Temperature dependence of mechanical damping in Ni-Mn-Ga austenite and non-modulated martensite
Temperature dependence of mechanical damping in Ni-Mn-Ga austenite and non-modulated martensite
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DOI：
10.1016/j.scriptamat.2008.05.005
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发表时间：
2008-09-01
影响因子：
6
通讯作者：
Hannula, S. -P.
中科院分区：
文献类型：
--
作者：
Aaltio, I.;Mohanchandra, K. P.;Hannula, S. -P.
研究了Ni52.3Mn27.4Ga20.3合金在308473 K温度范围内阻尼性能的温度依赖性。该2 M马氏体结构的振动阻尼能力在高于一定应力水平时增加，这与先前观察到的孪生应力值很好地对应。这种触发应力随着温度的升高而降低。马氏体相的主要阻尼机制与孪晶界运动有关。在马氏体-奥氏体两相区中，tanS在最大应力值以上减小。(c)2008 Acta Materialia Inc.由爱思唯尔有限公司出版。保留所有权利。
The temperature dependence of damping properties of the Ni52.3Mn27.4Ga20.3 alloy was studied in the temperature range of 308473 K. The vibration damping capability of this 2M martensite structure increases above a certain stress level, corresponding well to the twinning stress values observed previously. This triggering stress decreases with increasing temperature. The dominant damping mechanism of the martensitic phase is related to the twin boundary movement. In the martensite-austenite two-phase region, tan delta decreases above a maximum stress value. (c) 2008 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.