Low frequency damping capacity in a strained Fe-Mn-Si alloy

✍ Scribed by Zhou, Z. C. ;Wen, C. E. ;Yang, H. ;Yan, Y. J.

• Book ID: 105365453
• Publisher: John Wiley and Sons
• Year: 2010
• Tongue: English
• Weight: 249 KB
• Volume: 207
• Category: Article
• ISSN: 0031-8965
• DOI: 10.1002/pssa.200925090

✦ Synopsis

Abstract

The low frequency damping capacity of a strained Fe–31.36Mn–3.15Si (wt.%) alloy has been investigated using a multifunctional internal friction apparatus (MFIFA) through the free decay and forced vibration method. The high damping source is proposed to have originated from the irreversible movements of ε/γ boundaries, being amplitude‐dependent damping. An internal friction peak appears on the internal friction–temperature curves at about 280 ^o^C during heating from room temperature to 400 ^o^C and the peak height is drastically reduced during subsequent in situ cooling. The peak height increases with increasing $\mathop T\limits^{\bullet}/f$. It has been suggested that the internal friction peak is resulted from the ε → γ transformation during heating.