Influence of SMA-induced stress on shape memory alloy metal matrix composites manufactured by continuous composite extrusion
Influence of SMA-induced stress on shape memory alloy metal matrix composites manufactured by continuous composite extrusion
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DOI：
10.1088/1361-665x/ab2d6a
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发表时间：
2019-08-01
影响因子：
4.1
通讯作者：
Tekkaya, A. E.
中科院分区：
文献类型：
--
作者：
Dahnke, C.;Pottmeyer, F.;Tekkaya, A. E.
在连续挤压成形的形状记忆合金金属基复合材料中，采用主动性能调谐和主动应变能调谐策略来改善构件的力学性能。由于嵌入的NiTi丝（SM495）的热活化，压应力被传递到周围的铝基体（AA6060）。高温拉伸试验、三点弯曲试验和缺口冲击试验显示了温度、预应变和补强体积对构件性能的影响。在拉伸试验中，可以发现强度和塑性同时增加，导致能量流产能力增加。三点弯曲试验和缺口冲击试验的结果也表明，根据试样的热处理，所需的功也有所增加。
In shape memory alloy metal matrix composites manufactured by continuous composite extrusion the strategies of active property tuning and active strain energy tuning are used for the improvement of the mechanical properties of the components. Due to the thermal activation of the embedded NiTi wires (SM495), compressive stresses are transferred to the surrounding aluminum matrix (AA6060). At elevated temperatures tensile tests, three-point-bending tests and notch impact test show the influence of temperature, prestrain and reinforcing volume on the component performance. In tensile testing, a simultaneous increase of strength and ductility can be found, leading to an increase of the energy abortion capacity. Results of the three-point-bending test and notch impact test also show an increase of the required work depending on the thermomechanical treatment of the specimens.