Damping mechanism associated with coupling between antiferromagnetic transition and martensitic transformation

作者：Zhang Jihua^*; Peng Wenyi; Gu Suyi; Deng Huaming; Chen Shuchuan

来源：Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing, 2006, 442(1-2): 229-232.

DOI：10.1016/j.msea.2006.05.165

• twin damping
• gamma Mn-based alloy
• internal friction
• antiferromagnetic transition
• martensitic transformation

To study the relationship between the martensitic transformation and the antiferromagnetic transition and to develop new twin-based high damping materials, the internal friction and modulus in gamma Mn-based Mn-Fe and Mn-Ni alloys were measured. Three internal friction peaks were observed between -100 and 400 degrees C, namely at the Neel temperature T-N, the martensitic transformation temperature M-S and 0 degrees C. They are related to the antiferromagnetic transition, the martensitic transformation and twins in the fct phase. The first is accompanyied by a rapid decreases of modulus at TN. The third, high damping peak is similar to the one observed in Mn-Cu alloys, and is attributed to the fcc-fct martensitic transformation or to fine twins in the antiferromagnetic domains.

• 出版日期2006-12-20
• 单位上海交通大学