Characterization and Analysis of the Pseudoelastic Damping Behavior of the Fe-30Mn-6Si-5Cr Shape Memory Alloy Under Compression

Iron based Shape Memory Alloys (Fe-SMAs) are a class of materials that can exhibit Shape Memory Effect, pseudoelasticity and damping capacity. These properties are highly influenced by different parameters. This paper investigates the influence of microstructure, the second cycle, machining type and prestrain on the pseudoelastic damping capacity of the Fe-30Mn-6Si-5Cr arising during compression loading unloading cycles. This study is established through the analysis of hysteresis loops arising from dynamic sinusoidal loading-unloading tensile tests. The specific damping capacity, the dissipated energy and the loss factor were determined. Moreover, the tensile-compression loop has been realized and studied. Results show that the pseudoelastic damping in compression depends on the pre-strain. A prestrain of 8% guarantees better energy dissipation. Besides, it has been demonstrated that wire Electrical discharge machining (EDM) guarantees the pseudoelastic damping behavior of the studied alloy. In addition, a fusiform loop in tensile-compression was achieved between +2% and −2% indicating a remarkable hysteresis of the alloy under this type of stress.