Logo

ASTM C1421-18

Current Revision

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

$99.00

$99.00

$178.20

$119.00

$119.00

$214.20



Sub Total (1 Item(s))

$ 0.00

Estimated Shipping

$ 0.00

Total (Pre-Tax)

$ 0.00


Stay effortlessly up-to-date with the latest standard revisions. When new versions are released, they're automatically charged and delivered to you, ensuring seamless compliance.

Document Preview Not Available...

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.

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.


5.1 Fracture toughness, KIc, is a measure of the resistance to crack extension in a brittle material. These test methods may be used for material development, material comparison, quality assessment, and characterization.

5.2 The pb and the vb fracture toughness values provide information on the fracture resistance of advanced ceramics containing large sharp cracks, while the sc fracture toughness value provides this information for small cracks comparable in size to natural fracture sources. Cracks of different sizes may be used for the sc method. If the fracture toughness values vary as a function of the crack size it can be expected that KIsc will differ from KIpb and KIvb. Table 1 tabulates advantages, disadvantages, and applicability of each method.

SDO ASTM: ASTM International
Document Number C1421
Publication Date Jan. 1, 2018
Language en - English
Page Count 33
Revision Level 18
Supercedes
Committee C28.01
Publish Date Document Id Type View
Jan. 1, 2018 C1421-18 Revision
Jan. 1, 2016 C1421-16 Revision
July 1, 2015 C1421-15 Revision
Dec. 1, 2010 C1421-10 Revision
May 1, 2009 C1421-09 Revision
Oct. 10, 2001 C1421-99 Revision
Oct. 10, 2001 C1421-01B Revision
Oct. 10, 2001 C1421-01A Revision
Feb. 1, 2007 C1421-01BR07 Reaffirmation