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.

为了将超细晶铜应用于实际的机械结构和部件，必须阐明其疲劳损伤形成的基本机理。本文通过对超细晶铜进行等径角挤压疲劳试验，研究了试样表面疲劳损伤的形成过程。然后，裂纹扩展行为，这是需要定量估计的疲劳寿命，进行了研究，显示裂纹扩展机制的微观结构和应力幅的依赖性。为了阐明依赖性的原因，进行了两步加载疲劳试验。通过对裂纹尖端区域损伤形成和剪切带的观察，研究了高低应力幅下裂纹扩展机制的差异。此外，还研究了应力变化对表面损伤形成行为的影响。

项目成果

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

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

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

Statistical description of the effect of Zr addition on the behavior of microcracks in Cu–6Ni–2Mn–2Sn–2Al Alloy

Zr添加对Cu-6Ni-2Mn-2Sn-2Al合金微裂纹行为影响的统计描述

• DOI: 10.1007/s10853-011-5935-4
• 发表时间: 2012
• 期刊: Journal of Materials Science
• 影响因子: 4.5
• 作者: M. Goto;Seung;K. Euh;N. Kawagoishi;Sangshik Kim;Kusno Kamil
• 通讯作者: Kusno Kamil

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