Significance and Use
Rupture life of notched specimens is an indication of the ability of a material to deform locally without cracking under multi-axial stress conditions, thereby redistributing stresses around a stress concentrator.
The notch test is used principally as a qualitative tool in comparing the suitability of materials for designs that will contain deliberate or accidental stress concentrators.
1. Scope
1.1 These test methods cover the determination of the time for rupture of notched specimens under conditions of constant load and temperature. These test methods also includes the essential requirements for testing equipment.
1.2 The values stated in inch-pound units are to be regarded as the standard. The units 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
A453/A453M Specification for High-Temperature Bolting Materials, with Expansion Coefficients Comparable to Austenitic Steels
E1012 Practice for Verification of Specimen Alignment Under Tensile Loading
E139 Practice for Conducting Creep, Creep-Rupture, and Stress-Rupture Tests of Metallic Materials
E220 Test Method for Calibration of Thermocouples by Comparison Techniques
E4 Practices for Force Verification of Testing Machines
E6 Terminology Relating to Methods of Mechanical Testing
E633 Guide for Use of Thermocouples in Creep and Stress Rupture Testing to 1000C (1800F) in Air
E74 Practice of Calibration of Force-Measuring Instruments for Verifying the Load Indication of Testing Machines
E8 Test Methods for Tension Testing of Metallic Materials
MIL-STD-120 Gage Inspection
Index Terms
axiality; bending strain; bending stress; elongation; final notch cross-sectional area; gage length; kt factor; loading; major diameter; minor diameter; notch cross-sectional area; notch root radius; notch rupture strength; stress; stress-rupture; temperature; thermocouple; ICS Number Code 77.040.10
DOI: 10.1520/E0292-01
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Citing ASTM Standards
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