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  • ASTM
    C1421-18(2025) Standard Test Methods for Determination of Fracture Toughness of Advanced Ceramics at Ambient Temperature
    Edition: 2025
    $144.00
    Unlimited Users per year

Description of ASTM-C1421 2025

ASTM C1421-18-Reapproved2025

Active Standard: Standard Test Methods for Determination of Fracture Toughness of Advanced Ceramics at Ambient Temperature




ASTM C1421

Scope

1.1 These test methods cover the fracture toughness, KIc, determination of advanced ceramics at ambient temperature. The methods determine KIpb (precracked beam test specimen), KIsc (surface crack in flexure), and KIvb (chevron-notched beam test specimen). The fracture toughness values are determined using beam test specimens with a sharp crack. The crack is either a straight-through crack formed via bridge flexure (pb), or a semi-elliptical surface crack formed via Knoop indentation (sc), or it is formed and propagated in a chevron notch (vb), as shown in Fig. 1.

     Method Only

Appendix X4

   Crack Orientation

Appendix X5

1.6 Values expressed in these test methods are in accordance with the International System of Units (SI) and IEEE/ASTM SI 10.

1.7 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

1.8 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

1.9 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.


Keywords

advanced ceramics; chevron notch; fracture toughness; precracked beam; surface crack in flexure;


ICS Code

ICS Number Code 81.060.30 (Advanced ceramics)


DOI: 10.1520/C1421-18R25



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