| Microstructures and properties of welded joint of TiNi shape memory alloy and stainless steel |
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| 引用本文： | 邱小明,孙大谦,李明高,刘卫红. Microstructures and properties of welded joint of TiNi shape memory alloy and stainless steel[J]. 中国有色金属学会会刊, 2004, 14(3): 475-479 |
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| 作者姓名： | 邱小明 孙大谦 李明高 刘卫红 |
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| 作者单位： | SchoolofMaterialsScienceandEngineering,JilinUniversity,Changchun130025,China |
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| 摘 要： | The fracture characteristics of the joint were analyzed by means of scanning electron microscope(SEM).Microstructures of the joint were examined by means of optical microscope, SEM and an image analyzer. The results show that the tensile strength of the inhomogeneous joint of TiNi shape memory alloy and stainless steel is lower than that of the homogeneous joint and a plastic field appears in the heat affected zone on the side of TiNi shape memory alloy. Because TiNi shape memory alloy and stainless steel melted, a brittle as-cast structure was formed in the weld. The tensile strength and the shape memory effect of the inhomogeneous joint are strongly influenced by the changes of composition and structure of the joint. Measures should be taken to reduce the base metal melting and prevent the weld metal from the invasion by O for improving the properties of the TiNi shape memory alloy and stainless steel inhomogeneous joint.
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| 关 键 词： | TiNi合金 形状记忆合金 不锈钢 焊接接头 显微结构 性能 SEM |
Microstructures and properties of welded joint of TiNi shape memory alloy and stainless steel |
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| QIU Xiao-ming,SUN Da-qian,LI Ming-gao,LIU Wei-hong. Microstructures and properties of welded joint of TiNi shape memory alloy and stainless steel[J]. Transactions of Nonferrous Metals Society of China, 2004, 14(3): 475-479 |
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| Authors: | QIU Xiao-ming SUN Da-qian LI Ming-gao LIU Wei-hong |
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| Abstract: | The fracture characteristics of the joint were analyzed by means of scanning electron microscope(SEM).Microstructures of the joint were examined by means of optical microscope, SEM and an image analyzer. The results show that the tensile strength of the inhomogeneous joint of TiNi shape memory alloy and stainless steel is lower than that of the homogeneous joint and a plastic field appears in the heat affected zone on the side of TiNi shape memory alloy. Because TiNi shape memory alloy and stainless steel melted, a brittle as-cast structure was formed in the weld. The tensile strength and the shape memory effect of the inhomogeneous joint are strongly influenced by the changes of composition and structure of the joint. Measures should be taken to reduce the base metal melting and prevent the weld metal from the invasion by O for improving the properties of the TiNi shape memory alloy and stainless steel inhomogeneous joint. |
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| Keywords: | TiNi shape memory alloy stainless steel welding tensile strength structure |
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