Fatigue characteristics of ultrafine grained copper for the application to components

应用于部件的超细晶铜的疲劳特性

• 批准号: 23560093
• 负责人: GOTO Masahiro
• 金额: $ 3.49万
• 依托单位: Oita University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2011
• 资助国家: 日本
• 起止时间: 2011 至 2013
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-23560093/
• 关键词: 結晶粒微細化; 銅; 疲労; き裂進展; 切欠効果

For the application of ultrafine grained (UFG) copper to the actual machine structures and components, the fundamental mechanism of fatigue damage formation should be clarified. In the present study, the fatigue tests of UFG copper processed by ECAP were conducted to study formation process of fatigue damage on the specimen surface. Then the crack growth behavior, which is needed to estimate quantitatively the fatigue life, was investigated, showing a dependency of microstructure and stress amplitudes on the crack growth mechanism. To clarify the reason for the dependency, two-step loading fatigue tests were conducted. Through the observations on the damage formation and shear banding around crack tip areas, the difference in crack growth mechanism between high and low stress amplitudes were studied. In addition to these, the effect of the stress change on the formation behavior of surface damage was studied.

为了在实际的机器结构和组件中施加超铁颗粒（UFG）铜，应阐明形成疲劳损伤的基本机制。在本研究中，进行了ECAP处理的UFG铜的疲劳测试，以研究样品表面疲劳损伤的形成过程。然后研究了裂纹生长行为，以定量疲劳寿命进行估算，显示了微观结构和应力振幅对裂纹生长机制的依赖性。为了阐明依赖性的原因，进行了两步加载疲劳测试。通过观察到损伤形成和裂纹尖端区域周围的剪切束带，研究了高应力振幅和低应激振幅之间的裂纹生长机制差异。除此之外，还研究了应力变化对表面损伤的形成行为的影响。

项目成果

Evaluation of crack growth rate and growth model of ultrafine grained copper

超细晶铜裂纹扩展速率及扩展模型评价

• 发表时间: 2011
• 期刊: WIT Transactions of Modeling and Simulation
• 作者: Shota Hasunuma;Takeshi Ogawa;Masanori Kikuchi;Masahiro Goto,Seung-Zeon Han,Kwangjun Euh,Joo-Hee Kang,Kusno Kamil,Norio Kawagoishi,Sangshik Kim
• 通讯作者: Masahiro Goto,Seung-Zeon Han,Kwangjun Euh,Joo-Hee Kang,Kusno Kamil,Norio Kawagoishi,Sangshik Kim

Small crack growth behavior and evaluation of growth rate of copper processed by equal channel angular pressing

等通道角压加工铜的小裂纹扩展行为及扩展速率评价

• 发表时间: 2012
• 期刊: International Journal of Modern Physics, C-series
• 作者: Kusno Kamil;Masahiro Goto;Sueng- Zeon Han;Kwangjun. Euh;Norio Kawagoishi;Sangshik Kim
• 通讯作者: Sangshik Kim

Fatigue strength of aluminium cast alloy in plant oil

铸造铝合金在植物油中的疲劳强度

• 发表时间: 2014
• 期刊: Key Engineering Materials
• 作者: Norio Kawagoishi;Kohji Kariya;Y. Maeda;E. Kinoshita;Qiang Chen. Masahiro Goto
• 通讯作者: Qiang Chen. Masahiro Goto

超微細粒銅の疲労損傷に及ぼす低温焼なましの影響

低温退火对超细晶铜疲劳损伤的影响

• 发表时间: 2014
• 作者: 手島規博,後藤真宏;Han Seungzeon,山内康太郎,薬師寺輝敏
• 通讯作者: Han Seungzeon,山内康太郎,薬師寺輝敏

The relationship between shear bands and crack growth behavior in ultrafine grained copper processed by severe plastic deformation

剧烈塑性变形加工的超细晶铜剪切带与裂纹扩展行为的关系

• 发表时间: 2011
• 期刊: Key Engineering Materials
• 作者: Hiroyuki Kuramae;Yasunori Nakamura;Hidetoshi Sakamoto;Hideo Morimoto and Eiji Nakamachi;E. Pieczyska and H. Tobushi;Masahiro Goto,Seungzeon Han,Yuji Yokoho,Kazuya Nakajima,Sangshik Kim,Kwangjun Euh
• 通讯作者: Masahiro Goto,Seungzeon Han,Yuji Yokoho,Kazuya Nakajima,Sangshik Kim,Kwangjun Euh