Magnetic pulse controlled microstructure development in Co49Ni21Ga30 single crystals
Magnetic pulse controlled microstructure development in Co49Ni21Ga30 single crystals
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DOI：
10.1080/02670836.2018.1497129
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发表时间：
2018-07
影响因子：
1.8
通讯作者：
G. Gerstein;G. Firstov;Y. Chumlyakov;P. Krooss;T. Niendorf;A. Dalinger;H. Maier
中科院分区：
文献类型：
--
作者：
G. Gerstein;G. Firstov;Y. Chumlyakov;P. Krooss;T. Niendorf;A. Dalinger;H. Maier
高达0.6 T的脉冲磁场（MF）通过改变MF与Co49Ni21Ga30磁性形状记忆合金单晶中的磁性和微结构之间的相互作用过程的动力学而导致精细微结构的产生。本文讨论了脉冲和永久MF对Co49Ni21Ga30相变行为的影响。与施加机械应力或永久MF相比，脉冲MF可以在应力诱导马氏体中导致不同的微观结构适应过程。在脉冲磁场中，观察到CoNiGa合金马氏体结构中新的纳米孪晶系统的发展和微尺度下精细磁畴的形成。
A pulsed magnetic field (MF) up to 0.6 T leads to the generation of fine microstructure through the change in the dynamics of the interaction process between the MF and the magnetic- and microstructure in Co49Ni21Ga30 magnetic shape memory alloy single crystals. This paper addresses the impact of pulsed and permanent MF on the transformation behaviour in Co49Ni21Ga30. A pulsed MF can result in different microstructural accommodation processes in stress-induced martensite, as compared to an application of a mechanical stress or permanent MF. In a pulsed MF, the development of new nano-twin systems in the martensitic structure of the CoNiGa alloy and the formation of fine magnetic domains at the microscale are observed.