Evaluation of shape memory effect and damping characteristics of Cu-Al-Be-Mn shape memory alloys

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• 作者：A.G. Shivasiddaramaiah ; ^{agssit@rediffmail.com" class="auth_mail" title="E-mail the corresponding author} ; U.S. Mallik ^{usm_sit@yahoo.co.in" class="auth_mail" title="E-mail the corresponding author} ; L. Shivaramu ^{shivaram112@gmail.com" class="auth_mail" title="E-mail the corresponding author} ; S. Prashantha ^{spsit@rediffmail.com" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Shape memory alloy ; Shape memory effect ; Cu&ndash ; Al&ndash ; Be&ndash ; Mn ; Damping ; DMA
• 刊名：Perspectives in Science
• 出版年：2016
• 出版时间：September 2016
• 年：2016
• 卷：8
• 期：Complete
• 页码：244-246
• 全文大小：956 K

文摘

Among different shape memory alloys, copper (Cu) based alloys were the most favourable alloys, because of their attaining price and good characteristic properties. In this present work different weight compositions of Cu–Al–Be–Mn shape memory alloys are considered and are in the range of 10–14 wt% of aluminium (Al), 0.4–0.5 wt% of beryllium (Be) and 0.3–0.4 wt% of manganese (Mn) and these alloys were synthesized by ingot metallurgy, which exhibits β-phase at higher temperatures, also demonstrates a shape memory effect (SME) after quenching to room temperature. The Be, Mn and Al content was varied in different sets to study the shape memory effect and damping behaviour of the alloys by using differential scanning calorimetry and dynamic mechanical analyzer respectively. These alloys exhibit higher damping or internal friction in the martensitic condition and internal friction or damping peak in the transition zone.