Research on Effect of Hydrogen Environment on Fracture and Shape Memory Deformation of SMA Thin Film Microactuators and Life Prediction

氢气环境对SMA薄膜微执行器断裂和形状记忆变形的影响及寿命预测研究

• 批准号: 18560081
• 负责人: TANAKA Hiroshi
• 金额: $ 2.37万
• 依托单位: Kobe University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2006
• 资助国家: 日本
• 起止时间: 2006 至 2007
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-18560081/
• 关键词: Micromachine; Shape Memory Alloys; Actuator; Hydrogen Environment

This research was conducted for the purpose of clarifying the effect of hydrogen environment on fracture strength and cyclic shape memory deformation of TiNi thin film microactuators. Two kinds of TiNi thin film microactuators with a thickness of 4〜16 μm fabricated by the roll-bonding method and sputtering method were used in this research. Hydrogen charging was conducted by cathodic electrolysis using an acid solution. Hydrogen content increased with increasing charging time and saturated at about 2000 mass ppm. When compared at the same charging time, hydrogen content was larger for thinner film. For both kinds of TiNi thin film microactuators, delayed fracture strength of hydrogen-charged microactuators measured by the SSRT method using a developed micromaterial testing system decreased as the charging time increased and the film thickness got smaller. These results show that delayed fracture strength depends on the hydrogen content in TiNi thin film microactuators. The cyclic shape memory deformation tests were carried out in the hydrogen-charging environment. The recovery stress and strain recovery rate markedly decreased by hydrogen charging. Fatigue tests in the hydrogen-charging environment were also conducted. The obtained S-N curves (the relationship between the stress amplitude and number of cycles to failure) showed shorter fatigue life for lower stress frequency. The relationship between the maximum stress and time to rupture was independent of the stress frequency. This result means that the fatigue fracture of TiNi thin films in hydrogen environment is time-dependent fracture. Also, in this research, TiNi wire-reinforced composite actuators were developed and evaluated as a high-power actuator with small-size TiNi shape memory alloys

进行这项研究是为了阐明氢环境对Tini薄膜微抗体机的断裂强度和环状形状记忆变形的影响。这项研究使用了两种厚度为4-16μm的Tini薄膜微型抗激子，该薄膜的厚度为4-16μm。使用酸溶液通过阴极电解进行氢气。氢含量随着充电时间的增加而增加，并且在约2000质量PPM时饱和。当在同一充电时间进行比较时，较薄的薄膜氢含量较大。对于两种Tini薄膜微抗酸剂，使用已发达的微材料测试系统测量的氢荷型微型驱动器的延迟断裂强度随着充电时间的增加而减小，并且膜厚度较小。这些结果表明，延迟的断裂强度取决于Tini薄膜微乳液中的氢含量。在氢气充电环境中进行了环状记忆变形测试。回收应力和应变恢复率明显降低，氢充电率显着降低。还进行了氢气充电环境中的疲劳测试。获得的S-N曲线（应力放大器与失败的循环数之间的关系）显示出较低的应力频率疲劳寿命。最大应力与破裂时间之间的关系与应力频率无关。该结果意味着在氢环境中蒂尼薄膜的疲劳片段是时间依赖性断裂。此外，在这项研究中，蒂尼线增强复合执行器被开发并评估为具有小尺寸的Tini形状记忆合金的高功率执行器

项目成果

形状記憶合金複合材料アクチュエータの開発と破壊阻止システムへの応用

形状记忆合金复合材料执行器的研制及其在骨折预防系统中的应用

• 发表时间: 2007
• 期刊: 日本機械学会関西支部第82期定時総会講演会講演論文集
• 作者: 金子豊;樋渡保秋;小原勝彦;浅富士夫;Takashi Nagatani;Takashi Nagatani;Takashi Nagatani;Takashi Nagatani;Takashi Nagatani;Zhanpeng Lu;Zhanpeng Lu;Takashi Nagatani;Zhanpeng Lu;Takashi Nagatani;Zhanpeng Lu;Takashi Nagatani;Z. Lu;Takashi Nagatani;Takashi Nagatani;Z. Lu;Zhanpeng Lu;Zhanpeng Lu;Zhanpeng Lu;Zhanpeng Lu;Zhanpeng Lu;Zhanpeng Lu;津司 和哉
• 通讯作者: 津司 和哉

Suppression of Mode I Crack Propagation in CFRP by Using SMA Composite Actuators

使用 SMA 复合执行器抑制 CFRP 中的 I 型裂纹扩展

• 发表时间: 2007
• 作者: Kazuya;Tsushi
• 通讯作者: Tsushi

Extraction of Fiber/Matrix Micro-Debonding Fracture Toughness by Using Micro Model Composites

使用微模型复合材料提取纤维/基体微脱粘断裂韧性

• 发表时间: 2008
• 作者: Kozo;Koiwa
• 通讯作者: Koiwa

マイクロモデルを用いた繊維/樹脂界面微視はく離靭性の抽出

使用微模型提取纤维/树脂界面的微观剥离韧性

• 发表时间: 2008
• 作者: 金子豊;樋渡保秋;小原勝彦;浅富士夫;Takashi Nagatani;Takashi Nagatani;Takashi Nagatani;Takashi Nagatani;Takashi Nagatani;Zhanpeng Lu;Zhanpeng Lu;Takashi Nagatani;Zhanpeng Lu;Takashi Nagatani;Zhanpeng Lu;Takashi Nagatani;Z. Lu;Takashi Nagatani;Takashi Nagatani;Z. Lu;Zhanpeng Lu;Zhanpeng Lu;Zhanpeng Lu;Zhanpeng Lu;Zhanpeng Lu;Zhanpeng Lu;津司 和哉;Zhanpeng Lu;椋野昇平・木元岳史・佐久間淳・大下賢一・長岐滋;小岩 康三
• 通讯作者: 小岩 康三