韧性Cu-Al-Mn智能合金的热结构形状记忆效应观察

IF 1.9 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY
C. Canbay, O. Karaduman, P. A. Ibrahim, I. Ozkul
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引用次数: 0

摘要

采用电弧熔炼法制备了一种新的不同成分的Cu-Al-Mn形状记忆合金。通过热结构测试,揭示了Cu-Al基SMA的特征形状记忆效应(SME)特性。采用差示扫描量热法(DSC)测试观察了合金的可逆马氏体相变峰,作为合金SME性能的证据。为了确定合金的基本热力学参数,这些吸热和放热转变峰是通过切线微分法进行分析的,该方法由DSC分析程序在DSC曲线上手动选择的部分自动执行,通过这些分析,发现低于100°C的特征马氏体转变温度(工作温度)和合金的焓变值为直接获得。还测定了合金的其他动力学转变参数——熵变、磁滞和平衡温度。采用差热分析(DTA)方法测定了Cu-Al基Heusler合金的常见高温行为。在室温下进行的XRD和金相测试表明,合金中存在M18R和主要的2H马氏体结构,这种双马氏体结构也是通过确定合金的理论e/a比来确定的。此外,对该合金的显微硬度测试表明该合金具有高延展性。所有结果表明,表现出形状记忆效应特性的CuAlMn合金可用于智能合金应用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Thermostructural shape memory effect observations of ductile Cu-Al-Mn smart alloy
The Cu-Al-Mn shape memory alloy (SMA) with a new different composition was fabricated by arc melting method. The characteristic shape memory effect (SME) property of Cu-Al based SMA was revealed by performing thermostructural measurements. The differential scanning calorimetry (DSC) tests were taken to observe the reversible martensitic phase transformation peaks of the alloy as evidence of SME property of the alloy. To determine the basic thermodynamical parameters of the alloy, these endothermic and exothermic transformation peaks were analyzed by the tangent differentiation method that was performed automatically by the DSC analyzing program over a manually selected part on the DSC curve and by these analyses the characteristic martensitic transformation temperatures (working temperatures) that found below 100°C and the enthalpy change values of the alloy were directly obtained. The other kinetic transformation parameters of the alloy - the entropy change, hysteresis, and equilibrium temperature - were also determined. The common high-temperature behavior of the Cu-Al based Heusler alloys was detected by differential thermal analysis (DTA) measurement. The XRD and metallography tests that were conducted at room temperature showed the presence of M18R and the dominant 2H martensite structures that formed in the alloy and this dual martensitic structure was also prescribed by determining the theoretical e/a ratio of the alloy. Furthermore, the microhardness tests on the alloy demonstrated the high ductility feature of the alloy. All results demonstrated that the CuAlMn alloy exhibiting a shape memory effect property can be useful in smart alloy applications.
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来源期刊
Advances in Materials Research-An International Journal
Advances in Materials Research-An International Journal MATERIALS SCIENCE, MULTIDISCIPLINARY-
CiteScore
3.50
自引率
27.30%
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