ASTM-B771 Historical Revision Information
Standard Test Method for Short Rod Fracture Toughness of Cemented Carbides

ASTM-B771 - 2011 EDITION - SUPERSEDED
Show Complete Document History

Document Center Inc. is an authorized dealer of ASTM standards.
The following bibliographic material is provided to assist you with your purchasing decision:

Standard Test Method for Short Rod Fracture Toughness of Cemented Carbides
ORDER

Scope

1.1 This test method covers the determination of the fracture toughness of cemented carbides (KIcSR) by testing slotted short rod or short bar specimens.

1.2 The values stated in SI units are to be regarded as 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.

Significance and Use

The property KIcSR determined by this test method is believed to characterize the resistance of a cemented carbide to fracture in a neutral environment in the presence of a sharp crack under severe tensile constraint, such that the state of stress near the crack front approaches tri-tensile plane strain, and the crack-tip plastic region is small compared with the crack size and specimen dimensions in the constraint direction. A KIcSR value is believed to represent a lower limiting value of fracture toughness. This value may be used to estimate the relation between failure stress and defect size when the conditions of high constraint described above would be expected. Background information concerning the basis for development of this test method in terms of linear elastic fracture mechanics may be found in Refs (1-4).

This test method can serve the following purposes:

To establish, in quantitative terms significant to service performance, the effects of fabrication variables on the fracture toughness of new or existing materials, and

To establish the suitability of a material for a specific application for which the stress conditions are prescribed and for which maximum flaw sizes can be established with confidence.

Keywords

ICS Number Code 77.160 (Powder metallurgy)

To find similar documents by ASTM Volume:

02.05 (Metallic and Inorganic Coatings; Metal Powders and Metal Powder Products)

To find similar documents by classification:

77.160 (Powder metallurgy Including sintered metal materials and hardmetals)

This document comes with our free Notification Service, good for the life of the document.

This document is available in either Paper or PDF format.

Document Number

ASTM-B771-11

Revision Level

2011 EDITION

Status

Superseded

Modification Type

Revision

Publication Date

Nov. 1, 2011

Document Type

Test Method

Page Count

8 pages

Committee Number

B09.06