Study of improvement of fatigue strength safety and weight reduction by laser peening treatment in aircraft component materials

飞机零部件材料激光喷丸处理提高疲劳强度安全性和减轻重量的研究

• 批准号: 20560068
• 负责人: OCHI Yasuo
• 金额: $ 3万
• 依托单位: The University of Electro-Communications
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2008
• 资助国家: 日本
• 起止时间: 2008 至 2010
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-20560068/
• 关键词: レーザーピーニング処理; 航空機部材; 疲労強度安全性; 疲労き裂発生; 疲労き裂進展; 疲労強度安全性向上; 疲労き裂進展抑制; 圧縮残留応力; アルミニウム合金; チタン合金; オーステナイト系ステンレス鋼; チタニウム合金; ステンレス鋼; 疲労強度信頼性向上; 軽量化; ひずみ硬化; 表面改質処理

It is very useful for the reducing of weight and the energy reduction, and the high efficiency to improve the fatigue strength reliability of machines and structures by giving high functional property. In the present study, the laser peening(LP) treatment is performed on aircraft component materials such as Al alloy, Ti alloy and stainless steels. And it is the proposes of the research to improve the fatigue strength reliability and to make clear the mechanism of the improvement. The main results are as followings, (1)In all materials used in this study, it is confirmed to improve the fatigue strength by the LP treatment, and it is clear that the improvement effects are induced from the high compressive residual stress and the strain hardening in the surface layer of the materials by the LP treatment. The restrained effects for fatigue crack propagation process are improve the pre-cracked materials by the LP treatment. And, these effects are also induced from the compressive residual stress and the crack closure effects by plastic deformation near crack tip by the LP treatment. From these results, it is clear that the LP treatment is very useful for the fatigue strength reliability improvement and the weight reduction of the aircraft component materials and other machines and structures.

它对于减轻体重和减少能量以及高效率非常有用，可以通过提供高功能性能来提高机器和结构的疲劳强度可靠性。在本研究中，对飞机组件材料（例如Al Alloy，Ti合金和不锈钢）进行了激光涂层（LP）处理。这是研究提高疲劳强度可靠性并清除改进机制的提议。主要结果是以下结果，（1）在本研究中使用的所有材料中，可以通过LP处理来提高疲劳强度，很明显，改善效果是由高压缩残留应力引起的，并且通过LP处理在材料表面层中的应变硬化。疲劳裂纹传播过程的约束作用是通过LP处理改善预折叠材料的。并且，这些作用也是由压缩残留应力和通过LP处理附近裂纹尖端附近的塑性变形所引起的。从这些结果中可以明显看出，LP处理对于疲劳强度可靠性的改善以及飞机组件材料以及其他机器和结构的重量非常有用。

项目成果

Effets of Laser Peening Treatment on High Cycle Fatigue Property of Aluminum Alloys

激光喷丸处理对铝合金高周疲劳性能的影响

• 发表时间: 2008
• 期刊: CD-ROM of MS&T (Materials Science & Technology) Conference 2008. 1
• 作者: Y. Ochi;K;Masaki;T. Matsumura;T. Kakiuchi;Y. Suzuki;Y. Sano;T. Adachi
• 通讯作者: T. Adachi

SUS316L鋼の高サイクル疲労および疲労き裂進展特性に及ぼすレーザピーニング処理の影響

激光喷丸处理对SUS316L钢高周疲劳及疲劳裂纹扩展特性的影响

• 发表时间: 2008
• 作者: 五十嵐崇亮;政木清孝;越智保雄;松村隆;佐野雄二
• 通讯作者: 佐野雄二

鍛造アルミニウム合金の高サイクル疲労特性における異方性とレーザピーニング処理の影響

各向异性和激光喷丸对锻造铝合金高周疲劳性能的影响

• 发表时间: 2011
• 期刊: 材料試験技術 第56巻
• 作者: 越智保雄;松村隆;鈴木佑司;政木清孝;柿内利文;佐野雄二;足立利文
• 通讯作者: 足立利文

Al合金の軸荷重下における高サイクル疲労強度及び疲労き裂進展特性に及ぼすLP処理の影響

LP处理对轴向载荷下铝合金高周疲劳强度及疲劳裂纹扩展特性的影响

• 发表时间: 2009
• 作者: 越智保雄;五十嵐崇亮;薗部祐介;松村隆;政木清孝;柿内利文;佐野雄二;足立隆史
• 通讯作者: 足立隆史

Laser, Shot Peening Effect on High Cycle Fatigue Property in Austenitic Stainless Steel

激光、喷丸对奥氏体不锈钢高周疲劳性能的影响

• 发表时间: 2009
• 作者: Y.Ochi;K.Masaki;T.Matsumura;Y.Sano
• 通讯作者: Y.Sano