1、Designation: D 897 08Standard Test Method forTensile Properties of Adhesive Bonds1This standard is issued under the fixed designation D 897; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number in par
2、entheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Department of Defense.INTRODUCTIONThe accuracy of the results of strength tests of adhesive bonds wil
3、l depend on the conditions underwhich the bonding process is carried out. Unless otherwise agreed upon by the manufacturer and thepurchaser, the bonding conditions shall be prescribed by the manufacturer of the adhesive. In order toensure that complete information is available to the individual cond
4、ucting the tests, the manufacturerof the adhesive shall furnish numerical values and other specific information for each of the followingvariables:(1) Procedure for preparation of surfaces prior to application of the adhesive, including the cleaningand drying of metal surfaces, and special surface t
5、reatments which are not specifically limited by thepertinent test method.(2) Complete mixing directions for the adhesive.(3) Conditions for application of the adhesive including the rate of spread or thickness of film,number of coats to be applied, whether to be applied to one or both surfaces, and
6、the conditions ofdrying where more than one coat is required.(4) Assembly conditions before application of pressure, including the room temperature, length oftime, and whether open or closed assembly is to be used.(5) Curing conditions, including the amount of pressure to be applied, the length of t
7、ime underpressure, and the temperature of the assembly when under pressure. It should be stated whether thistemperature is that of the bond line, or of the atmosphere at which the assembly is to be maintained.(6) Conditioning procedure before testing, unless a standard procedure is specified, includ
8、ing thelength of time, temperature, and relative humidity.Arange may be prescribed for any variable by the manufacturer of the adhesive if it can be assumedby the test operator that any arbitrarily chosen value within such a range or any combination of suchvalues for several variables will be accept
9、able to both the manufacturer and the purchaser of theadhesive.1. Scope1.1 This test method covers the determination of the com-parative tensile properties of the adhesive bonds of metal tometal when tested on standard shape specimens and underdefined conditions of pretreatment, temperature, and tes
10、tingmachine speed.1.2 The values stated in SI units are to be regarded as thestandard. The values given in parentheses are for informationonly.1.3 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this standar
11、d to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2B 16/B 16M Specification for Free-Cutting Brass Rod, Barand Shapes for Use in Screw Machines1This test method is under the jurisd
12、iction of ASTM Committee D14 onAdhesives and is the direct responsibility of Subcommittee D14.80 on MetalBonding Adhesives.Current edition approved Oct. 1, 2008. Published October 2008. Originallyapproved in 1949. Last previous edition approved in 2001 as D 897 011.2For referenced ASTM standards, vi
13、sit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-
14、2959, United States.B 107/B 107M Specification for Magnesium-Alloy Ex-truded Bars, Rods, Profiles, Tubes, and WireB 133 Specification for Copper Rod, Bar, and Shapes3B 139/B 139M Specification for Phosphor Bronze Rod,Bar, and ShapesB 151/B 151M Specification for Copper-Nickel-Zinc Alloy(Nickel Silve
15、r) and Copper-Nickel Rod and BarB211 Specification for Aluminum and Aluminum-AlloyBar, Rod, and WireD 907 Terminology of AdhesivesE4 Practices for Force Verification of Testing Machines2.2 Other Documents:AISI 1020 Steel Code Tables43. Terminology3.1 Many of the terms used in this test method are de
16、finedin Terminology D 907.4. Significance and Use4.1 This test method is primarily comparative. However, itdoes have application as a discriminator in determining varia-tions in adherend surface preparation parameters and adhesiveenvironmental durability. The test method has found applica-tions in c
17、ontrolling surface preparations, primer, and adhesivesystems for determining strength properties of tested systems.5. Apparatus5.1 Testing Machine, has a force measurement accuracy of61 % when calibrated in compliance with Practices E4requirements and capable of maintaining a specified rate oflading
18、 and comprising essentially the following:5.1.1 Fixed MemberA fixed or essentially stationarymember, carrying one grip.5.1.2 Movable Member, carrying a second grip.5.1.3 Grips, for holding a test specimen between the fixedmember and the movable member. Use the self-aligning type.The grips shall be a
19、ttached to the fixed and movable member,respectively, in such a way that they will move into alignmentas soon as any load is applied, so that the long axis of the testspecimen will coincide with the direction of the applied pullthrough the center line of the grip assembly. While the designof grips o
20、f this type is optional, one that has been foundsatisfactory is shown in Fig. 1.6. Test Specimens6.1 Use specimens in accordance with Fig. 2. Reuse of thespecimens is allowed by resurfacing those surface areas thatcontained the adhesive. Do this by grinding the adhesive-facedsurface flat and paralle
21、l. Metals conforming to the followingASTM specifications are recommended:Metal DesignationBrass ASTM B 16/B 16M, C3600; half-hard temperCopper ASTM B 133, C11000; hard temperAluminum ASTM B211, A92024; G3Steel AISI 1020, G10200; cold-finished barPhosphor bronze ASTM B 139/B 139M, C54400Magnesium AST
22、M B 107/B 107M, Alloy AZ61AF or M1A-F but seeD950Nickel silver ASTM B 151/B 151M, C77000; quarter-hard6.2 Test 10 specimens.6.3 Discard results if a specimen breaks at a flaw which isremote from the bond line unless such a flaw constitutes avariable, the effect of which is desired to study. Test a s
23、ubstitutespecimen to replace the discarded result.7. Adhesive7.1 Prepare areas that are to be cemented in accordance withthe recommendations of the manufacturer of the adhesive.8. Procedure8.1 Place the specimen in the grips of the testing machine;taking care to align the specimen and the grips with
24、 an3Withdrawn.4Available from American National Standards Institute (ANSI), 25 W. 43rd St.,4th Floor, New York, NY 10036, http:/www.ansi.org.Corrosion Preventive Finishin. mm116 1.5316 4.750.3125 7.93751932 15.134 193132 24.6125118 281716 3611516 43.3234 70FIG. 1 Test Grips (Cold-Rolled Steel)D89708
25、2imaginary line joining the points of attachment of the grips tothe machine. Start test loading of the specimen as quickly aspossible.8.2 Speed of Testing For all materials apply a load to thespecimen of 544.3 to 635 kg (1200 to 1400 lb)/min, or adjustthe crosshead speed of the testing machine so th
26、at the load canbe accurately determined, but not to exceed 1.3 mm/min (0.05in./min) when the machine is running idle.8.3 RecordRecord the maximum load carried by thespecimen at failure and also the following:8.3.1 The percentage of cohesion, adhesion, and contactfailures (Note 1). This will be based
27、 on a visual inspection.NOTE 1Cohesive failure may be obtained by observing how much ofthe failure has occurred in the adhesive itself. That is, if the cement hasadhered to the metal test pieces and no voids are visual, it represents a 100percent cohesive failure. Adhesion failure refers to the lack
28、 of adhering tometals being fastened. Contact failure refers to lack of glue lines being incontact due to uneven surfaces, poor pressure distribution, etc.9. Calculations9.1 Tensile strength of the specimens is the breaking load.Express the result in grams per square millimetre (pounds persquare inc
29、h) and if possible report to three significant figures.9.2 For each series of tests calculate the arithmetic mean ofall the values obtained and report as the “average value.”10. Report10.1 Report the following information:10.1.1 Complete identification of the material tested, includ-ing types, sourc
30、e, manufacturers code numbers, form, etc.10.1.2 Method of preparing test specimens,10.1.3 Average thickness of adhesive layer after formationof the joint, within 0.025 mm (0.001 in.). Describe the methodof obtaining the thickness of the adhesive layer includingprocedure, location of measurements, an
31、d range of measure-ments.10.1.4 Testing room conditions,10.1.5 Number of specimens tested,10.1.6 Speed of testing, and10.1.7 Average value of the tensile strength, with an averagevalue of the percentage of cohesion failure for the specimens.11. Precision and Bias11.1 Precision and bias for this test
32、 method is being devel-oped and will be available by December 2010.12. Keywords12.1 adhesive bond; tensile buttons; tensile strengthASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard
33、 are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif n
34、ot revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which
35、 you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,Uni
36、ted States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org).NOTE 1Surfaces of metal specimens shall be ground flat and parallel.It is preferable to grind all metal specimens at the same time.in.mmin.m14 6.4 1.129 6 0.005 28.68 6 0.1358 15.9 178 47.6FIG. 2 Test SpecimenD897083
