CN102967507A - Method for testing mechanical property of material subjected to ion irradiation - Google Patents
Method for testing mechanical property of material subjected to ion irradiation Download PDFInfo
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- CN102967507A CN102967507A CN2012104453035A CN201210445303A CN102967507A CN 102967507 A CN102967507 A CN 102967507A CN 2012104453035 A CN2012104453035 A CN 2012104453035A CN 201210445303 A CN201210445303 A CN 201210445303A CN 102967507 A CN102967507 A CN 102967507A
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Abstract
The invention provides a method for evaluating mechanical property of a material subjected to ion irradiation. The method comprises the following steps of: machining a specified irradiation sample, and measuring an actual thickness D1 from the bottom of a U-shaped notch to the lower surface of the irradiation sample and a width D2 of the sample; performing double-sided irradiation on the sample which is put into an ion implanter, performing a tensile test and an impact test on the irradiated sample, thus acquiring experimental data; and finally, evaluating the mechanical property of the material according to the acquired data, wherein the toughness of the material is evaluated by impact work acquired by the impact test, and the strength of the material is obtained by the formula that Rm=F/(D1*D2), wherein Rm is the tensile strength of the material, and F is maximum force determined from a tensile curve in the experimental process. The method solve the problem that the mechanical property of the material subjected to ion irradiation is difficult to evaluate, and has an important scientific research value.
Description
Technical field
The invention belongs to the Material mechanics test technology, be specifically related to a kind of material ion irradiation mechanic property test method, be particularly useful for the irradiation Mechanics Performance Testing of fusion reactor structured material.
Background technology
Fusion reactor structured material such as covering or the first wall construction material will bear high energy (14MeV), the high dose (10 that fusion reaction is emitted under arms the time
23Ncm
-2) irradiation of neutron, this can cause the tissue deterioration of material, such as: component segregation, irradiation phase transformation, void swelling, radiation-induced dislocation ring are separated out etc., the variation of these tissues finally can cause the reduction of material mechanical performance such as intensity, ductility, toughness and the shortening in serviceable life, seriously injure fusion reactor Operation safety energy, therefore, before fusion reactor was finally gone on commercial the application, it is especially important that the material irradiation Study on Structure Property just seems.At present, both at home and abroad neutron source is very limited, and the energy of neutron and dosage do not reach the requirement of fusion reactor yet, and the characteristics such as the long property consuming time of neutron irradiation have seriously limited, and existing neutron source is used for the tissue of material and the research of performance is used.Ion irradiation is then similar with neutron irradiation, the initial knock-on atom that produces by collision is the atomic nucleus of material itself, the effect that can be used for the simulation neutron irradiation, therefore, in order to overcome the above-mentioned shortcoming of neutron irradiation, a large amount of scientific research personnel takes tissue and performance variation law and the mechanism of ion irradiation simulation neutron irradiation research material both at home and abroad.
Compare with neutron irradiation, ion irradiation exists a significant shortcoming to be exactly: the ion penetration ability is very limited, usually in material, can only penetrate hundreds of nanometers, therefore, (for example be of a size of: (for example be of a size of: 10mm * 10mm * 50mm) is very approaching through the Mechanical Data that the data of carrying out Mechanics Performance Testing behind the ion irradiation and obtaining and the identical sample testing of irradiation not obtain for Φ 5mm * 25mm) or V-type or U-shaped impact specimen for the standard tensile sample of processing, that is to say, because standard tensile or impact specimen are very thick, irradiation is difficult to reflect on the impact of mechanical property.In a word, conventional material mechanical performance evaluation method is not applicable to the evaluation of material ion irradiation mechanical property.
Summary of the invention
The object of the present invention is to provide a kind of material ion irradiation mechanic property test method, the mechanical performance data that obtains by the method can reflect that ion irradiation is on the impact of material mechanical performance, the method can solve the difficult difficult problem of estimating of material ion irradiation mechanical property, and the mechanical performance data of the material ion irradiation that obtains by this method can provide directive function for optimizing components design and preparation technology's adjustment of advanced fusion reactor structured material.
A kind of material ion irradiation mechanic property test method provided by the invention, its step comprises:
The 1st step is at U-shaped breach of upper processing of sample to be tested;
The upper surface width of sample to be tested is D2, and U-shaped breach bottom is D1 to the distance of lower surface A face, and the width of U-shaped breach is L1; D2=10mm ± 5mm, D1＜0.06mm, L1=0.2mm ± 0.05mm;
The U-shaped breach bottom of the 2nd pacing amount sample to be tested is to actual range d1 and the upper surface developed width d2 of lower surface;
The 4th step was carried out two-sided ion irradiation with sample to be tested again;
The 5th step was carried out Mechanics Performance Testing with the sample to be tested behind the irradiation, obtained test data, the tensile strength R of material after the radiation
m=F/ (d1 * d2), wherein R
mBe the tensile strength of material, F is the maximum, force that reaches in definite experimentation on the stress strain curve figure.
As improvement of the technical scheme, the length L 2 of sample to be tested is 80mm ± 20mm, and thickness D3 is 0.3mm ± 0.1mm.
Innovative point of the present invention is: by open a small gap on the irradiated sample surface, the thickness that can reduce on the one hand the material irradiation face is thin to D1, so that irradiation can not be ignored the impact of the mechanical property of material, on the other hand, this breach has susceptibility, can extend irradiation on the impact of material mechanical performance, that is to say, compare with irradiated sample not, the irradiated sample mechanical performance data can produce significant difference.By research material irradiation mechanical property Changing Pattern, can provide the science reference for advanced steel product optimizing components design and preparation process amelioration, therefore, method provided by the invention has important Practical significance.
Description of drawings
Fig. 1 is the irradiated sample synoptic diagram, wherein, (a) is front view, (b) is vertical view.
Embodiment
A kind of material ion irradiation mechanic property test method provided by the invention, measure first sample U-shaped breach to be irradiated bottom to the actual (real) thickness D1 of lower surface and the developed width D2 of sample, again this sample is put into ion implantation apparatus and carried out two-sided irradiation, then carry out Mechanics Performance Testing with universal tensile testing machine or impact testing machine, the ballistic work that impulse test obtains is directly in order to the toughness of evaluating material irradiation, and the intensity of material then needs to calculate.Its concrete steps comprise:
The 1st step, this U-shaped breach bottom was D1 to the distance of lower surface A at U-shaped breach of upper processing of sample to be tested, and the width of U-shaped breach is L1, and each actual dimensional tolerence is less than 5%, and lower surface smooth finish is not less than 3 grades, and its structure as shown in Figure 1.
The long L2 of this sample, wide D2, thick D3, the U-shaped shape is opened in the sample middle, the wide L1 of U-shaped breach, greasy dirt will clean up in the U-shaped breach distance from bottom sample lower surface D1 (seeing for details shown in Figure 1), specimen surface and breach, and the side will be polished bright.
Concrete size: L1=0.2mm ± 0.05mm, L2=80mm ± 20mm, D1:＜0.06mm, D2=10mm ± 5mm, D3=0.3mm ± 0.1mm
The sample to be tested side that processes should be polished bright, so that microscopically observes, and sample to be tested is cleaned up;
The 2nd step with U-shaped breach bottom to the distance B 1 of lower surface and 2 actual measurements of upper surface width D out, be designated as respectively d1, d2;
The 3rd step put into ion implantation apparatus with said sample and carries out two-sided ion irradiation.
The 4th step by carrying out Mechanics Performance Testing in universal tensile testing machine or the impact testing machine, was obtained test data, the tensile strength R of material after the radiation with irradiated sample
mNeed to calculate and toughness can be taked ballistic work evaluation, its calculation of Tensile Strength formula is: R
m=F/ (d1 * d2), wherein R
mBe the tensile strength of material, F determines the maximum, force that reaches in the experimentation on the stress strain curve figure, d1 be U-shaped breach bottom to the actual (real) thickness of lower surface, d2 is the sample actual measured width.
Below by by embodiment the present invention being described in further detail, but following examples only are illustrative, and protection scope of the present invention is not subjected to the restriction of these embodiment.
Example 1:
The SCRAM steel (0.1wt.%C-9.3%Cr-2.26%W-V-Ti-N) of Central China University of Science and Technology's independent development that quenching+tempering was processed is by the irradiated sample that is processed into shown in Figure 1, processing quantity is 3,3 sample lower surface smooth finish ranks are 3.1, side (face of D3 * L1) is bright through the fine sandpaper polishing, then sample is put in the ultrasonic cleaner and cleaned 0.5h with gasoline first, change afterwards acetone into and clean 1h, again the sample that cleans up is measured by microscope, the U-shaped breach of sample bottom to the distance B 1 of lower surface is respectively 0.046mm, 0.052mm, 0.065mm, and measure specimen width D2 by vernier caliper and be respectively 10.01mm, 10.02mm, carry out two-sided ferric ion irradiation 9.96mm then sample is put into ion implantation apparatus, irradiation temperature is decided to be 300 ℃, dosage is 5dpa, complete rear taking-up sample to be irradiated is by universal tensile testing machine (model: H3-C3-2.0t-3B-C) it is carried out stretching experiment and obtain stress strain curve figure, obtain from figure that maximum, force is respectively 358.5N the experimentation, 406.5N, 459.8N, at last by formula R
m=F/ (D1 * D2) calculate Rm to be respectively 778.6MPa, 780.17MPa, 710.2MPa.During the D1 of sample＜0.06mm, the result is more concentrated, has certain credibility.
Example 2:
The SCRAM steel (0.1wt.%C-9.3%Cr-2.26%W-V-Ti-N) that quenching+tempering was processed is by the irradiated sample that processes shown in Figure 1, sample quantities is 3, sample lower surface smooth finish rank is 3.2, side (face of D3 * L1) is bright through coated abrasive working, then sample is put in the ultrasonic cleaner and cleaned 1h with gasoline first, change afterwards acetone into and clean 0.5h, again the sample that cleans up is measured by microscope, the U-shaped breach of sample bottom to the distance B 1 of lower surface is respectively 0.059mm, 0.054mm, 0.066mm, and measure specimen width D2 by vernier caliper and be respectively 10.00mm, 10.03mm, 10.04mm, then sample is put into ion implantation apparatus and carried out two-sided ferric ion irradiation, 450 ℃ of irradiation temperature location, dosage is 10dpa, complete rear taking-up sample to be irradiated is by impact testing machine (model: XJJ-5) it is carried out impact experiment, the ballistic work that obtains is respectively 1.12J, 1.09J, 1.22J.During the D1 of sample＜0.06mm, the result is more concentrated, has certain credibility.
The above is preferred embodiment of the present invention, but the present invention should not be confined to the disclosed content of this embodiment and accompanying drawing.So everyly do not break away from the equivalence of finishing under the spirit disclosed in this invention or revise, all fall into the scope of protection of the invention.
Claims (3)
1. material ion irradiation mechanic property test method, its step comprises:
The 1st step is at U-shaped breach of upper processing of sample to be tested;
The upper surface width of sample to be tested is D2, and U-shaped breach bottom is D1 to the distance of lower surface A face, and the width of U-shaped breach is L1; D2=10mm ± 5mm, D1＜0.06mm, L1=0.2mm ± 0.05mm;
The U-shaped breach bottom of the 2nd pacing amount sample to be tested is to actual range d1 and the upper surface developed width d2 of lower surface;
The 4th step was carried out two-sided ion irradiation with sample to be tested again;
The 5th step was carried out Mechanics Performance Testing with the sample to be tested behind the irradiation, obtained test data, the tensile strength R of material after the radiation
m=F/ (d1 * d2), wherein R
mBe the tensile strength of material, F is the maximum, force that reaches in definite experimentation on the stress strain curve figure.
2. material ion irradiation mechanic property test method according to claim 1 is characterized in that, the length L 2 of sample to be tested is 80mm ± 20mm, and thickness D3 is 0.3mm ± 0.1mm, thickness D1＜0.006mm.
3. material ion irradiation mechanic property test method according to claim 1 is characterized in that, sample to be tested is the fusion reactor structured material.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105571945A (en) * | 2015-12-18 | 2016-05-11 | 中国科学院地质与地球物理研究所 | Rock in-situ micro-tension sample and test method |
| CN108827773A (en) * | 2018-06-19 | 2018-11-16 | 上海交通大学 | A kind of exposed material mechanic property test method |
| WO2019104510A1 (en) * | 2017-11-29 | 2019-06-06 | 中广核工程有限公司 | Method and device for evaluating degree of neutron irradiation embrittlement of nuclear power plant reactor pressure vessel |
Citations (1)
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| US4864867A (en) * | 1988-01-19 | 1989-09-12 | Battelle Development Corporation | Determining fracture mode transition behavior of solid materials using miniature specimens |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US4864867A (en) * | 1988-01-19 | 1989-09-12 | Battelle Development Corporation | Determining fracture mode transition behavior of solid materials using miniature specimens |
Non-Patent Citations (2)
| Title |
|---|
| 伊熙光等: ""金属夏比（U型缺口）冲击试验方法"", 《中华人民共和国国家标准GB229-84》, 24 February 1984 (1984-02-24), pages 1 - 3 * |
| 庞世倜等: ""烧结金属摩擦材料抗拉强度的测定"", 《中华人民共和国国家标准GB/T10423-2002》, 9 April 2002 (2002-04-09), pages 1 - 4 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105571945A (en) * | 2015-12-18 | 2016-05-11 | 中国科学院地质与地球物理研究所 | Rock in-situ micro-tension sample and test method |
| WO2019104510A1 (en) * | 2017-11-29 | 2019-06-06 | 中广核工程有限公司 | Method and device for evaluating degree of neutron irradiation embrittlement of nuclear power plant reactor pressure vessel |
| GB2583292A (en) * | 2017-11-29 | 2020-10-21 | China Nuclear Power Eng Company Ltd | Method and device for evaluating degree of neutron irradiation embrittlement of nuclear power plant reactor pressure vessel |
| GB2583292B (en) * | 2017-11-29 | 2023-03-08 | China Nuclear Power Eng Company Ltd | Method and device for evaluating degree of neutron irradiation embrittlement of nuclear power plant reactor pressure vessel |
| CN108827773A (en) * | 2018-06-19 | 2018-11-16 | 上海交通大学 | A kind of exposed material mechanic property test method |
| CN108827773B (en) * | 2018-06-19 | 2020-12-18 | 上海交通大学 | Method for testing mechanical properties of irradiated material |
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