Control of Interfacial Reaction in the Dissimilar Joints Using Shape Memory Alloy Thin Wires for the Fabrication of Medical Devices Inserted in Blood Vessel

使用形状记忆合金细线控制异种接头中的界面反应来制造插入血管的医疗器械

• 批准号: 14550703
• 负责人: UENISHI Keisuke
• 金额: $ 2.3万
• 依托单位: Osaka University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2002
• 资助国家: 日本
• 起止时间: 2002 至 2003
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-14550703/
• 关键词: Laser; Shape Memory Alloy; Stainless Steel; Micro Joining; Rapid Solidification; Biomaterials; Immersion Test; Pseudo Elasticity

In order to investigate the applicability of laser micro welding to the fabrication of medical devices, Ti-Ni based shape memory alloy biomaterials wires were micro spot melted by using YAG laser.By the optimization of laser conditions such as laser power or pulse duration, sound spot melted wires free from any defects were prepared and the width of the melted metal was reduced to about 0.2mm for the 0.15mm diameter wires. Compared with the 5U5304 wires, melting of shape memory alloy wires needed more precise control of laser conditions although it needed smaller power input.Melted metal exhibited a rapidly quenched microstructure. The spot melted wires showed 70% of tensile strength and almost the same super-elastic behavior compared with base materials. Besides, it was confirmed by immersion test and by measurement of anodic polarization curve that NT-E4 wires still retain a sound corrosion resistance in a quasi biological environment by laser spot melting.Crosswise or parallel joints was also successfully prepared by laser spot welding of wires, suggesting the laser micro welding is applicable to the fabrication of biomedical devices.

为了探讨激光微焊接在医疗器械制造中的适用性，采用YAG激光器对Ti-Ni基形状记忆合金生物材料丝进行微点熔化。制备没有任何缺陷的点熔线，并且对于0.15mm直径的线，熔化金属的宽度减小至约0.2mm。与5U5304丝相比，形状记忆合金丝的熔化虽然需要较小的功率输入，但需要更精确的激光条件控制。熔化的金属表现出快速淬火的微观结构。与基材相比，点熔线表现出 70% 的拉伸强度和几乎相同的超弹性行为。此外，通过浸泡试验和阳极极化曲线测量证实，激光点熔NT-E4线材在准生物环境中仍保持良好的耐腐蚀性能。线材激光点焊还成功制备了横向或平行接头，表明激光微焊接适用于生物医学设备的制造。

项目成果

Masaya Takatugu: "Nd-YAG Lase Micro Welding of Stainless Wire"Proceedings of the International Welding and Joining Conference.-Korea 2002. 187-192 (2002)

Masaya Takatugu：“不锈钢丝的 Nd-YAG 激光微焊接”国际焊接和连接会议论文集。-韩国 2002 年。187-192 (2002)

上西 啓介: "Ag-Cu系ろう材を用いたTi-Ni系形状記憶合金とステンレス鋼の異材接合"ぶれいず. Vol.37 No.108. 29-35 (2003)

Keisuke Uenishi：“使用 Ag-Cu 钎料金属连接 Ti-Ni 形状记忆合金和不锈钢”Breeze，第 37 卷第 29-35 期。

Masaya Takatsugu: "Nd-YAG Lase Micro Welding of Stainless Wire"Proc of the Inter.Welding and Joining Conf.-Korea 2002,Oct.28-30,Gyeongju Korea. 187-192 (2002)

Masaya Takatsugu：“不锈钢丝的 Nd-YAG 激光微焊接”Proc of the Inter.Welding and Joining Conf.-Korea 2002，10 月 28-30 日，韩国庆州。

Yasuhito Ogata: "Tensile Strength and Pseudo-elasticity of YAG Laser Spot Melted Ti-Ni Shape Memory Alloy Wires"Materials Transactions. Vol.45. 1070-1076 (2004)

Yasuhito Ogata：“YAG 激光点熔钛镍形状记忆合金丝的拉伸强度和伪弹性”材料交易。

Keisuke.Uenishi: "Microstructure and Tensile Strength of Stainless Steel Wires Micro Melted by YAG Laser"Materials Transactions. Vol.43 No.12. 3083-3087 (2002)

Keisuke.Uenishi：“YAG 激光微熔化不锈钢丝的微观结构和拉伸强度”材料交易。