High-damping properties of Mn–Cu sintered alloys

✍ Scribed by Mikio Fukuhara; Fuxing Yin; Yoshiaki Ohsawa; Susumu Takamori

• Publisher: Elsevier Science
• Year: 2006
• Tongue: English
• Weight: 720 KB
• Volume: 442
• Category: Article
• ISSN: 0921-5093
• DOI: 10.1016/j.msea.2006.05.163

✦ Synopsis

The mechanical damping of manganese-rich Mn-Cu sintered alloys were investigated and compared to that of M2052 cast alloy. The damping of the sintered alloys consisting of ␣-Mn and ␥-MnCu phases is of the order of 10 -1 and insensitive to the frequency and temperature. Single phase ␥-MnCu alloys, prepared by quenching from 1123 K, show two damping peaks; the large main peak is due to the twin boundaries and the small sub-peak is due to the fct ↔ fcc phase transformation. These peaks are larger than those observed for the M2052 alloy. The damping of Mn-Cu alloys aged at 723 K is insensitive to temperature.