NDLI: Laser shocking of 2024 and 7075 aluminum alloys

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Laser shocking of 2024 and 7075 aluminum alloys

Content Provider	NASA Technical Reports Server (NTRS)
Author	Clauer, A. H. Fairand, B. P. Slater, J. E.
Copyright Year	1977
Description	The effect of laser generated stress waves on the microstructure, hardness, strength and stress corrosion resistance of 2024 and 7075 aluminum alloys was investigated. Pulsed CO2 and neodymium-glass lasers were used to determine the effect of wavelength and pulse duration on pressure generation and material property changes. No changes in material properties were observed with CO2 laser. The strength and hardness of 2024-T351 and the strength of 7075-T73 aluminum alloys were substantially improved by the stress wave environments generated with the neodymium-glass laser. The mechanical properties of 2024-T851 and 7075-T651 were unchanged by the laser treatment. The correlation of the laser shock data with published results of flyer plate experiments demonstrated that a threshold pressure needed to be exceeded before strengthening and hardening could occur. Peak pressures generated by the pulsed laser source were less than 7.0 GPa which was below the threshold pressure required to change the mechanical properties of 2024-T851 and 7075-T651. Corrosion studies indicated that laser shocking increased the resistance to local attack in 2024-T351 and 7075-T651.
File Size	46029278
Page Count	111
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19770010254
Archival Resource Key	ark:/13960/t6741k209
Language	English
Publisher Date	1977-02-11
Access Restriction	Open
Subject Keyword	Metallic Materials Corrosion Resistance Stress Corrosion Wavelengths Pulsed Radiation Lasers Hardening Materials Aluminum Alloys Stress Waves Microstructure Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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