CN102539321B - 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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- CN102539321B CN102539321B CN201210000975.5A CN201210000975A CN102539321B CN 102539321 B CN102539321 B CN 102539321B CN 201210000975 A CN201210000975 A CN 201210000975A CN 102539321 B CN102539321 B CN 102539321B
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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 coating quality detection field, be specifically related to detection method and the device of the coating interface bond strength based on strain-ga(u)ge technique.
Background technology
Interface bond strength is an important mechanical performance index in coating-substrate material system, has determined to a great extent reliability and the serviceable life of coating-substrate material system, is also the problem of very paying close attention in coating preparation 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 spallation method, laser scratch method etc.; These methods all have some limitations, and have the scope of application separately, also do not have a kind of method to be suitable for all kinds of coating-substrate material systems; And same method measurement data is unstable, the numerical value that method not of the same race records may differ several orders of magnitude, even can produce difference qualitatively.
The technology approaching with the present invention is laser scratch method, laser scratch method is a kind of novel coating interface bond strength detection technique, the quasistatic laser scratch measuring method and the device > > that as Granted publication number, are the < < interface bond strength of CN1296698C utilize the Long Pulse LASER quasistatic loading 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, with the corresponding laser energy of thin film basal body interface exfoliation, characterize interface bond strength, the method is applicable to various hard tool films, decorating film system, decoration functions film, DLC film, the mensuration of the interface bond strength of compound substance and other type, but equally also existing film base interfacial failure to destroy critical localisation cannot pre-determine and cannot make accurate judgement, cannot detect the defect of the coating interface bond strength of fixed point.
Summary of the invention
The object 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 foil gauge real-time online to detect the strain variation of coating load(ing) point under Laser shock loading, by the program on industrial computer, in real time the strain value detecting is converted into the stress intensity value of this point, according to the stress intensity time curve of gained, obtain the critical point of interfacial failure, utilize coating interface to destroy the corresponding stress intensity value of critical point and characterize interface bond strength.
A kind of coating interface bond strength detection method based on strain-ga(u)ge technique of the present invention, 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; Before impacting, on material surface, be coated with absorption layer, and around, paste three axle isogonism strain rosettes at pre-shock point hot spot, with STSS-1 stress detection module, gather the data of foil gauge, and in real time the strain data collecting is converted into the stress intensity of shock point by the program on industrial computer, obtain the stress intensity change curve of shock point, according to stress intensity change curve, determine that coating interface destroys critical point, and with the corresponding stress intensity value of this critical point, characterize the coating interface bond strength of this point.
Three described axle isogonism strain rosettes are comprised of three foil gauges, the method that is attached to surface of the work is outward as follows: the laser-impact spot center of take is set up random right angle coordinate system as true origin, a foil gauge is pasted along y axle, the stickup direction of two other strain is positioned at y axle both sides, become respectively 60 ° of angles with y axle, the intersection point of three foil gauge axis overlaps with true origin; In order to reduce the measuring error of foil gauge, strain gauge adhesion position apart from the distance of spot center be 3～5mm(as shown in Figure 2).
High-intensity pulsed laser action is when material surface, at material surface, produce the plasma of high temperature, high pressure, plasma explodes rapidly because continuing absorbing laser energy, bring out a high-pressure shocking wave or stress wave with certain speed to part and surrounding bamboo telegraph under coating, the shock stress ripple extrusion coating of generation also makes coating and basal body interface is stressed changes; When the stress of coating shock-produced deformation generation has exceeded the adhesion of coating and matrix, just easily on coating or faying face, germinate crackle and warped, 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, until coating finally comes off, program on industrial computer is converted into the data of stress detection module online real time collecting the stress intensity of test point in real time, obtain the stress intensity-time changing curve in test point coating shedding process, the stress intensity-time curve in analysis coating shedding process is determined the critical point of interfacial failure.
A coating interface bond strength pick-up unit based on strain-ga(u)ge technique, is comprised of laser system, locating module, workpiece clamp system, stress test device, laser power supply and power control module, industrial computer.
Described laser system comprises that pulsed laser, adjustable diaphragm, light-conducting system and focus lamp form, pulsed laser one end is connected 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 by adjustable diaphragm, light-conducting system and focus lamp.
Described workpiece clamp system comprises restraint layer, absorption layer, workpiece, fixture, worktable and feed mechanism, and worktable is arranged on feed mechanism, and fixture is positioned on worktable, and workpiece is arranged in fixture; Absorption layer is coated on surface of the work; Restraint layer covers on absorption layer; Feed mechanism is connected with industrial computer, can realize the two dimensional surface motion of workpiece.
Described locating module is comprised of He-Ne laser instrument, catoptron, focus lamp, and He-Ne laser instrument is connected with power control module with laser power supply; The laser that He-Ne laser instrument sends converges in the surface of the work of workpiece clamp system by catoptron, focus lamp.
Described stress test module is comprised of three axle isogonism strain rosettes, STSS-1 stress detection module, and three axle isogonism strain rosettes are arranged in surface of the work, and is connected with STSS-1 stress detection module, and STSS-1 stress detection module is connected with industrial computer.
Laser power supply is connected 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, by three axle isogonism strain rosettes and STSS-1 stress detection module Real-Time Monitoring, be coated with the variation of ply strain, and by the program on industrial computer, the data that detect are in real time converted into the stress intensity of test point, obtain the stress intensity-time curve of test point; According to the stress intensity-time curve of gained, determine accurately the critical point of interfacial failure, utilize stress intensity value corresponding to critical point to carry out 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, reliability is strong.
Accompanying drawing explanation
Fig. 1 is the system architecture schematic diagram that strain-ga(u)ge technique detects coating interface bond strength device;
Fig. 2 is the paste position schematic diagram of foil gauge;
1. laser instrument 2. adjustable diaphragm 3. light-conducting system 4. focus lamp 5. restraint layer 6. 3 axle isogonism strain rosette 7. absorption layer 8. workpiece 9. fixture 10. worktable 11. feed mechanism 12. STSS-1 stress detection module 13. laser power supplies and power control module 14. He-Ne laser instrument 15. industrial computer 16. catoptron 17. focus lamps.
Embodiment
Below in conjunction with accompanying drawing, describe details and the working condition of the concrete device of the present invention's proposition in detail.
A 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 that laser instrument 1, adjustable diaphragm 2, light-conducting system 3, focus lamp 4 form, laser instrument 1 one end is connected with power control module 13 with laser power supply, and the other end converges in the surface of the work of workpiece clamp system by adjustable diaphragm 2, light-conducting system 3 and focus lamp.
Described workpiece clamp system comprises restraint layer 5, absorption layer 7, workpiece 8, fixture 9, worktable 10 and feed mechanism 11, and worktable 10 is arranged on feed mechanism, and fixture 9 is positioned on worktable 10, and workpiece 8 is arranged in fixture 9; Absorption layer 7 is coated on workpiece 8 surfaces; Restraint layer 5 covers on absorption layer 7; Feed mechanism 11 is connected with industrial computer 15, can realize the two dimensional surface motion of workpiece 8.
Described locating module is comprised of He-Ne laser instrument 14, catoptron 16, focus lamp 17, and He-Ne laser instrument 14 is connected 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 by catoptron 16, focus lamp 17.
Described stress test module is comprised of three axle isogonism strain rosettes 6, STSS-1 stress detection module 12, three axle isogonism strain rosettes 6 are arranged in workpiece 8 surfaces, paste position as shown in Figure 2, the laser-impact spot center of take is set up random right angle coordinate system as true origin, a foil gauge is pasted along y axle, the stickup direction of two other strain is positioned at y axle both sides, become respectively 60 ° of angles with y axle, the intersection point of three foil gauge axis overlaps with true origin, and strain gauge adhesion position is 3～5mm apart from the distance of spot center.Three axle isogonism strain rosettes 6 are connected with STSS-1 stress detection module 12, and STSS-1 stress detection module 12 is connected with industrial computer 15.
Laser power supply is connected with laser instrument 1, He-Ne laser instrument 14 and industrial computer 15 respectively with power control module 13.
Implement the present invention and carry out following steps:
1) before impact, utilize laser power supply and power control module 13 to adjust Pulsed Laser Parameters, guarantee that single-impact just can make disbonding.
2) on workpiece 8, be coated with absorption layer 7, by the paste position shown in Fig. 2, paste three axle isogonism strain rosettes 6, and cover restraint layer 5, by the He-Ne laser instrument 14 pre-shock points in location, utilize industrial computer 15 to adjust the position of workpiece 8, make to impact hot spot and overlap with workpiece future position.
3) short pulse laser beam that laser instrument 1 sends obtains light beam after tunable gratings 2, then through light-conducting system 3, obtains the laser beam perpendicular to surface of the work direction, converges at a bit and act on workpiece 8 after convergent mirror 4;
4) laser beam is interacted and produce stress wave in coating-substrate material with absorption layer 7 by restraint layer 5, coating material is come off, three axle isogonism strain rosettes 6 are measured coating surface generation strain variation under stress wave activity, and changing value is gathered by STSS-1 stress detection module 12.
5) data that the program on industrial computer 15 collects stress detection module 12 are converted into the stress intensity of test point in real time, and be presented on industrial computer with the form of stress intensity-time curve, from the stress intensity-time curve obtaining, can judge critical point and the stress intensity value corresponding to critical point of disbonding, with this stress intensity value, carry out the bond strength at characterizing coating interface.
Detection principle of the present invention is to utilize strain-ga(u)ge technique to measure the strained situation of impacting spot center point in laser single-impact process, and by the strained situation detecting the formal output with stress intensity, the moment stress intensity value of disbonding can be undergone mutation, thereby determine and 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 site-directed quantitative and detect coating interface bond strength, (2) utilize stress detection module to gather to impact in whole impact process the strain variation situation of spot center, and utilize program that strain variation situation is converted into stress intensity situation of change, make the judgement of critical point convenient, reliable, (3) come characterizing coating interface bond strength more accurately directly perceived with the stress intensity value of critical point.
Claims (5)
1. the coating interface bond strength detection method based on 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; Before impacting, on material surface, be coated with absorption layer, and around, paste three axle isogonism strain rosettes at pre-shock point hot spot, with STSS-1 stress detection module, gather the data of foil gauge, and in real time the strain data collecting is converted into the stress intensity of shock point by the program on industrial computer, obtain the stress intensity change curve of shock point, according to stress intensity change curve, determine that coating interface destroys critical point, and with the corresponding stress intensity value of this critical point, characterize the coating interface bond strength of this 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: three described axle isogonism strain rosettes are comprised of three foil gauges, the method that is attached to surface of the work is outward as follows: the laser-impact spot center of take is set up random right angle coordinate system as true origin, a foil gauge is pasted along y axle, the stickup direction of two other foil gauge is positioned at y axle both sides, become respectively 60 ° of angles with y axle, the intersection point of three foil gauge axis overlaps with true origin; In order to reduce the measuring error of foil gauge, strain gauge adhesion position is 3～5mm apart from the distance of spot center.
3. the coating interface bond strength detection method based on strain-ga(u)ge technique as claimed in claim 1, it is characterized in that: the method for stress intensity that the described strain data by collecting is converted into shock point is as follows: coding on industrial computer, conversion expression formula used in program is:
, wherein
for stress intensity;
for equivalent plastic strain; A, B, C and n are strength of materials related coefficient, relevant with coating material, by experimental calibration;
for rate of strain,
, in formula
for the rate of strain of surveying in laser-impact process, get 10
7s
-1,
for calibration strain rate value, get 10
4s
-1; Equivalent plastic strain
, in formula
,
for principal strain,
, according to the line strain at three preferential directions of measuring
,
,
then substitution formula
solve three components of strain
,
,
, further try to achieve principal strain,
,
,
be three strain values that foil gauge is corresponding,
for the line strain of x direction,
for the line strain of y direction,
for shear strain,
for the angle of foil gauge axis and x axle, i=1,2,3.
4. the coating interface bond strength pick-up unit based on strain-ga(u)ge technique, by laser system, locating module, workpiece clamp system, stress test device, laser power supply and power control module and industrial computer, formed, it is characterized in that: described stress test device is comprised of three axle isogonism strain rosettes, STSS-1 stress detection module, three axle isogonism strain rosettes are arranged in surface of the work, and be connected with STSS-1 stress detection module, STSS-1 stress detection module is connected with industrial computer; Described laser system comprises that pulsed laser, adjustable diaphragm, light-conducting system and focus lamp form, pulsed laser one end is connected 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 by adjustable diaphragm, light-conducting system and focus lamp; Described workpiece clamp system comprises restraint layer, absorption layer, workpiece, fixture, worktable and feed mechanism, worktable is arranged on feed mechanism, and fixture is positioned on worktable, and workpiece is arranged in fixture, absorption layer is coated on surface of the work, and restraint layer covers on absorption layer; Feed mechanism is connected with industrial computer, can realize the two dimensional surface motion of workpiece; Described locating module is comprised of He-Ne laser instrument, catoptron, focus lamp, and He-Ne laser instrument is connected with power control module with laser power supply, and the laser that He-Ne laser instrument sends converges in the surface of the work of workpiece clamp system by catoptron, focus lamp.
5. the coating interface bond strength pick-up unit based on strain-ga(u)ge technique as claimed in claim 4, is characterized in that: laser power supply is connected with industrial computer with pulsed laser, 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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|---|---|---|---|---|
| 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 |
| CN105316473B (en) * | 2015-12-04 | 2018-08-28 | 杨昭 | A kind of laser-impact processing on-line checking correcting system based on Workpiece vibration frequency |
| 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 |
| 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 |
| CN111289570B (en) * | 2020-03-30 | 2021-02-26 | 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 (2)
| 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 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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-
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Patent Citations (2)
| 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 |
Non-Patent Citations (6)
| Title |
|---|
| 低碳钢珩磨过程中珩磨力的分析与试验研究;张云电等;《机电工程》;20021231;第19卷(第4期);59-61 * |
| 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》.2003,第37卷(第12期),44-47. |
| 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》.2002,第19卷(第4期),59-61. |
| 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》.2007,(第4期),6-9. * |
| 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)》.2000,第21卷(第3期),5-9. * |
| 膜-基界面结合状况应力-应变诊析技术研究;冯爱新等;《工具技术》;20031231;第37卷(第12期);44-47 * |
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