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.

它具有很高的功能性能，对减轻重量、降低能耗、提高机器和结构的疲劳强度、可靠性有很大的帮助。本研究对铝合金、钛合金和不锈钢等航空部件材料进行了激光强化处理。提出了提高疲劳强度可靠性的研究方向，并明确了提高疲劳强度可靠性的机理。主要研究结果如下：(1)在本研究所用的所有材料中，均证实LP处理能提高材料的疲劳强度，且明显的提高效果是由LP处理引起的材料表层的高压残余应力和应变硬化引起的。LP处理提高了预裂材料在疲劳裂纹扩展过程中的抑制作用。残余压应力和裂纹尖端附近塑性变形对裂纹闭合的影响也是造成上述效应的主要原因。从这些结果可以清楚地看出，LP处理对于提高飞机部件材料和其他机器和结构的疲劳强度可靠性和减轻重量非常有用。

项目成果

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

Effects of Laser Peening Treatment on High Cycle Fatigue and Crack Propagation Behaviors in Austenitic Stainless Teel

激光喷丸处理对奥氏体不锈钢高周疲劳和裂纹扩展行为的影响

• 发表时间: 2010
• 期刊: Journal of Power and Energy Systems, JSME 4
• 作者: K.Masaki;Y.Ochi;T.Matsumura;T.Ikarashi;Y.Sano
• 通讯作者: Y.Sano

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

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