ASTM E2948-22
Standard Test Method for Conducting Rotating Bending Fatigue Tests of Solid Round Fine Wire

Standard No.

ASTM E2948-22

Release Date

2022

Published By

American Society for Testing and Materials (ASTM)

Latest

ASTM E2948-22

Scope

1.1 This test method is intended as a procedure for the performance of rotating bending fatigue tests of solid round fine wire to obtain the fatigue strength of metallic materials at a specified life in the fatigue regime where the strains (stresses) are predominately and nominally linear elastic. This test method is limited to the fatigue testing of small diameter solid round wire subjected to a constant amplitude periodic strain (stress). The methodology can be useful in assessing the effects of internal material structure, such as inclusions, in melt technique and cold work processing studies. However, there is a caveat. The strain, due to the radial strain gradient imposed by the test methodology, is a maximum at the surface and zero at the centerline. Thus the test method may not seek out the “weakest link,” largest inclusions, that govern uniaxial high cycle fatigue life where the strain is uniform across the cross section and where fatigue damage initiates at a subsurface location (1-5).2 Also, pre-strain, which can influence fatigue life, is not included in this test method. NOTE 1—The following documents, although not specifically mentioned, are considered sufficiently important to be listed in this test method: ASTM STP 566 Handbook of Fatigue Testing ASTM STP 588 Manual on Statistical Planning and Analysis for Fatigue Experiments ASTM STP 731 Tables for Estimating Median Fatigue Limits (6-8) 1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. 1.3 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 E2948-22 Referenced Document

• ANSI B4.1 Preferred limits and fits for cylindrical parts
• ASTM E177 Standard Practice for Use of the Terms Precision and Bias in ASTM Test Methods
• ASTM E1823 Standard Terminology Relating to Fatigue and Fracture Testing
• ASTM E468 Standard Practice for Presentation of Constant Amplitude Fatigue Test Results for Metallic Materials
• ASTM E691 Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
• ASTM E739 Standard Practice for Statistical Analysis of Linear or Linearized Stress-Life (S-N) and Strain-Life (949;-N) Fatigue Data
• ASTM F562 Standard Specification for Wrought 35Cobalt-35Nickel-20Chromium-10Molybdenum Alloy for Surgical Implant Applications (UNS R30035)

ASTM E2948-22 history

• 2022 ASTM E2948-22 Standard Test Method for Conducting Rotating Bending Fatigue Tests of Solid Round Fine Wire
• 2016 ASTM E2948-16a Standard Test Method for Conducting Rotating Bending Fatigue Tests of Solid Round Fine Wire
• 2016 ASTM E2948-16e1 Standard Test Method for Conducting Rotating Bending Fatigue Tests of Solid Round Fine Wire
• 2016 ASTM E2948-16 Standard Test Method for Conducting Rotating Bending Fatigue Tests of Solid Round Fine Wire
• 2014 ASTM E2948-14 Standard Test Method for Conducting Rotating Bending Fatigue Tests of Solid Round Fine Wire