ASTM B646-19
Standard Practice for Fracture Toughness Testing of Aluminum Alloys

Standard No.

ASTM B646-19

Release Date

2019

Published By

American Society for Testing and Materials (ASTM)

Latest

ASTM B646-19

Scope

1.1 Fracture toughness is a key property for a number of aluminum alloys utilized in aerospace and process industries. Fracture toughness testing is often required for supplier qualification, quality control, and material release purposes. The purpose of this practice is to provide uniform test procedures for the industry, pointing out which current standards are utilized in specific cases, and providing guidelines where no standards exist. This practice provides guidance for testing (a) sheet and other products having a specified thickness less than 6.35 mm (0.250 in.), (b) intermediate thicknesses of plate, forgings, and extrusions that are too thin for valid plane-strain fracture toughness testing but too thick for treatment as sheet, such as products having a specified thickness greater than or equal to 6.35 mm (0.250 in.) but less than 25 to 50 mm (1 to 2 in.), depending on toughness level, and (c) relatively thick products where Test Method E399 is applicable. 1.2 The values stated in SI units are to be regarded as the standard. The values in inch-pound units given in parenthesis are provided for information purposes 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.4 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.

ASTM B646-19 Referenced Document

• ASTM B557 Standard Test Methods of Tension Testing Wrought and Cast Aluminum- and Magnesium-Alloy Products
• ASTM B557M Standard Test Methods of Tension Testing Wrought and Cast Aluminum- and Magnesium-Alloy Products [Metric]
• ASTM B645 Standard Practice for Plane-Strain Fracture Toughness Testing of Aluminum Alloys
• ASTM E1304 Standard Test Method for Plane-Strain (Chevron-Notch) Fracture Toughness of Metallic Materials*， 2020-05-15 Update
• ASTM E1823 Standard Terminology Relating to Fatigue and Fracture Testing
• ASTM E399 Standard Test Method for Plane-Strain Fracture Toughness of Metallic Materials
• ASTM E561 Standard Practice for R-Curve Determination

ASTM B646-19 history

• 2019 ASTM B646-19 Standard Practice for Fracture Toughness Testing of Aluminum Alloys
• 2017 ASTM B646-17 Standard Practice for Fracture Toughness Testing of Aluminum Alloys
• 2012 ASTM B646-12 Standard Practice for Fracture Toughness Testing of Aluminum Alloys
• 2006 ASTM B646-06a Standard Practice for Fracture Toughness Testing of Aluminum Alloys
• 2006 ASTM B646-06 Standard Practice for Fracture Toughness Testing of Aluminum Alloys
• 2004 ASTM B646-04 Standard Practice for Fracture Toughness Testing of Aluminum Alloys
• 2003 ASTM B646-03 Standard Practice for Fracture Toughness Testing of Aluminum Alloys
• 1997 ASTM B646-97 Standard Practice for Fracture Toughness Testing of Aluminum Alloys