CN102539321A - Method and device for detecting bonding strength of coating interface based on strain disc technology - Google Patents
Method and device for detecting bonding strength of coating interface based on strain disc technology Download PDFInfo
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- CN102539321A CN102539321A CN2012100009755A CN201210000975A CN102539321A CN 102539321 A CN102539321 A CN 102539321A CN 2012100009755 A CN2012100009755 A CN 2012100009755A CN 201210000975 A CN201210000975 A CN 201210000975A CN 102539321 A CN102539321 A CN 102539321A
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Abstract
The invention relates to the field of coating quality detection, particularly to a method and a device for detecting bonding strength of a coating interface based on the strain disc technology. A triaxial equiangular strain rosette is adopted for the real-time on-line detection of the strain variation of the coating at a loading point under the laser loading, the detected strain value is converted in real time into the stress intensity value of the loading point through program of an industrial computer, the destructive critical point of the interface can be obtained as per the obtained stress intensity time curve, and the interface bonding strength can be displayed through the stress intensity value corresponding to the destructive critical point of the coating interface. The method and the device can be used for quantitatively detecting the bonding strength of the coating interface at a fixed point, are simple to operate, and are highly reliable.
Description
Technical field
The present invention relates to the coating quality detection range, be specifically related to detection method and device based on the coating interface bond strength of strain-ga(u)ge technique.
Background technology
Interface bond strength is an important mechanical performance index in the coating-substrate material system, has determined the reliability and the serviceable life of coating-substrate material system to a great extent, also is the problem of very paying close attention in the production of coatings process; The method that is commonly used to measure coating-substrate material interface bond strength has: scarification, indentation method, pulling method, shearing method, bending method, laser slabbing method, laser scratch method etc.; All there is certain limitation in these methods, and the scope of application is separately arranged, and also do not have a kind of method to be suitable for all kinds of coating-substrate material systems; And unstable with a kind of method measurement data, the numerical value that method not of the same race records may differ several magnitude, even can produce difference qualitatively.
With the approaching technology of the present invention be the laser scratch method; The laser scratch method is a kind of novel coating interface bond strength detection technique; Like Granted publication number is that " the quasistatic laser scratch measuring method and the device of interface bond strength " of CN1296698C utilizes the Long Pulse LASER quasistatic that loads continuously to load coating or film test piece surface; Utilize the thermal effect of laser that surface film is peeled off; Laser beam forms cut at film surface; Characterize interface bond strength with the pairing laser energy of thin film basal body interface exfoliation; This method is applicable to the mensuration of the interface bond strength of various hard tool films, decorating film system, decoration functions film, DLC film, compound substance and other type, can't confirm in advance and can't make accurate judgement, can't detect the defective of the coating interface bond strength of fixed point but equally also exist film base interfacial failure to destroy critical localisation.
Summary of the invention
The objective of the invention is to provide a kind of coating interface bond strength detection method and device based on strain-ga(u)ge technique; Adopt the foil gauge real-time online to detect the strain variation of coating load(ing) point under laser loads; In real time detected strain value is converted into the stress intensity value of this point through the program on the industrial computer; According to the critical point that the stress intensity time curve of gained obtains interfacial failure, utilize coating interface to destroy the pairing stress intensity value of critical point and characterize interface bond strength.
A kind of coating interface bond strength detection method of the present invention based on strain-ga(u)ge technique; Adopt pulsed laser to act on coating surface as external drive source; Regulate optical maser wavelength, burst length, laser energy and spot diameter, guarantee that single-impact just can make disbonding; On material surface, be coated with absorption layer before impacting; And outside around the preparatory shock point hot spot, paste three isogonism strain rosettes; Gather the data of foil gauge with STSS-1 stress detection module; And in real time the strain data that collects is converted into the stress intensity of shock point through the program on the industrial computer; Obtain the stress intensity change curve of shock point, confirm that according to the stress intensity change curve coating interface destroys critical point, and characterize the coating interface bond strength of this point with the pairing stress intensity value of this critical point.
Described three isogonism strain rosettes are made up of three foil gauges; The method that is attached to surface of the work outward is following: with the laser-impact spot center is that true origin is set up any rectangular coordinate system; A foil gauge is pasted along the y axle; The stickup direction of two other strain is positioned at y axle both sides, becomes 60 ° of angles respectively with the y axle, and the intersection point of three foil gauge axis overlaps with true origin; In order to reduce the measuring error of foil gauge, the foil gauge paste position is 3～5mm (as shown in Figure 2) apart from the distance of spot center.
High-intensity pulsed laser action is when material surface; Produce the plasma of high temperature, high pressure at material surface; Plasma is because of continuing to absorb laser energy blast rapidly; Bring out a high-pressure shocking wave or stress wave with certain speed to coating lower part and bamboo telegraph all around, the shock stress ripple extrusion coating of generation also makes coating and basal body interface is stressed changes; When the stress that produces when the coating shock-produced deformation has exceeded the adhesion of coating and matrix, just on coating or faying face, germinate crackle easily and song sticks up, and finally cause bursting apart, peel off and coming off of coating; In this process; The ess-strain of shock point place coating is constantly changing; Finally come off until coating; Program on the industrial computer is converted into the stress intensity of test point with the data in real time of stress detection module online real time collecting, obtains the stress intensity-time changing curve in the test point coating shedding process, analyzes the critical point that stress intensity-time curve in the coating shedding process is confirmed interfacial failure.
A kind of coating interface bond strength pick-up unit based on strain-ga(u)ge technique is made up of laser system, locating module, workpiece clamp system, stress test device, laser power supply and power control module, industrial computer.
Described laser system comprises pulsed laser, adjustable diaphragm, light-conducting system and focus lamp composition; Pulsed laser one end links to each other with power control module with laser power supply, and the laser that pulsed laser sends converges in the surface of the work of workpiece clamp system through adjustable diaphragm, light-conducting system and focus lamp.
Described workpiece clamp system comprises restraint layer, absorption layer, workpiece, anchor clamps, worktable and feed mechanism, and worktable is installed on the feed mechanism, and anchor clamps are positioned on the worktable, and workpiece is installed in the anchor clamps; Absorption layer is coated on surface of the work; Restraint layer covers on the absorption layer; Feed mechanism links to each other with industrial computer, can realize the two dimensional surface motion of workpiece.
Described locating module is made up of He-Ne laser instrument, catoptron, focus lamp, and the He-Ne laser instrument links to each other with power control module with laser power supply; The laser that the He-Ne laser instrument sends converges in the surface of the work of workpiece clamp system through catoptron, focus lamp.
Described stress test module is made up of three isogonism strain rosettes, STSS-1 stress detection module, and three isogonism strain rosettes are arranged in surface of the work, and links to each other with STSS-1 stress detection module, and STSS-1 stress detection module links to each other with industrial computer.
Laser power supply links to each other with industrial computer with laser instrument, He-Ne laser instrument respectively with power control module.
The invention has the advantages that and utilize pulsed laser action in coating surface; The ess-strain of coating is changed; Be coated with the variation of ply strain through three isogonism strain rosettes and the monitoring in real time of STSS-1 stress detection module; And through the program on the industrial computer with the stress intensity that real-time detected data conversion is a test point, obtain the stress intensity-time curve of test point; Stress intensity-time curve according to gained comes the accurate critical point of confirming interfacial failure; Utilize the corresponding stress intensity value of critical point to come the interface bond strength of characterizing coating-matrix; Method and apparatus of the present invention can be realized the detection of site-directed quantitative coating interface bond strength; And simple to operate, good reliability.
Description of drawings
Fig. 1 detects the system architecture synoptic diagram of coating interface bond strength device for strain-ga(u)ge technique;
Fig. 2 is the paste position synoptic diagram of foil gauge;
1. 6. 3 isogonism strain rosettes of laser instrument 2. adjustable diaphragms, 3. light-conducting system 4. focus lamps, 5. restraint layers, 7. absorption layers, 8. workpiece 9. anchor clamps, 10. worktable 11. feed mechanisms, 12. STSS-1 stress detection module 13. laser power supplies and power control module 14. He-Ne laser instruments 15. industrial computers 16. catoptrons 17. focus lamps.
Embodiment
Specify the details and the working condition of the concrete device of the present invention's proposition below in conjunction with accompanying drawing.
A kind of coating interface bond strength pick-up unit based on strain-ga(u)ge technique forms 15 by laser system, locating module, workpiece clamp system, stress test device, laser power supply and power control module 13, industrial computer; Described impact laser system comprises laser instrument 1, adjustable diaphragm 2, light-conducting system 3, focus lamp 4 compositions; Laser instrument 1 one ends link to each other with power control module 13 with laser power supply, and the other end converges in the surface of the work of workpiece clamp system through adjustable diaphragm 2, light-conducting system 3 and focus lamp.
Described workpiece clamp system comprises restraint layer 5, absorption layer 7, workpiece 8, anchor clamps 9, worktable 10 and feed mechanism 11, and worktable 10 is installed on the feed mechanism, and anchor clamps 9 are positioned on the worktable 10, and workpiece 8 is installed in the anchor clamps 9; Absorption layer 7 is coated on workpiece 8 surfaces; Restraint layer 5 covers on the absorption layer 7; Feed mechanism 11 links to each other with industrial computer 15, can realize the two dimensional surface motion of workpiece 8.
Described locating module is made up of He-Ne laser instrument 14, catoptron 16, focus lamp 17, and He-Ne laser instrument 14 links to each other with power control module 13 with laser power supply; The laser that He-Ne laser instrument 14 sends converges in the surface of the work of workpiece clamp system through catoptron 16, focus lamp 17.
Described stress test module is made up of three isogonism strain rosettes 6, STSS-1 stress detection module 12; Three isogonism strain rosettes 6 are arranged in workpiece 8 surfaces; Paste position is as shown in Figure 2, is that true origin is set up any rectangular coordinate system with the laser-impact spot center, and a foil gauge is pasted along the y axle; The stickup direction of two other strain is positioned at y axle both sides; Become 60 ° of angles respectively with the y axle, the intersection point of three foil gauge axis overlaps with true origin, and the foil gauge paste position is 3～5mm apart from the distance of spot center.Three isogonism strain rosettes 6 link to each other with STSS-1 stress detection module 12, and STSS-1 stress detection module 12 links to each other with industrial computer 15.
Laser power supply links to each other with laser instrument 1, He-Ne laser instrument 14 and industrial computer 15 respectively with power control module 13.
Embodiment of the present invention is carried out following steps:
1) utilizes laser power supply and power control module 13 adjustment pulse laser parameters before the impact, guarantee that single-impact just can make disbonding.
2) coating absorption layer 7 on workpiece 8; Paste three isogonism strain rosettes 6 by paste position shown in Figure 2, and cover restraint layer 5, through the preparatory shock point in He-Ne laser instrument 14 location; Utilize the position of industrial computer 15 adjustment workpiece 8, the impact hot spot is overlapped with the workpiece future position.
3) short pulse laser beam sent of laser instrument 1 obtains light beam after tunable gratings 2, obtains the laser beam perpendicular to the surface of the work direction through light-conducting system 3 then, acts on the workpiece 8 through converging at any behind the convergent mirror 4;
4) laser beam interacts with absorption layer 7 through restraint layer 5 and in the coating-substrate material, produces stress wave; Coating material is come off; Three isogonism strain rosettes 6 are measured coating surface generation strain variation under the stress wave activity, and changing value is gathered by STSS-1 stress detection module 12.
5) the data in real time that stress detection module 12 is collected of the program on the industrial computer 15 is converted into the stress intensity of test point; And be presented on the industrial computer with the form of stress intensity-time curve; Can judge the critical point of disbonding and the stress intensity value of critical point correspondence, the bond strength of using this stress intensity value to come the characterizing coating interface from the stress intensity-time curve that obtains.
Detection principle of the present invention is to utilize the strained situation of impacting spot center point in the strain-ga(u)ge technique Laser Measurement single-impact process; And with of the form output of detected strained situation with stress intensity; The moment stress intensity value of disbonding can be undergone mutation; Thereby confirm to peel off critical point, and utilize the stress intensity value that peels off critical point to characterize the interface bond strength of this point.
Utilize strain-ga(u)ge technique to detect the advantage of coating interface bond strength: (1) can realize that site-directed quantitative detects the coating interface bond strength; (2) utilize the stress detection module to gather the strain variation situation of impacting spot center in the whole impact process; And utilize program that the strain variation situation is converted into the stress intensity situation of change; Make the judgement of critical point convenient, reliable, (3) come the characterizing coating interface bond strength more accurately directly perceived with the stress intensity value of critical point.
Claims (8)
1. based on the coating interface bond strength detection method of strain-ga(u)ge technique; It is characterized in that: adopt pulsed laser to act on coating surface as external drive source; Regulate optical maser wavelength, burst length, laser energy and spot diameter, guarantee that single-impact just can make disbonding; On material surface, be coated with absorption layer before impacting; And outside around the preparatory shock point hot spot, paste three isogonism strain rosettes; Gather the data of foil gauge with STSS-1 stress detection module; And in real time the strain data that collects is converted into the stress intensity of shock point through the program on the industrial computer; Obtain the stress intensity change curve of shock point, confirm that according to the stress intensity change curve coating interface destroys critical point, and characterize the coating interface bond strength of this point with the pairing stress intensity value of this critical point.
2. the coating interface bond strength detection method based on strain-ga(u)ge technique as claimed in claim 1; It is characterized in that: described three isogonism strain rosettes are made up of three foil gauges; The method that is attached to surface of the work outward is following: with the laser-impact spot center is that true origin is set up any rectangular coordinate system, and a foil gauge is pasted along the y axle, and the stickup direction of two other strain is positioned at y axle both sides; Become 60 ° of angles respectively with the y axle, the intersection point of three foil gauge axis overlaps with true origin; In order to reduce the measuring error of foil gauge, the foil gauge paste position is 3～5mm apart from the distance of spot center.
3.
。
4. based on the coating interface bond strength pick-up unit of strain-ga(u)ge technique; Form by laser system, locating module, workpiece clamp system, stress test device, laser power supply and power control module and industrial computer; It is characterized in that: described stress test module is made up of three isogonism strain rosettes, STSS-1 stress detection module; Three isogonism strain rosettes are arranged in surface of the work, and link to each other with STSS-1 stress detection module, and STSS-1 stress detection module links to each other with industrial computer.
5. the coating interface bond strength pick-up unit based on strain-ga(u)ge technique as claimed in claim 4; It is characterized in that: described laser system comprises pulsed laser, adjustable diaphragm, light-conducting system and focus lamp composition; Pulsed laser one end links to each other with power control module with laser power supply, and the laser that pulsed laser sends converges in the surface of the work of workpiece clamp system through adjustable diaphragm, light-conducting system and focus lamp.
6. the coating interface bond strength pick-up unit based on strain-ga(u)ge technique as claimed in claim 4; It is characterized in that: described workpiece clamp system comprises restraint layer, absorption layer, workpiece, anchor clamps, worktable and feed mechanism; Worktable is installed on the feed mechanism; Anchor clamps are positioned on the worktable, and workpiece is installed in the anchor clamps; Absorption layer is coated on surface of the work; Restraint layer covers on the absorption layer; Feed mechanism links to each other with industrial computer, can realize the two dimensional surface motion of workpiece.
7. the coating interface bond strength pick-up unit based on strain-ga(u)ge technique as claimed in claim 4; It is characterized in that: described locating module is made up of He-Ne laser instrument, catoptron, focus lamp, and the He-Ne laser instrument links to each other with power control module with laser power supply; The laser that the He-Ne laser instrument sends converges in the surface of the work of workpiece clamp system through catoptron, focus lamp.
8. swash the coating interface bond strength pick-up unit based on strain-ga(u)ge technique as claimed in claim 4, it is characterized in that: light device power supply links to each other with industrial computer with laser instrument, He-Ne laser instrument respectively with power control module.
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| CN201210000975.5A CN102539321B (en) | 2012-01-05 | 2012-01-05 | Method and device for detecting bonding strength of coating interface based on strain disc technology |
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| CN201210000975.5A CN102539321B (en) | 2012-01-05 | 2012-01-05 | Method and device for detecting bonding strength of coating interface based on strain disc technology |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103662077A (en) * | 2012-09-07 | 2014-03-26 | 中国飞机强度研究所 | Method for protecting strain gauge under oil-water mixture environment |
| CN105316473A (en) * | 2015-12-04 | 2016-02-10 | 杨昭 | Online detecting and correcting system for laser impact processing based on workpiece vibrating frequency |
| CN107478170A (en) * | 2017-08-29 | 2017-12-15 | 北京航空航天大学 | A kind of implementation method of fibre strain flower and smart coat integrated sensor |
| CN109030349A (en) * | 2018-09-21 | 2018-12-18 | 东莞市艾屹智能装备有限公司 | Object adhesion tester is covered on a kind of surface |
| CN109870450A (en) * | 2019-02-28 | 2019-06-11 | 中国石油大学(北京) | A kind of coating mechanical behavior online test method, equipment and system |
| CN111289570A (en) * | 2020-03-30 | 2020-06-16 | 天津大学 | Component coating debonding nondestructive testing device |
| CN111965104A (en) * | 2020-08-11 | 2020-11-20 | 湖南泰嘉新材料科技股份有限公司 | Method for evaluating adhesive strength of metal band saw blade coating |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1405553A (en) * | 2002-10-30 | 2003-03-26 | 江苏大学 | Method and apparatus for measuring sub-static laser scratch of interface jointing strength |
| CN1975394A (en) * | 2006-12-11 | 2007-06-06 | 江苏大学 | Coating interfacial bond strength detecting method and apparatus based on XRD |
| US20100131211A1 (en) * | 2008-03-12 | 2010-05-27 | Alliant Techsystems Inc. | Methods and systems for verifying sensor bond integrity and structures employing such systems |
-
2012
- 2012-01-05 CN CN201210000975.5A patent/CN102539321B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1405553A (en) * | 2002-10-30 | 2003-03-26 | 江苏大学 | Method and apparatus for measuring sub-static laser scratch of interface jointing strength |
| CN1975394A (en) * | 2006-12-11 | 2007-06-06 | 江苏大学 | Coating interfacial bond strength detecting method and apparatus based on XRD |
| US20100131211A1 (en) * | 2008-03-12 | 2010-05-27 | Alliant Techsystems Inc. | Methods and systems for verifying sensor bond integrity and structures employing such systems |
Non-Patent Citations (4)
| Title |
|---|
| 冯爱新等: "膜-基界面结合状况应力-应变诊析技术研究", 《工具技术》 * |
| 张云电等: "低碳钢珩磨过程中珩磨力的分析与试验研究", 《机电工程》 * |
| 彭建祥: "Johnson-Cook本构模型和Steinberg本构模型的比较研究", 《中国优秀博硕士学位论文全文数据库（博士） 基础学科辑》 * |
| 曾丹勇等: "激光层裂技术测量涂层与基体结合强度研究", 《江苏理工大学学报（自然科学版）》 * |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103662077A (en) * | 2012-09-07 | 2014-03-26 | 中国飞机强度研究所 | Method for protecting strain gauge under oil-water mixture environment |
| CN103662077B (en) * | 2012-09-07 | 2016-01-20 | 中国飞机强度研究所 | Strain-gauge means of defence under a kind of oil mixing with water substance environment |
| CN105316473A (en) * | 2015-12-04 | 2016-02-10 | 杨昭 | Online detecting and correcting system for laser impact processing based on workpiece vibrating frequency |
| CN107478170A (en) * | 2017-08-29 | 2017-12-15 | 北京航空航天大学 | A kind of implementation method of fibre strain flower and smart coat integrated sensor |
| CN107478170B (en) * | 2017-08-29 | 2019-06-28 | 北京航空航天大学 | A kind of colored implementation method with smart coat integrated sensor of fibre strain |
| CN109030349A (en) * | 2018-09-21 | 2018-12-18 | 东莞市艾屹智能装备有限公司 | Object adhesion tester is covered on a kind of surface |
| CN109870450A (en) * | 2019-02-28 | 2019-06-11 | 中国石油大学(北京) | A kind of coating mechanical behavior online test method, equipment and system |
| CN109870450B (en) * | 2019-02-28 | 2021-03-09 | 中国石油大学(北京) | Coating mechanical behavior online detection method, device and system |
| CN111289570A (en) * | 2020-03-30 | 2020-06-16 | 天津大学 | Component coating debonding nondestructive testing device |
| CN111965104A (en) * | 2020-08-11 | 2020-11-20 | 湖南泰嘉新材料科技股份有限公司 | Method for evaluating adhesive strength of metal band saw blade coating |
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