Unified understanding of the formation of unique fracture surface region in vacuum environment

真空环境下独特断裂面区域形成的统一认识

• 批准号: 23760081
• 负责人: OGUMA Hiroyuki
• 金额: $ 2.91万
• 依托单位: Hokkaido University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (B)
• 财政年份: 2011
• 资助国家: 日本
• 起止时间: 2011 至 2012
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-23760081/
• 关键词: 疲労; 内部破壊; 疲労き裂進展; 破面形成機構

To clarify the formation mechanism and the process of forming the granular region, which is a unique phenomenon in the very high cycle fatigue, fatigue tests using specimens with an artificial defect were conducted in vacuum. The fatigue tests were based on the idea that the environment around sub-surface fatigue crack is vacuum-like environment. During the tests, fracture surfaces were intentionallycontacted. Fracture surface observations revealed that repeating contacts of the fracture surfaces and vacuum environment are necessary for the formation of the granular region.A new mechanism for the formation of the granular region was proposed.

为了阐明超高周疲劳中特有的粒状区的形成机制和形成过程，在真空中使用带有人工缺陷的试样进行疲劳试验。疲劳试验是基于亚表面疲劳裂纹周围环境为类真空环境的思想。在试验过程中，断裂面被有意接触。断口形貌观察表明，断口的反复接触和真空环境是颗粒区形成的必要条件，并提出了颗粒区形成的新机制。

项目成果

Fatigue crack propagation properties of Ti-6Al-4V in vacuum environments

• DOI: 10.1016/j.ijfatigue.2012.02.012
• 发表时间: 2013-05-01
• 期刊: INTERNATIONAL JOURNAL OF FATIGUE
• 影响因子: 6
• 作者: Oguma, H.;Nakamura, T.
• 通讯作者: Nakamura, T.

チタン合金の真空環境下で見られる特異な破面領域の形成因子

真空环境下观察到的钛合金独特断裂面区域形成因素

• 发表时间: 2013
• 作者: 小熊博幸;中村孝;高久和明
• 通讯作者: 高久和明

チタン合金の真空環境下でみられる特異な破面領域の形成機構

真空环境下钛合金独特断裂面区域的形成机制

• 发表时间: 2013
• 作者: 高久和明;中村孝;小熊博幸;中山慎也
• 通讯作者: 中山慎也