ASTM E1290-08e1

    Standard Test Method for Crack-Tip Opening Displacement (CTOD) Fracture Toughness Measurement (Withdrawn 2013)

    Withdrawn Standard: ASTM E1290-08e1 | Developed by Subcommittee: E08.07

    WITHDRAWN, NO REPLACEMENT


      Format Pages Price  
    PDF 15 $58.80   ADD TO CART

    Translated Version(s): Russian

    ASTM License Agreement


    -->

    Withdrawn Rationale:

    This test method covers the determination of critical crack-tip opening displacement (CTOD) values at one or more of several crack extension events, and may be used to measure cleavage crack initiation toughness for materials that exhibit a change from ductile to brittle behavior with decreasing temperature, such as ferritic steels. This test method applies specifically to notched specimens sharpened by fatigue cracking. The recommended specimens are three-point bend [SE(B)], compact [C(T)], or arc-shaped bend [A(B)] specimens. The loading rate is slow and influences of environment (other than temperature) are not covered. The specimens are tested under crosshead or clip gage displacement controlled loading.

    Formerly under the jurisdiction of Committee E08 on Fatigue and Fracture, this test method was withdrawn in January 2013 and incorporated into Test Method E1820 for Measurement of Fracture Toughness.

    For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards volume information, refer to the standard’s Document Summary page on ASTM website.

    1. Scope

    1.1 This test method covers the determination of critical crack-tip opening displacement (CTOD) values at one or more of several crack extension events, and may be used to measure cleavage crack initiation toughness for materials that exhibit a change from ductile to brittle behavior with decreasing temperature, such as ferritic steels. This test method applies specifically to notched specimens sharpened by fatigue cracking. The recommended specimens are three-point bend [SE(B)], compact [C(T)], or arc-shaped bend [A(B)] specimens. The loading rate is slow and influences of environment (other than temperature) are not covered. The specimens are tested under crosshead or clip gage displacement controlled loading.

    1.1.1 The recommended specimen thickness, B, for the SE(B) and C(T) specimens is that of the material in thicknesses intended for an application. For the A(B) specimen, the recommended depth, W, is the wall thickness of the tube or pipe from which the specimen is obtained. Superficial surface machining may be used when desired.

    1.1.2 For the recommended three-point bend specimens [SE(B)], width, W, is either equal to, or twice, the specimen thickness, B, depending upon the application of the test. (See 4.3 for applications of the recommended specimens.) For SE(B) specimens the recommended initial normalized crack size is 0.45 ao/W 0.70. The span-to-width ratio (S/W) is specified as 4.

    1.1.3 For the recommended compact specimen [C(T)] the initial normalized crack size is 0.45 ao/W 0.70. The half-height-to-width ratio (H/W) equals 0.6 and the width to thickness ratio W/B is specified to be 2.

    1.1.4 For the recommended arc-shaped bend [A(B)] specimen, B is one-half the specimen depth, W. The initial normalized crack size is 0.45 < ao/W< 0.70. The span to width ratio, S/W, may be either 3 or 4 depending on the ratio of the inner to outer tube radius. For an inner radius, r1, to an outer radius, r2, ratio of > 0.6 to 1.0, a span to width ratio, S/W, of 4 may be used. For r1/r2 ratios from 0.4 to 0.6, an S/W of 3 may be used.

    1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.

    1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.



    2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

    ASTM Standards

    E4 Practices for Force Verification of Testing Machines

    E8/E8M Test Methods for Tension Testing of Metallic Materials

    E399 Test Method for Linear-Elastic Plane-Strain Fracture Toughness K Ic of Metallic Materials

    E1820 Test Method for Measurement of Fracture Toughness

    E1823 Terminology Relating to Fatigue and Fracture Testing

    E1921 Test Method for Determination of Reference Temperature, To, for Ferritic Steels in the Transition Range


    DOI: 10.1520/E1290-08E01

    ASTM International is a member of CrossRef.