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1、JIS UDC 620.1 79.1 6534.2254-16 JAPANESE INDUSTRIAL STANDARD Methods for measurement on ultrasonic velocity of solid by pulse technique using reference test pieces Translated and Published by Japanese Standards Association Printed in Japan 16s Copyright Japanese Standards Association Provided by IHS
2、 under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/13/2007 23:08:22 MDTNo reproduction or networking permitted without license from IHS -,-,- J I S Z*2353 91 4933608 0088372 b In the event of any doubt arising, the original Standard in Japanese is to be fi
3、nal authority. Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/13/2007 23:08:22 MDTNo reproduction or networking permitted without license from IHS -,-,- JIS Z*2353 71 4733608 0088373 8 - - _ UDC 6
4、20.179.16:534.22:54-16 JAPANESE INDUSTRIAL STANDARD J I S Methods for measurement on ultrasonic Z 2353-1991 velocity of solid by pulse technique using reference test pieces 1. Scope This Japanese Industrial Standard specifies the methods for measurement of the ultrasonic velocity in solids by .the u
5、ltrasonic pulse echo method and transmission method using reference test pieces and methods for indicating the results of measurement. Remarks: The following Standards are cited in this Standard: JIS C 3501-Radio-Frequency Coaxial Cables JIS Z 2300-Glossary of Terms Used in Nondestructive Testing JI
6、S Z 2344-General Rule of Ultrasonic Testing of Metals by the Pulse Echo Technique JIS Z 2345-Standard Test Blocks for Ultrasonic Testing JIS Z 2355-Methods for Measurement of Thickness by Ultrasonic Pulse Echo Technique 2. Definition The definitions of the main terms used in this Standard shall be a
7、s specified in JIS Z 2300 and JIS Z 2355. 3. Measuring devices and materials 3.1 Ultrasonic velocity measuring device One of the following ultrasonic velocity measuring devices shall be used: Measuring devices which directly indicate the ultrasonic velocity The performance of measuring devices which
8、 directly indicate the ultrasonic velocity shall allow direct digital indication of the ultrasonic velocity to at least 4 significant figures. Ultrasonic thickness meter with indicator This meter is A-sean display ultrasonic flaw detector y capable of indicating the pulse intervals gn the indicator
9、by digital values. Digital ultrasonic pulse thickness meter meter shall be such as allows direct digital indication of the thickness to at least 3 significant figures. Ultrasonic flaw detector The performance of A-scan display ultrasonic flaw detectors y including the electromagnetic types y shall b
10、e such that the linearity of the time axis of the indicator is within +1 % when measured as given in Annex 1 of JIS Z 2344. The performance of this Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/1
11、3/2007 23:08:22 MDTNo reproduction or networking permitted without license from IHS -,-,- J I S Z*Z353 71 9 4733608 0088374 T 9 (a) Measuring device which directly indicates the ultrasonic velocity 2 Z 2353-1991 Single-oscillator longitudinal wave vertical contact probe 3.2 Measuring frequency The f
12、requency used for measurement by the pulse echo method shall be such as can give 5 or more easilv discernible (c) Digital ultrasonic thickness Ultrasonic flaw detector meter - bottom echoes, or where this is difficult, at least 2 easily discernible bottom surface echoes. Single-oscillator transverse
13、 wave vertical contact probe Single-oscillator longitudinal wave vertical contact probe 3.3 Contact probes The contact probes used shall be as follows: Contact probes of any oscillator size may be used, but in measure- ments on a curved measuring surface by the direct contact method, the probe used
14、shall have an oscillator size small enough that the effect of such curvature can be neglected. The contact probes shall operate at the frequencies specified in 3.2. The deflection angle of the beam axis of the contact probes used for measurement shall be measured as given in Annex 1 and shall be ver
15、ified to be wihtin 1 degree. For measurement of the longitudinal wave ultrasonic velocity, the contact probes may be single-oscillator longitudinal wave vertical contact probes for use by direct contact or water immersion, or double-oscillator vertical contact probes for use by direct contact. For m
16、easurement of the transverse wave ultrasonic velocity, single- oscillator transverse wave vertical contact probes for use by direct contact shall be used. The ultrasonic velocity measuring device may be used in combi- nation with any of the contact probes listed in Table 1 . Table 1. Combinations of
17、 utrasonic velocity measuring devices and contact probes Type of contact probe I Type of ultrasonic velocity measuring device (b) Ultrasonic thickness meter with (Double-oscillator vertical indicator I contact probe) (I) (Double-oscil lator vertical I contact probe) Single-oscillator transverse wave
18、 vertical contact probe I Electromagnetic ultrasonic longi- tudinal wave vertical contact probe I Electromagnetic ultrasonic trans- verse wave vertical contact probe Note (I) The use of probes indication parenthese shall be avoided as far as possible. 3.4 Measuring systems The systems for ultrasonic
19、 velocity measurement shall be classified as shown in Table 2 based on the ultrasonic velocity measuring device used, the combined contact probes, and the pulse signal used for ultrasonic velocity measurement. Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IH
20、S Employees/1111111001, User=Wing, Bernie Not for Resale, 03/13/2007 23:08:22 MDTNo reproduction or networking permitted without license from IHS -,-,- e JIS ZS2353 71 W 4733608 0088375 I 3 2 2353-1991 Table 2, Ultrasonic velocity measuring systems Measuring system Multiple-echo system (.B,-B, syste
21、m) Surface echo and first bottom surface echo system S-B, system) Corrected point of inci- dence and first bottom (R-B; system) . surface echo system Transmission pulse system direct contact method (m system) Transmission pulse system water immersion method (Ti system) Pulse signal used for ultra- s
22、onic velocity measurement As a rule, multiple echo B, and B, ; but where a number i . 1 satis- fying the condition n2B1 can not be used, Bz shall be used as B,. Surface echo of test specimen and first bottom surface echo Starting point of measurement, corrected by use of a test piece of known thickn
23、ess, and first bottom surface echo Dispatched pulse and trans- mitted pulse (U) Starting point of measurement, corrected by use of a test piece of known thickness, and transmitted pulse ( U ) Figure (basic indication) B1 (start in R point08 measure- ment) T Copyright Japanese Standards Association P
24、rovided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/13/2007 23:08:22 MDTNo reproduction or networking permitted without license from IHS -,-,- J I S Z*Z353 71 W 4733608 0088376 3 4 Z 2353-1991 3.5 Contact probe cables The contact probe cables
25、used shall be chosen from flexible type cables such as the 1,5 D - 2 V cable specified in JIS C 3501 to obtain a stable coqtact between the contact probe and the specimen for measurement, if the characteristic impedance is equivalent. 3.6 Reference test pieces The reference test pieces used for ultr
26、asonic velocity measurement shall be selected on the basis of the difference between general and high-precision ultrasonic velocity measurement, and shall meet one of the requirements shown in Table 3. Table 3. Selection of reference test pieces Item General measurement High-precision measurement Pa
27、rallelism of front to1 oollloo back surface I 0.002/50 3.2 S 1.6 S Measured to an accuracy of within 0 . 0 5 mm. within 0,002 mm. Measured as given in 2.3 of Annex 2. 2.2 of Annex 2. Degree of finish of front and back surface Precision of thickness Measured to an accuracy of Measured as given in 2.1
28、 or Ultrasonic velocity Acoustic character- An acoustic impedance of An acoustic impedance of istics the same degree as the the same degree as the measured object is re- measured specimen is re- quired. quired. 4. PreDaration for measurement 4.1 Treatment of the measured surface The measured surface
29、 shall be treated to satisfy one of the conditions shown in Table 4, depending on the type of reference test piece used. Table 4. Treatment of measured surface Finish Of Finish of the Parallelism of the measured measured surface to the back surface back surface Measuring precision I General measurem
30、ent 3.2 S o. 011100 Same as the measured surface Same as the measured surface 1.6 S O. 002150 High-precision measurement 4.2 Selection of the contact medium in the direct contact method The contact medium shail be selected from those shown in Table 5 based on the subject of measurement-longitudinal
31、wave or transverse wave ultrasonic velocity. Measurement may be made with no contact medium where the surface of contact of the vertical contact probe is smooth and it is preliminarily determined that an acoustic combination of a measurable degree can be obtained. Copyright Japanese Standards Associ
32、ation Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/13/2007 23:08:22 MDTNo reproduction or networking permitted without license from IHS -,-,- 5 Z 2353-1991 Transverse wave ultrasonic velocity Table 5. Selection of the contact medium Hi
33、ghly viscous liquid (such as isopoly- butane), solid adhesive (such as phenyl salicylate), or other medium suitable for transverse wave propagation Type of contact medium Type of measurement wave ultrasonic velocity Spindle oil, machine oil, or the equivalent I 4.3 Adjustment Using a reference test
34、piece, required adjustments shall be made so that the figure or indicated value on the indicator shows either the thickness of the reference test piece or its ultrasonic velocity. 4.4 Calibration Calibration shall be made during measurement at least once every hour and immediately after completion o
35、f measurement, and where the calibration value differs from the previous one by a degree exceeding the prescribed value, measurement shall be made again for the concerned period. The prescribed calibration values shall be decided upon agreement between the parties concerned in consideration of the r
36、equired ultrasonic velocity precision. Calibration is mandatory in the following cases : (1) Where an abnormality in the operation of the device is suspected. (2) Where a part or the whole of the measuring device has been replaced. (3) Where the engineer in charge has been relieved by another. 5. Me
37、asuring methods 5.1 Selection of the measuring system The measuring system shall be selected from among those shown in Table 2 by consultation between the parties concerned. 5.2 Measuring methods 5.2.1 Methods using a measuring device which directly indicates the ultrasonic velocity indicates the ul
38、trasonic velocity shall be carried out as follows: Methods using a measuring device which directly (1) Method for measuring the longitudinal wave ultrasonic velocity (a) Select a reference test piece and input its thickness, and, using a longitudinal wave vertical eontact probe, adjust the ultrasoni
39、c velocity in the test piece as indicated by the B,-B, S-B, or R-B, system of Table 2 Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/13/2007 23:08:22 MDTNo reproduction or networking permitted wit
40、hout license from IHS -,-,- JIS Z*E353 9L I 4933608 0088378 7 6 Z 2353-1991 (b) Prepare the specimen, measure and set its thickness with micrometer callipers, in general to an error of within 0.05 mm (for high-precision measurement, within O. 005 mm) , measure the ultrasonic velocity of the specimen
41、 as in (a), and read its value. (2) Method for measuring the transverse wave ultrasonic velocity (a) Select a reference test piece and input its thickness, place a transverse wave vertical contact probe, in contact with the test piece through a suitable contact medium selected from those in Table 5,
42、 and adjust the ultrasonic velocity in the test piece as indicated by the B,-B, S-B, or R-BI system of Table 2 . (b) Prepare the specimen, measure and set its thickness with micrometer callipers, in general to an error of within 0.05 mm (for high-precision measurement, within O. 005 mm) , measure th
43、e ultrasonic velocity in the specimen as in (a), and read its value. 5.2.2 Methods using an ultrasonic thickness meter with indicator Methods using an ultrasonic thickness meter with an indicator shall be carried out as follows: (1) Method for measuring the londtudinal wave ultrasonic velocitv (a) S
44、elect a reference test piece and adjust to the longitudinal wave ultrasonic velocity of the test piece, measure its thickness by the B,-B, S-B,or R-B, system of Table 2 using a longitudinal wave vertical contact probe, and read its value. (b) Prepare the specimen, measure its thickness with micromet
45、er callipers in general to an error of within 0.05 mm (for high- precision measurement, within O. 005 mm) , and read the thickness of the specimen as in (a). Find the longitudinal wave ultrasonic velocity v , of the specimen from the following formula: (1) d - t . VCL .* * .,., * v . = * where, VL:
46、longitudinal wave ultrasonic velocity of the specimen (m / s) dc: t : VcL : d : thickness value of reference test piece read from the digital indicator (mm) thickness of the specimen measured mechanically (mm) longitudinal wave ultrasonic velocity of the reference test piece (mls) Thickness value of
47、 the specimen read from a digital indicator (mm) thickness of the reference test piece measured mechanically (mm) tc: Copyright Japanese Standards Association Provided by IHS under license with JSALicensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/13/2007 23:08:22 MDTNo reproduc
48、tion or networking permitted without license from IHS -,-,- J I S Z*E!353 91 4933608 0088379 9 - 7 Z 2353-1991 (2) Method for measuring the transverse wave ultrasonic velocity Select a reference test piece and adjust to its transverse wave ultrasonic velocity, place a transverse wave vertical contact probe in contact with the test piece through a suitable contact medium selected from those in Table 5, measure the thickness of the test piece by the B,-B, S-B, or R-B, system of Table 2, and read its value. Prepare t