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首页> 外文期刊>Chinese journal of aeronautics >Microstructure and Martensitic Transformation Behaviors of Explosively Welded NiTi/NiTi Laminates
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Microstructure and Martensitic Transformation Behaviors of Explosively Welded NiTi/NiTi Laminates

机译：爆炸焊接NiTi / NiTi层压板的组织和马氏体转变行为

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The study is a first attempt to prepare bulk NiTi/NiTi shape memory alloy (SMA) laminates with a macroscopic heterogeneous composition by explosive welding and investigate their microstructures and martensitic transformation behaviors. After explosive welding, a perfect interfacial bonding between the two components and a reversible martensitic transformation are realized in the tandem. Results show achievement of a fine granular structure and the maximum value of microhardness near the welding interface because of the excessive cold plastic deformation and the high impact velocity during the explosive welding. Meanwhile, the effects of aging on the transformation of the welded tandem are investigated by differential scanning calorimeter (DSC) and subject to discussion. The transformation temperatures of NiTi/NiTi SMAs increase with the rise of the aging temperature. The experimental results indicate the shape memory properties of NiTi/NiTi SMA fabricated by explosive welding can be improved by optimizing the aging technology.
机译：这项研究是首次尝试通过爆炸焊接制备具有宏观异质成分的块状NiTi / NiTi形状记忆合金（SMA）层压板，并研究其微观结构和马氏体转变行为。爆炸焊接后，两个组件之间实现了完美的界面结合，并实现了可逆的马氏体相变。结果表明，由于爆炸性焊接过程中过大的冷塑性变形和高冲击速度，在焊接界面附近实现了精细的颗粒结构和显微硬度的最大值。同时，通过差示扫描量热仪（DSC）研究了时效对焊接级联转变的影响，并进行讨论。 NiTi / NiTi SMAs的转变温度随着时效温度的升高而升高。实验结果表明，通过优化时效工艺可以改善爆炸焊接制备的NiTi / NiTi SMA的形状记忆性能。

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