Work Item
ASTM WK75240
New Guide for Very-high cycle fatigue testing of metallic materials at ambient and elevated temperatures
1. Scope
This guide covers the recommended practices for ultra-high cycle fatigue of axial and bending fatigue of metallic materials in the cyclic fatigue life range between one million cycles and beyond where strains are predominantly or exclusively in the elastic regime through the entire test. It covers un-nothched and notched fatigue test specimens subject to both periodic forcing as well as harmonically excited subjected to constant amplitude periodic loading at room and elevated temperature. It is not intended for use on actual components.
Keywords
VHCF; Ultrasonic; kilo-hz; Fatigue
Rationale
This guide would also give guidance on current practices for very high cycle fatigue testing of 10 million cycles to 1 billion cycles or more using machines capable of high cyclic frequencies. The current fatigue standards E466 and E606 do not address some of the key issues regarding machines that can achieve frequencies in excess of 100 hz to as high as 20 khz, such as dynamic load verification, methods of control, data sampling best practices, open loop control in the case of ultrasonic test machines ect. Users of this standard would be researchers interested in creating fatigue curves that approaching the materials end use life cycle.
The title and scope are in draft form and are under development within this ASTM Committee.
Work Item Status
Date Initiated: 12-18-2020
Technical Contact: Raymond Kersey
Item: 000
Ballot:
Status: