1、Designation:E190-14NTERNATIONALStandard Test Method forGuided Bend Test for Ductility of WeldsThis standard is issued under the fixed designation E190;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number
2、 in parentheses indicates the year of last reapproval.Asuperscript epsilon(s)indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the U.S.Department of Defense.1.Scope3.2 Additional welding terms including defect,1.1 This test met
3、hod covers a guided bend test for thediscontinuity,flaw,thermal cutting,weld root,weld face,anddetermination of soundness and ductility of welds in ferrousweldment are defined in AWS A3.0M/A3.0:2010.and nonferrous products.Flaws,not shown by X rays,may4.Summary of Test Methodappear in the surface of
4、 a specimen when it is subjected toprogressive localized overstressing.This guided bend test has4.1 The specimen is bent in a U-shaped die by means of abeen developed primarily for plates and is not intended to becentrally applied force to the weldment in a flat specimensubstituted for other methods
5、 of bend testing.supported at two positions equidistant from the line of forceapplication.The specimen is forced into the die by a plunger1.2 The values stated in inch-pound units are to be regardedhaving the shape necessary to produce the desired contour.Theas standard.The values given in parenthes
6、es are mathematicalconvex surface of the bent specimen is examined for cracks orconversions to SI units that are provided for information onlyother open flaws.and are not considered standard.1.3 This standard does not purport to address all of the5.Significance and Usesafety concerns,if any,associat
7、ed with its use.It is the5.1 The guided bend test as described in this test method isresponsibility of the user of this standard to establish appro-used to evaluate the quality of welds as a function of ductilitypriate safety and health practices and determine the applica-as evidenced by their abili
8、ty to resist cracking during bending.bility of regulatory limitations prior to use.6.Apparatus2.Referenced Documents6.1 The guided bend test jig is shown in Fig.1.2.1 ASTM Standards:2E6 Terminology Relating to Methods of Mechanical Testing7.Sampling2.2 AWS Standard:7.1 Sample accord with the require
9、ments of relevant speci-fications and codes.AWS A3.0M/A3.0 Standard Welding Terms and Definitions;Including Terms for Adhesive Bonding,Brazing,8.Test SpecimensSoldering,Thermal Cutting,and Thermal Spraying8.1 The types of specimens generally used for guided bendtesting are rectangular ones machined
10、from plates and pipes.3.TerminologyThe weld-face surface of the flat specimen contains the greater3.1 Terms in this standard are defined in E6 Terminologywidth of the weld material,while the opposite side is called theRelating to Methods of Mechanical Testing.weld-root surface.8.1.1 Transverse Side
11、Bend-The weld is transverse to thelongitudinal axis of the specimen,which is bent so that eitherThis test method is under the jurisdiction of ASTM Committee E28 onone of the side surfaces becomes the convex surface of the bentMechanical Testing and is the direct responsibility of Subcommittee E28.02
12、 onspecimen(Fig.2 and Fig.3).Ductility and Formability.8.1.2 Transverse Face Bend-The weld is transverse to theCurrent edition approved May 1,2014.Published September 2014.Originallylongitudinal axis of the specimen,which is bent so that theapproved in 1961.Last previous edition approved in 2008 as
13、E190-92(2008).DOI:10.1520/E0190-14.weld-face surface becomes the convex surface of the bentFor referenced ASTM standards,visit the ASTM website,www.astm.org,orspecimen(Fig.4).contact ASTM Customer Service at serviceastm.org.For Annual Book of ASTM8.1.3 Transverse Root Bend-The weld is transverse to
14、theStandards volume information,refer to the standards Document Summary page onlongitudinal axis of the specimen,which is bent so that thethe ASTM website.3 Available from American Welding Society(AWS),8669 NW 36 Street,#130,weld-root surface becomes the convex surface of the bentMiami,FL 33166-6672
15、,http:/www.aws.org.specimen(Fig.4).Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesE190-14Hardened Rollers 1 diaTapped Hole to suitmay be substitutedTesting Machinefor Jig ShouldersAs requiredAs required:!PlungerShoulders HardenedandGreased
16、GRadNB Rad-YokeDRadThickness of Specimenin.(mm)A,in.(mm)B,in.(mm)C,in.(mm)D,in.(mm)(9.5)1(38)34(19)2(60)16(30)(3.2)2(54)16(27)2(60)16(30)t4t2t6t+(+3.2)3t+V6(+1.6)NoTE 1-Either hardened and greased shoulders or hardened rollers free to rotate shall be used.NorE 2-The shoulders or rollers shall have a
17、 minimum width of 2 in.(50.8 mm)for the placement of the specimen.NorE 3-The length of the specimen shall be such that the ends will not interfere with the seating of the specimen.Nor 4-The plunger shall be fitted with an appropriate base and provisions for attachment to the testing machine;and shal
18、l be designed to minimizedeflection and misalignment.Nor 5-The die member shall be ftted with an appropriate base designed to safeguard against deflection or misalignment and equipped with meansfor keeping the shoulders or rollers over the midpoint and aligned with respect to the plunger.FIG.1 Guide
19、d Bend Test Jig6 in min1/8 max rad卜十大￥W大Tt￥Note 1t,in.(mm)T,in.to 1(9.5 to 38)1(38)See Note 1 aboveNorE 1-Cut along this line when t exceeds 1 in.Edge may be thermally cut and may or may not be machined.NorE 2-If thermally cut,machine not less than s in.from edgesNorE 3-For plates over 1%in.(38 mm)t
20、hick,cut specimen into approximately equal strips between and 1(19 and 38 mm)wide and test eachstrip.FIG.2 Side-Bend Specimen for Ferrous Materials8.1.4 Longitudinal Face Bend-The weld is parallel to the8.1.5 Longitudinal Root Bend-The weld is parallel to thelongitudinal axis of the specimen,which is bent so that the longitudinal axis of the specimen,which is bent so that theweld-face surface becomes the convex surface of the bent weld-root surface becomes the convex surface of the bentspecimen(Fig.5).specimen(Fig.5).
