | 西南科技大学 | A kind of small sample mechanical property testing system for nuclear structural materials |
| CN109142631A (en) * | 2018-08-17 | 2019-01-04 | 武汉国量仪器有限公司 | A kind of water plant toughness measuring instrument |
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| CN2731438Y (en) * | 2004-10-12 | 2005-10-05 | 南京工业大学 | High temp creep performance testing appts .for microsample |
| CN1837797A (en) * | 2006-04-14 | 2006-09-27 | 南京工业大学 | Small punch creep test system |
| CN101187612A (en) * | 2007-11-23 | 2008-05-28 | 华东理工大学 | Small drill drift creepage test device |
| CN101639426A (en) * | 2009-08-07 | 2010-02-03 | 华东理工大学 | Mounting and clamping system of small punch test machine |
| CN202041414U (en) * | 2011-03-23 | 2011-11-16 | 中国特种设备检测研究院 | Sample loading and clamping device |
| CN102692373A (en) * | 2012-06-14 | 2012-09-26 | 华东理工大学 | Stress corrosion sensitivity evaluation device based on small punch rod test technology |
| CN102759485A (en) * | 2012-07-06 | 2012-10-31 | 西安交通大学 | Micro pressure shear experimental device and testing method of mechanical property of fusion welding microcell |
-
2016
- 2016-01-06 CN CN201610002106.4A patent/CN105466793A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2731438Y (en) * | 2004-10-12 | 2005-10-05 | 南京工业大学 | High temp creep performance testing appts .for microsample |
| CN1837797A (en) * | 2006-04-14 | 2006-09-27 | 南京工业大学 | Small punch creep test system |
| CN101187612A (en) * | 2007-11-23 | 2008-05-28 | 华东理工大学 | Small drill drift creepage test device |
| CN101639426A (en) * | 2009-08-07 | 2010-02-03 | 华东理工大学 | Mounting and clamping system of small punch test machine |
| CN202041414U (en) * | 2011-03-23 | 2011-11-16 | 中国特种设备检测研究院 | Sample loading and clamping device |
| CN102692373A (en) * | 2012-06-14 | 2012-09-26 | 华东理工大学 | Stress corrosion sensitivity evaluation device based on small punch rod test technology |
| CN102759485A (en) * | 2012-07-06 | 2012-10-31 | 西安交通大学 | Micro pressure shear experimental device and testing method of mechanical property of fusion welding microcell |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108645697A (en) * | 2018-05-14 | 2018-10-12 | 西南科技大学 | A kind of small sample mechanical property testing system for nuclear structural materials |
| CN109142631A (en) * | 2018-08-17 | 2019-01-04 | 武汉国量仪器有限公司 | A kind of water plant toughness measuring instrument |
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Application publication date: 20160406 |
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| RJ01 | Rejection of invention patent application after publication |