STUDY ON OPTIMUM OF LASER-SHOCKING PARAMETERS FOR IMPROVING FATIGUE LIFE OF AIRCRAFT ALUMINUM ALLOY

Abstract

Abstract: The aircraft aluminum 2024-T62 is shock-treated by pulsed laser with the same wavelength and different pulse durations. The laser parameters, arrangements of laser optics and strengthening effects are investigated. The optimal laser-shocking parameters, i.e., a pulse durotion (FWHM) of 30ns, shot spot 7 to 10mm in diameter and pulse energy of 15-20J are obtained under the condition that the Q modulation crystal is KD*P and the laser optical system has three amplification stages. Therefore, the fatigue life of aluminum specimens is increased greatly and the maximum increasement is 23. 7 times.

Key words: Al-Cu-Mg alloy, fatigue life, laser treatment

Y. K. Zhang; G.R. Hua and X.H. Lu(Department of Mechanical Engineering, Jiangsu University of Science and Technology, Zhenjiang 212013,China)(Department of Mechanical,Engineering,Nantong Institute of Technology,Nantong 226007,China). STUDY ON OPTIMUM OF LASER-SHOCKING PARAMETERS FOR IMPROVING FATIGUE LIFE OF AIRCRAFT ALUMINUM ALLOY[J]. Acta Metallurgica Sinica (English Letters), 1998, 11(1): 61-67.

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STUDY ON OPTIMUM OF LASER-SHOCKING PARAMETERS FOR IMPROVING FATIGUE LIFE OF AIRCRAFT ALUMINUM ALLOY

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