材料
Online ISSN : 1880-7488
Print ISSN : 0514-5163
ISSN-L : 0514-5163
論文
レーザーピーニングによる残留応力に及ぼす静的負荷および疲労負荷の影響
堺 崇弘秋田 貢一大谷 眞一佐野 雄二齋藤 利之
著者情報
ジャーナル フリー

2008 年 57 巻 7 号 p. 648-653

詳細
抄録

The effect of static and fatigue loading on the residual stress induced by laser peening has been investigated on the aluminum alloy JIS A2024-T3. X-ray diffraction was applied to laser-peened samples to measure surface residual stress before and after subjecting the sample to static tensile or fatigue loading. Plastic deformation of the internal surfaces before and after loading was evaluated from the diffraction peak width associated with the loading. During static tensile loading, the interior of the sample started to deform plastically due to the superposition of external loading and residual tensile stress that compensated for the surface compression by laser peening; this resulted in the relaxation of the surface residual stress after unloading. In the case of fatigue loading, the residual stress on the surface was relaxed during the first loading cycle due to the same mechanism as that observed in the static tensile loading. The degree of the relaxation could be estimated taking the results of the static loading into account. Significant further relaxation was not observed after the first cycle until just before the final fracture.

著者関連情報
© 2008 日本材料学会
前の記事 次の記事
feedback
Top