CN105806946B - A kind of supersonic detection method for the composite material leaf joint different process stage - Google Patents
A kind of supersonic detection method for the composite material leaf joint different process stage Download PDFInfo
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Abstract
The present invention is a kind of supersonic detection method for the composite material leaf joint different process stage, and this method carries out the ultrasound detection of whole leaf joint using pulse echo formula water immersion focusing Ultrasonic C-Scan method.Water immersion focusing Ultrasonic C-Scan detection is carried out to draw up the titanium alloy inner ring for making whole leaf joint, the internal flaw of outer ring forging respectively first；Then it is detected for the linkage interface in the whole leaf joint of shaping after the winding of completion filament and inner and outer ring hot isostatic pressing, using 5~10MHz water immersion focusing probes, C-scan imaging is carried out to interface signals and bottom ripple signal respectively, complete the detection to the metal between the metal/metal interface between titanium alloy inner and outer ring and titanium alloy and silicon carbide fibre silk/fiber interface bond quality.It can enhance the internal soundness of titanium matrix composite entirety leaf joint to silicon carbide fibre using this method and interface quality is controlled comprehensively, have many advantages, such as that workable, detection sensitivity is high, testing result is directly perceived.
Description
Technical field
The present invention relates to a kind of supersonic detection methods for the composite material leaf joint different process stage, belong to non-destructive testing
Technical field.
Background technology
High thrust-weight ratio is the important indicator of following aero-engine performance, is improving the same of engine reliability and maintainability
When, mitigate engine structure weight, it is the important channel for improving thrust-weight ratio to improve the structure efficiency of engine and fuel gas temperature,
In, development is whole, lightweight engine structure is current Main Trends of The Development.Fiber-reinforced metal matrix composite is due to tool
There is the advantages of intensity is high, temperature in use is high and antifatigue and croop property is good, be subject to the wide of aero-engine research institution of various countries
General attention.Foreign countries have begun develop fiber reinforced titanium matrix composite entirety leaf joint, the structure in loss of weight, bear circumferential load
Etc. there is apparent advantage, compared with conventional wheel disc+blade construction, whole leaf joint can mitigate 70% weight, will be into
For the developing direction of following advanced engine.
Fiber reinforced titanium matrix composite entirety leaf joint is to be coated with the filament of metal coating as reinforcement, winding
In to titanium alloy after ring forging, inner and outer ring be complex as a whole through hot isostatic pressing be made, due to manufacturing process particularity and
Strong interfacial reaction etc. between fiber and metal, causes the defects of leaf joint possibly not only to be present inside inner and outer rings forging,
It it is also quite conceivable to occur at metal/metal and metal/fiber interface, great threat caused to the safe handling of product.
Therefore, carrying out reliable, effective quality control to whole leaf joint structure seems most important.At present, examined using conventional ultrasonic wave
The detection that survey technology carries out titanium alloy forging internal flaw is more mature, but for the increasingly complex fiber reinforcement titanium of structure
Based composites entirety leaf joint, each combination interface especially in leaf joint, traditional ultrasound examination means are then difficult to be applicable in.It cuts
To current, there is not been reported for the effective lossless detection method for fiber reinforced titanium matrix composite entirety leaf joint.
The content of the invention
The present invention be exactly for the above-mentioned prior art situation and to design offer a kind of for composite material leaf joint different process
The supersonic detection method in stage, the purpose is to realize comprehensive control of internal soundness and interface quality to whole leaf joint,
Have many advantages, such as that workable, detection sensitivity is high, testing result is directly perceived.
The purpose of the present invention is what is be achieved through the following technical solutions：
This kind is directed to the supersonic detection method in composite material leaf joint different process stage, and the different process stage is front and rear
Two stages, first stage are to carry out Inner Defect Testing, second stage respectively for titanium alloy inner ring (7), outer shroud (8) forging
It is after completion silicon carbide fibre is wound and hot isostatic pressing is used to be complex as a whole inner ring (7), outer shroud (8), for inner ring
(7), metal/fiber circle between the metal/metal interface (10) between outer shroud (8) and titanium alloy and silicon carbide fibre silk
Face (11) is detected, and the pulse echo formula water immersion focusing Ultrasonic C-Scan detecting system that the supersonic detection method uses includes
Supersonic detector (1), water immersion focusing probe (2), tested product (3), sink (4), autoscanner (5) and computer
(6), it is characterised in that：The step of this method, is as follows：
Step 1: the detection process of first stage is：
It is carried out using water seaoning longitudinal wave vertical incidence C-scan mode, sound wave incident direction should be vertical with forging flow lines, uses
Range-amplitude display compensated curve is made with the same or similar ultrasonic inspection reference test block of tested forging acoustic propagation characteristic, it is basic herein
As detection sensitivity, adjustment position of strobe makes it carry out disk scanning after covering region to be checked for upper gain material compensation；
Step 2: the detection process of second stage is：
The detection at the metal/metal interface (10) between inner ring (7), outer shroud (8)：
It is carried out using water immersion focusing longitudinal wave vertical incidence C-scan mode, uses flat-bottom hole buried depth and tested interface (10) institute
Detection sensitivity is adjusted in the identical titanium alloy reference block of depth, adjustment position of strobe makes interface (10) signal be located at instrument door
Interior progress interface scanning；The detection of metal/fiber interface (11) between titanium alloy and silicon carbide fibre silk (9)：
Carried out using water immersion focusing longitudinal wave vertical incidence C-scan mode, using containing at titanium alloy/fiber interface manually not
The reference block adjustment detection sensitivity of soldering defect, the buried depth of artificial defect should be identical with depth where tested interface (11),
Adjustment position of strobe makes interface (11) signal be located at progress interface scanning in instrument door, then will be identical with detected face thickness
The bottom wave reflection signal of metal/fiber interface reference block adjusts to benchmark wave height as detection sensitivity, adjusts position of strobe
The bottom ripple signal for being detected face is made to be located in instrument door and carries out the monitoring scanning of bottom ripple；
In the detection process of second stage, by adjusting the water journey distance of ultrasonic probe (2), to fall within focus tested
Depth where interface；
The ultrasonic probe (2) is 5~10MHz water immersion focusing probes.
It the characteristics of technical solution of the present invention and has the beneficial effect that：
1), the present invention is in the different manufacturing process stages of leaf joint, respectively for the titanium alloy inner and outer rings forging of leaf joint, interior,
The metal between metal/metal interface and titanium alloy and silicon carbide fibre silk/fiber interface between outer shroud carries out water logging and gathers
Burnt Ultrasonic C-Scan detection, realizes the total quality to the silicon carbide fibre enhancing titanium matrix composite leaf joint different process stage
Control.
2), the present invention carries out the detection of leaf joint using water immersion focusing Ultrasonic C-Scan detection technique, and focus detection mode can carry
High detection sensitivity, C-scan then realize the automated imaging of testing result, avoid traditional manual contact formula detection influence because
The problems such as element is more, accuracy of detection is not high, the results show is not directly perceived.
3), on the premise of penetration capacity and detection sensitivity is considered, select 5~10MHz water immersion focusing probes into
The detection of row leaf joint；When detecting metal/metal and metal/fiber interface bond quality, by adjusting ultrasonic probe
Water journey distance makes probe focus fall within depth where interface, so that Interface detection has the characteristics that highly sensitive, high s/n ratio.
4), different from conventional interface detection method, the present invention is using interface signals detection and bottom ripple monitoring two ways
The means that are combined carry out the bond quality evaluation of metal/fiber interface in leaf joint, avoid when being judged using single method, by
Cause to be orientated the unfavorable erroneous judgement problem that may be brought in interface deformation, interface quality evaluation may primarily directed to interface
There are the defects of be detected, and the combination degree at interface is characterized.
Description of the drawings
Fig. 1 is a kind of pulse echo formula water immersion focusing Ultrasonic C-Scan detecting system schematic diagram
Fig. 2 is a kind of silicon carbide fibre enhancing titanium matrix composite entirety leaf joint structure diagram
Fig. 3 is a kind of silicon carbide fibre enhancing titanium matrix composite both shoulders ring structure schematic diagram
In figure：1. supersonic detector, 2. water immersion focusing probes, 3. tested products, 4. sinks, 5. autoscanners, 6.
Computer, 7. titanium alloy inner ring, 8. titanium alloy outer shrouds, 9. filaments, 10. metal/metal interfaces, 11. metals/fiber interface.
Specific embodiment
The invention will be further described with reference to the accompanying drawings and examples.
Embodiment one
Enhance titanium matrix composite TC17 entirety leaf joints for the silicon carbide fibre that attached outer diameter shown in Fig. 2 is Φ 600mm
Ultrasound detection is carried out, the pulse echo formula water immersion focusing Ultrasonic C-Scan detecting system that the supersonic detection method uses includes super
Sonic analyzer (1), water immersion focusing probe (2), tested product (3), sink (4), autoscanner (5) and computer (6),
Referring to attached drawing 1.
The TC17 entirety leaf joint is to make titanium alloy inner ring (7), outer shroud (8) forging by forging first, is examined through ultrasound
After surveying qualification, groove is processed on inner ring (7) forging, and filament (9) is wound in the groove of inner ring (7) forging, then
Inner and outer ring is complex as a whole using hot isostatic pressing, the metal/metal between inner ring (7), outer shroud (8) is carried out using ultrasound detection
The detection of metal/fiber interface (11) between interface (10) and titanium alloy and silicon carbide fibre silk (9) finally carries out essence
Machine the making of part.
Ultrasound is carried out for different detection objects in the different manufacturing process stages of leaf joint using the method for the present invention respectively
Detection, including following steps：
Step 1: the detection process of first stage is：
For by rough machined TC17 titanium alloys inner ring (7), outer shroud (8) forging, swept using water logging longitudinal wave vertical incidence C
The mode of retouching carries out scanning.Acoustic beam incident direction should be as vertical with forging flow lines as possible, can not such as ensure completely vertically, also can be from it
Its direction incidence is detected, but should improve detection sensitivity.In view of maximum thickness to be checked up to 160mm or so, 5MHz is used
Water immersion focusing probe is to ensure penetration capacity and detection sensitivity；Aperture is used as the complete flat-bottom holes pair of the Ti6Al4V of Φ 0.8mm
Range-amplitude display compensated curve is made than test block, and is adjusted after position of strobe makes it cover region to be checked, is detected in Φ 0.8mm sensitive
Degree is lower to carry out disk scanning.
Step 2: the detection process of second stage is：
The detection at the metal/metal interface (10) between inner ring (7), outer shroud (8)：
After filament winding and inner and outer ring hip moulding is completed, for metal/gold between titanium alloy inner and outer ring
Belong to interface (10) and carry out the detection of water immersion focusing longitudinal wave vertical incidence C-scan.The difference of depth, is selected respectively according to where interface (10)
5MHz the or 10MHz water immersion focusing probes of different focal length are selected, by adjusting water distance focus are made to fall within tested interface (10) as far as possible
Place depth is detected, and water distance can refer to following formula and be calculated：
In formula：
P --- water distance during detection, unit are millimeter (mm)；
F --- the focal length of probe in water, unit are millimeter (mm)；
cMaterial--- the longitudinal wave velocity of material, unit are metre per second (m/s) (m/s)；
cWater--- the longitudinal wave velocity in water, unit are metre per second (m/s) (m/s)；
δ --- depth where tested interface, unit are millimeter (mm).
The adjustment of detection sensitivity is using the flat-bottom hole buried depth Ti6Al4V- Φ identical with depth where tested interface (10)
0.8mm reference blocks, adjustment position of strobe make interface signals be located in instrument door, boundary are carried out under Φ 0.8mm detection sensitivities
Face (10) scanning.
The detection of metal/fiber interface (11) between titanium alloy and silicon carbide fibre silk (9)：
After filament winding and inner and outer ring hip moulding is completed, for titanium alloy and silicon carbide fibre silk (9) it
Between metal/fiber interface (11) carry out the detection of water immersion focusing longitudinal wave vertical incidence C-scan.According to interface place depth not
Together, 5MHz the or 10MHz water immersion focusing probes of different focal length are selected respectively, by adjusting water distance focus are made to fall within as far as possible tested
Depth where interface (11) is detected.
According to the making requirement on artificial defect in GJB1580A-2004, processed at titanium alloy/fiber interface (11)
Artificial non-soldering defect, makes metal/fiber interface (11) ultrasonic inspection reference test block, using defect buried depth and tested interface
(11) the identical reference block adjustment detection sensitivity of depth where, adjustment position of strobe make interface signals be located at instrument door it is interior into
Row interface (11) scanning；
Then by the bottom wave reflection signal of the metal identical with detected face thickness/fiber interface reference block, adjust to
Fluorescent screen full-scale 80% is used as detection sensitivity, and adjustment instrument gate makes the bottom ripple signal for being detected face be located in instrument door
Carry out the monitoring scanning of bottom ripple.
The scanning of Integrated comparative interface and bottom ripple monitoring C-scan figure, assay surface (11) bond quality and defect situation.
Embodiment two
For attached outer diameter shown in Fig. 3 be Φ 152mm silicon carbide fibre enhance titanium matrix composite TC17 both shoulders ring into
Row ultrasound detection, the pulse echo formula water immersion focusing Ultrasonic C-Scan detecting system that the supersonic detection method uses include ultrasound
Wave inspection instrument (1), water immersion focusing probe (2), tested product (3), sink (4), autoscanner (5) and computer (6), ginseng
See attached drawing 1.
The TC17 both shoulders ring is to make titanium alloy inner ring (7), outer shroud (8) forging by forging first, through ultrasound detection
After qualification, groove is processed on inner ring (7) forging, and filament (9) is wound in the groove of inner ring (7) forging, is then adopted
Inner and outer ring is complex as a whole with hot isostatic pressing, metal/metal circle between inner ring (7), outer shroud (8) is carried out using ultrasound detection
The detection of metal/fiber interface (11) between face (10) and titanium alloy and silicon carbide fibre silk (9).
Carried out respectively in the different manufacturing process stages of both shoulders ring for different detection objects using the method for the present invention and surpassed
Sound detection, including following steps：
Step 1: the detection process of first stage is：
For by rough machined TC17 titanium alloys inner ring (7), outer shroud (8) forging, swept using water logging longitudinal wave vertical incidence C
The mode of retouching carries out scanning, and acoustic beam incident direction should be vertical with forging flow lines.Consider thickness to be checked, penetration capacity and detection spirit
Sensitivity selects 10MHz water immersion focusing probes to be detected；It is the complete flat-bottom holes of the Ti6Al4V of Φ 0.8mm to having a competition to use aperture
Block makes range-amplitude display compensated curve, and adjusts after position of strobe makes it cover region to be checked, under Φ 0.8mm detection sensitivities
Carry out disk scanning.
Step 2: the detection process of second stage is：
The detection at the metal/metal interface (10) between inner ring (7), outer shroud (8)：
After filament winding and inner and outer ring hip moulding is completed, for metal/gold between titanium alloy inner and outer ring
Belong to interface (10) and carry out the detection of water immersion focusing longitudinal wave vertical incidence C-scan.10MHz water immersion focusing probes are selected, by adjusting water
It is detected away from depth where focus is made to fall within tested interface (10), water distance can refer to following formula and be calculated：
In formula：
P --- water distance during detection, unit are millimeter (mm)；
F --- the focal length of probe in water, unit are millimeter (mm)；
cMaterial--- the longitudinal wave velocity of material, unit are metre per second (m/s) (m/s)；
cWater--- the longitudinal wave velocity in water, unit are metre per second (m/s) (m/s)；
δ --- depth where tested interface, unit are millimeter (mm).
The adjustment of detection sensitivity is using the flat-bottom hole buried depth Ti6Al4V- Φ identical with depth where tested interface (10)
0.8mm reference blocks, adjustment position of strobe make interface signals be located in instrument door, boundary are carried out under Φ 0.8mm detection sensitivities
Face (10) scanning.
The detection of metal/fiber interface (11) between titanium alloy and silicon carbide fibre silk (9)：
After filament winding and inner and outer ring hip moulding is completed, for titanium alloy and silicon carbide fibre silk (9) it
Between metal/fiber interface (11) carry out the detection of water immersion focusing longitudinal wave vertical incidence C-scan.10MHz water immersion focusing probes are selected,
By adjusting water distance focus is made to fall within tested interface (11) place depth to be detected.
According to the making requirement on artificial defect in GJB1580A-2004, processed at titanium alloy/fiber interface (11)
Artificial non-soldering defect, makes metal/fiber interface (11) ultrasonic inspection reference test block, using defect buried depth and tested interface
(11) the identical reference block adjustment detection sensitivity of depth where, adjustment position of strobe make interface signals be located at instrument door it is interior into
Row interface (11) scanning；
Then by the bottom wave reflection signal of the metal identical with detected face thickness/fiber interface reference block, adjust to
Fluorescent screen full-scale 80% is used as detection sensitivity, and adjustment instrument gate makes the bottom ripple signal for being detected face be located in instrument door
Carry out the monitoring scanning of bottom ripple.
The scanning of Integrated comparative interface and bottom ripple monitoring C-scan figure, assay surface (11) bond quality and defect situation.This hair
The bright method can enhance the different process stage of titanium matrix composite entirety leaf joint development in silicon carbide fibre, for leaf joint
Different parts be detected respectively, ultrasound detection sensitivity can be higher than Φ 0.8mm flat-bottomed hole equivalents.The present invention will be that fiber increases
The non-destructive testing of strong titanium matrix composite entirety leaf joint provides effective method, and effective mass is carried out to whole leaf joint so as to reach
The purpose of control.
Claims (1)
1. a kind of supersonic detection method for the composite material leaf joint different process stage, the different process stage is front and rear two
A stage, first stage are to carry out Inner Defect Testing respectively for titanium alloy inner ring (7), outer shroud (8) forging, and second stage is
After completion silicon carbide fibre silk is wound and hot isostatic pressing is used to be complex as a whole inner ring (7), outer shroud (8), for inner ring
(7), metal/fiber circle between the metal/metal interface (10) between outer shroud (8) and titanium alloy and silicon carbide fibre silk
Face (11) is detected, and the pulse echo formula water immersion focusing Ultrasonic C-Scan detecting system that the supersonic detection method uses includes
Supersonic detector (1), water immersion focusing probe (2), tested product (3), sink (4), autoscanner (5) and computer
(6), it is characterised in that：The step of this method, is as follows：
Step 1: the detection process of first stage is：
Carried out using water seaoning longitudinal wave vertical incidence C-scan mode, sound wave incident direction should be vertical with forging flow lines, using with quilt
It examines the identical ultrasonic inspection reference test block of forging acoustic propagation characteristic and makes range-amplitude display compensated curve, on this basis gain material
As detection sensitivity, adjustment position of strobe makes it carry out disk scanning after covering region to be checked for compensation；
Step 2: the detection process of second stage is：
The detection at the metal/metal interface (10) between inner ring (7), outer shroud (8)：
It is carried out using water immersion focusing longitudinal wave vertical incidence C-scan mode, uses flat-bottom hole buried depth and tested metal/metal interface
(10) the identical titanium alloy reference block adjustment detection sensitivity of depth where, adjustment position of strobe make metal/metal interface
(10) signal, which is located in instrument gate, carries out interface scanning；
The detection of metal/fiber interface (11) between titanium alloy and silicon carbide fibre silk (9)：
It is carried out using water immersion focusing longitudinal wave vertical incidence C-scan mode, using containing manually non-soldering at titanium alloy/fiber interface
The reference block adjustment detection sensitivity of defect, the buried depth of artificial defect should be with depth where tested metal/fiber interface (11)
Identical, adjustment position of strobe makes metal/fiber interface (11) signal be located at progress interface scanning in instrument gate, then will be with quilt
The bottom wave reflection signal of the identical metal/fiber interface reference block of face thickness is detected, is adjusted to benchmark wave height as detection spirit
Sensitivity, adjustment position of strobe make the bottom ripple signal for being detected face be located at progress bottom ripple monitoring scanning in instrument gate；
In the detection process of second stage, by adjusting the water journey distance of ultrasonic probe (2) focus is made to fall within tested interface
Place depth；
The ultrasonic probe (2) is 5~10MHz water immersion focusing probes.
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| CN108459082B (en) * | 2018-03-27 | 2021-01-05 | 润电能源科学技术有限公司 | Material detection method and material detection device |
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| CN110823146A (en) * | 2019-10-29 | 2020-02-21 | 中国航发北京航空材料研究院 | Method for ultrasonic nondestructive measurement of plate thickness |
| CN111965258B (en) * | 2020-07-08 | 2022-11-18 | 中国航发北京航空材料研究院 | Method for improving ultrasonic detection sensitivity of double-alloy blisk weld joint |
| CN115575500A (en) * | 2022-10-11 | 2023-01-06 | 天津工业大学 | Method for detecting roughness of fiber bundle reinforced resin material with large defects |
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