CN1293224C - Method for raising the strength and toughness of nickel-aluminium alloys by strong magnetic field - Google Patents
Method for raising the strength and toughness of nickel-aluminium alloys by strong magnetic field Download PDFInfo
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- CN1293224C CN1293224C CNB2003101050175A CN200310105017A CN1293224C CN 1293224 C CN1293224 C CN 1293224C CN B2003101050175 A CNB2003101050175 A CN B2003101050175A CN 200310105017 A CN200310105017 A CN 200310105017A CN 1293224 C CN1293224 C CN 1293224C
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- 238000000034 method Methods 0.000 title claims abstract description 14
- 229910000545 Nickel–aluminium alloy Inorganic materials 0.000 title 1
- 239000000956 alloy Substances 0.000 claims abstract description 35
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 33
- NPXOKRUENSOPAO-UHFFFAOYSA-N Raney nickel Chemical class [Al].[Ni] NPXOKRUENSOPAO-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000000463 material Substances 0.000 claims abstract description 9
- 238000012360 testing method Methods 0.000 claims description 13
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 12
- 239000011651 chromium Substances 0.000 claims description 9
- 229910052782 aluminium Inorganic materials 0.000 claims description 8
- 229910052804 chromium Inorganic materials 0.000 claims description 8
- 229910052735 hafnium Inorganic materials 0.000 claims description 8
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 8
- 229910052759 nickel Inorganic materials 0.000 claims description 8
- 229910052750 molybdenum Inorganic materials 0.000 claims description 7
- 239000010936 titanium Substances 0.000 claims description 6
- 229910052719 titanium Inorganic materials 0.000 claims description 6
- 229910052742 iron Inorganic materials 0.000 claims description 5
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 4
- 239000004411 aluminium Substances 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 230000006698 induction Effects 0.000 claims description 4
- 238000002844 melting Methods 0.000 claims description 4
- 230000008018 melting Effects 0.000 claims description 4
- 239000002994 raw material Substances 0.000 claims description 4
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 3
- VBJZVLUMGGDVMO-UHFFFAOYSA-N hafnium atom Chemical compound [Hf] VBJZVLUMGGDVMO-UHFFFAOYSA-N 0.000 claims description 3
- 239000011733 molybdenum Substances 0.000 claims description 3
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 2
- 230000001681 protective effect Effects 0.000 claims description 2
- 230000002708 enhancing effect Effects 0.000 claims 3
- 230000006835 compression Effects 0.000 abstract description 13
- 238000007906 compression Methods 0.000 abstract description 13
- 238000005516 engineering process Methods 0.000 abstract description 2
- YYCNOHYMCOXPPJ-UHFFFAOYSA-N alumane;nickel Chemical class [AlH3].[Ni] YYCNOHYMCOXPPJ-UHFFFAOYSA-N 0.000 abstract 1
- 238000005728 strengthening Methods 0.000 abstract 1
- 229910000943 NiAl Inorganic materials 0.000 description 7
- 238000005452 bending Methods 0.000 description 6
- 238000003776 cleavage reaction Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000013001 point bending Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000007017 scission Effects 0.000 description 2
- 206010011376 Crepitations Diseases 0.000 description 1
- 229910001029 Hf alloy Inorganic materials 0.000 description 1
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 230000003078 antioxidant effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000001513 hot isostatic pressing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001902 propagating effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000004154 testing of material Methods 0.000 description 1
- 238000007669 thermal treatment Methods 0.000 description 1
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Abstract
A method for strengthening the strength and the toughness of nickel-aluminium series alloy by a strong magnetic field belongs to the technical field of modifying materials by a strong magnetic field. Both the strength and the toughness of NiAl series alloy at root temperature are low, which is an important problem and is not solved for a long time for the material circle in the world, so the application of alloy is seriously infected. The present invention utilizes a strong magnetic field to strengthen the strength and the toughness of NiAl series alloy under some condition. For example, the strength at room temperature is enhanced to 100% after the NiAlCr (Mo) Hf is treated by a strong magnetic field, and the plastic elongation rate of compression at room temperature reaches over 20%; therefore, an alloy modifying method with low cost and simple technology is found out. After the NiAl series alloy is modified by the technique, alloy materials can be used in various fields, such as military, domestic use, high-temperature engines for astronavigation and aviation, etc.
Description
Technical field
The invention belongs to the technical field of carrying out material modification with high-intensity magnetic field.
Background technology
NiAl is to be one of popular alloy materials of research both at home and abroad the nearest more than ten years of alloy.It has characteristics such as hot strength height, antioxidant property are good, is expected to become the new type high temperature structured material, obtains to use at aerospace industry.It is relatively poor that but most NiAl are toughness, and particularly at room temperature, intensity and toughness are all lower.Thereby Materials science worker has adopted multiple means to solve this problem, improve the intensity and the toughness of alloy as alloying, hot isostatic pressing, directional freeze or the like, yet present improving one's methods all is limited, and alloy does not also reach service requirements.
Summary of the invention
Purpose of the present invention just provide a kind of with high-intensity magnetic field improve intensity that NiAl is an alloy and toughness, method is simple, with low cost.
Technical conceive of the present invention is under vacuum, protective gas or atmospheric environment, is that alloy is placed in the high-intensity magnetic field with NiAl, magnetic field be constant, alternation or pulse.In certain temperature and magneticstrength condition, handle the regular hour, this processing can repeatedly be carried out repeatedly, and finally making NiAl is the intensity and the obviously improvement of toughness acquisition of alloy.
Technical solution of the present invention is, a kind ofly improve intensity and the flexible method that NiAl is an alloy with high-intensity magnetic field, with the principal element in the alloy is Ni, Al, Cr, Mo, Ti, Hf, and Fe, press atomic percent, main component is: 20-80%Ni, 20-80%Al, 0-35%Cr, 0-15%Mo, 0-3%Ti, 0-1%Hf, the alloy of 0-35%Fe, melting in vacuum induction furnace is heated material to 700 ℃-900 ℃ again, handle certain hour (〉=1 minute) with the 1-100T high-intensity magnetic field along the test specimen different directions, remove magnetic field, demagnetizing field naturally cools to room temperature.
As the electrolytic nickel purity of raw material be 〉=99.9%, metallic aluminium purity for 〉=99.9%, chromium purity for 〉=99.5%, molybdenum purity for 〉=99.99%, hafnium purity for 〉=73.5%, purity 〉=99% of iron purity 〉=98%, titanium.
The beneficial effect that the present invention reaches is: the test specimen after magnetic field treatment, carry out three-point bending strength test and compression testing on the MTS material-testing machine.
1. anti-bending strength:
Little, the good stability of three point bending test method experimental error.Test specimen obviously improves through the sample intensity after the magnetic field treatment.NiAl is that alloy at room temperature fragility is very big, and after handling through high-intensity magnetic field, though obvious yield phenomenon do not occur, intensity improves a lot, and port is observed discovery ductile rupture feature.The force-displacement curve of proof bend test obviously shows the Young's modulus of high-intensity magnetic field processing change material.Magnetic field treatment makes material after bigger recoverable deformation takes place, and produces fracture.
2. room temperature compression performance
When sample does not pass through magnetic field treatment, present the obvious feature of brittle feature; Improve about 60-70% through the vertical compressive strength after the magnetic field treatment, and presented certain plasticity compressive features; Horizontal compression intensity has improved about more than 100%, and plastic behavior is obvious, and unit elongation has reached more than 20%.
Description of drawings
The present invention is further illustrated below in conjunction with drawings and Examples.
The comparison diagram of Fig. 1 sample bending strength.
The no magnetic field treatment of macro morphology (a) of Fig. 2 test specimen fracture fracture; (b) after the magnetic field treatment.
Fig. 3 SEM observes bend fracture fracture apperance (a), (c) magnetic field treatment of test specimen; (b), (d) do not have magnetic field treatment.
Compression mechanics performance chart when Fig. 4 alloy is untreated.
Vertical compression mechanics performance chart after Fig. 5 alloy is handled through high-intensity magnetic field.
Horizontal compression mechanical characteristic figure after Fig. 6 alloy is handled through high-intensity magnetic field.
Fig. 7 SEM observes the tiny crack without the bend fracture fracture of magnetic field treatment.
Compression mechanics performance chart when Fig. 8 alloy is untreated.
Vertical compression mechanics performance chart after Fig. 9 alloy is handled through high-intensity magnetic field.
Horizontal compression mechanical characteristic figure after Figure 10 alloy is handled through high-intensity magnetic field.
Horizontal compression mechanical characteristic figure after Figure 11 alloy is handled through high-intensity magnetic field.
Embodiment
Embodiment 1
The nominal composition of alloy is (atomic percent): Ni-33%Al-28%Cr-5.8%Mo-0.2%Hf, and raw material adopts electrolytic nickel (99.9%), metallic aluminium (99.9%), chromium (99.5%), molybdenum (99.99%) and hafnium (73.5%); Melting in vacuum induction furnace; Through thermal treatment process be: 1050 ℃ are incubated 1 hour, furnace cooling.
Be cut into the sample of various size with line.Sample is heated to 900 ℃, handles 45 minutes with the 10T high-intensity magnetic field, removes magnetic field, naturally cools to room temperature.
The bending strength of sample as shown in Figure 1, the sample mean bending strength that does not have magnetic field treatment is 245MPa, and is 430MPa through the sample mean bending strength of magnetic field treatment, has improved 75%.
High-intensity magnetic field is handled the fracture fracture apperance generation considerable change of back anti-reflecting bending strength test sample.Test specimen fracture cross section without magnetic field treatment is always vertical with length direction (L direction), shows as the brittle rupture feature.And the test specimen fracture after the process magnetic field treatment is oblique section (being about 45-55 ° with test specimen length L direction), has the characteristics of ductile rupture, as shown in Figure 2.This oblique section fracture feature shows NiAl-Cr (Mo)-Hf alloy after high-intensity magnetic field is handled, and obviously strengthens in length direction (field direction) intensity of sample, presents the anisotropy of mechanical property.
Have the feature of many ductile ruptures through the fracture surface of sample after the magnetic field treatment, the pattern of fracture shows as micro-tearing in large quantities, and does not find micro-crack, partial cleavage fracture step seldom, referring to Fig. 3.And can not see a large amount of cleavage surfaces through the fracture surface of sample of magnetic field treatment, and present the obvious feature of brittle feature, and have tangible fracture crack to propagate texture, find some micro-flaws in the part, and these crackles are mostly along the direction of propagating texture.High-intensity magnetic field is handled the alloy at room temperature fracture mode is changed.
Compression mechanical characteristic when sample does not pass through magnetic field treatment compresses mechanical characteristic shown in Fig. 5,6 through the vertical and horizontal after the magnetic field treatment as shown in Figure 4.Sample presents the obvious feature of brittle feature during not through magnetic field treatment; Improved approximately 70% through the vertical compressive strength after the magnetic field treatment, and presented certain plasticity compressive features; It is about 100% that horizontal compression intensity has improved, and plastic behavior is obvious, and unit elongation has reached 20%.
The nominal composition of alloy is: Ni20Al30Fe, and raw material adopts electrolytic nickel (99.9%), metallic aluminium (99.9%), chromium (99.5%); Melting in vacuum induction furnace; Be cut into the sample of various size with line.Sample is heated to 700 ℃, handles 35 minutes with the 10T high-intensity magnetic field, removes magnetic field, naturally cools to room temperature.Tensile yield strength is brought up to 720MPa by about 600MPa under the room temperature, and tensile break strength is brought up to 900MPa by about 800MPa, and tension set brings up to 15% by 9%.
Claims (5)
1. an intensity and flexible method that strengthens the nickel aluminium series alloy with high-intensity magnetic field; it is characterized in that; principal element in the alloy is Ni, Al, Cr, Mo, Ti, Hf; and Fe; press atomic percent, main component is: 20-80%Ni, 20-80%Al; 0-35%Cr; 0-15%Mo, 0-3%Ti, 0-1%Hf; 0-35%Fe; melting in vacuum induction furnace is heated material to 700-900 ℃ again, handles 35-45 minute along the test specimen different directions with the 1-100T high-intensity magnetic field under vacuum, protective gas or atmospheric environment; remove magnetic field, in stove, naturally cool to room temperature.
2. a kind of intensity and flexible method that strengthens the nickel aluminium series alloy with high-intensity magnetic field according to claim 1, it is characterized in that, as the electrolytic nickel purity of raw material be 〉=99.9%, metallic aluminium purity for 〉=99.9%, chromium purity for 〉=99.5%, molybdenum purity for 〉=99.99%, hafnium purity for 〉=73.5%, purity 〉=99% of iron purity 〉=98%, titanium.
3. a kind of intensity and flexible method with high-intensity magnetic field enhancing nickel aluminium series alloy according to claim 1 is characterized in that magnetic field is constant.
4. a kind of intensity and flexible method with high-intensity magnetic field enhancing nickel aluminium series alloy according to claim 1 is characterized in that magnetic field is alternating magnetic field.
5. a kind of intensity and flexible method with high-intensity magnetic field enhancing nickel aluminium series alloy according to claim 1 is characterized in that magnetic field is pulsed magnetic field.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101050175A CN1293224C (en) | 2003-11-04 | 2003-11-04 | Method for raising the strength and toughness of nickel-aluminium alloys by strong magnetic field |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101050175A CN1293224C (en) | 2003-11-04 | 2003-11-04 | Method for raising the strength and toughness of nickel-aluminium alloys by strong magnetic field |
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| CN1542157A CN1542157A (en) | 2004-11-03 |
| CN1293224C true CN1293224C (en) | 2007-01-03 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1324159C (en) * | 2005-06-06 | 2007-07-04 | 辽宁工学院 | Method for preparing nanocystalline ingot casting by magnetic field and ultrasonic combined treatment of metal melt and dedicated apparatus therefor |
| CN103643191B (en) * | 2013-12-17 | 2016-01-13 | 江苏大学 | A kind of prestress Light deformation method improving aluminium unit elongation |
| CN103628010B (en) * | 2013-12-17 | 2016-03-02 | 江苏大学 | A kind of optomagnetic coupling process improving plastic deformation capacity of aluminum matrix composite |
| CN105132843B (en) * | 2015-08-21 | 2018-04-24 | 江苏大学 | A kind of method of magnetically processing for improving metal material elastic deformability |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1453388A (en) * | 2002-04-27 | 2003-11-05 | 艾默生电气（中国）投资有限公司 | Magnetic and heating treatment method to improve magnetically driven reversible strain property of polycrystalline Ni2 MnGa |
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| CN1453388A (en) * | 2002-04-27 | 2003-11-05 | 艾默生电气（中国）投资有限公司 | Magnetic and heating treatment method to improve magnetically driven reversible strain property of polycrystalline Ni2 MnGa |
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