ASTM E 3506 : 2025

1.1This test method defines procedures for repeated thermal cycling of shape memory alloy (SMA) materials and components under constant force through partial or full phase transformation. This method measures the effect of repeated thermal cycling under constant force on transformation properties, accumulated strain, residual strain, strain evolution, and functional and structural fatigue. This test is done to provide data for material design, quality control, the selection of shape memory alloy materials, design allowables, actuator design, and failure analysis.

1.2The objective of this test method is to assess the ability of SMA material and components to meet life expectancy requirements in an actuator application. Life expectancy requirements may include structural and/or functional fatigue limits, as defined in this test method.

1.3The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

1.4This 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.

1.5This 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.