ISSN:
1013-9826
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Laser shot peen-forming of sheet metal(or LasershotSM Peening) is a new plastic formingtechnique for metallic materials, which uses high-power pulsed laser replacing the tiny balls to peenthe surface of sheet metal. When the pressure of shock waves induced by laser impresses aninhomogeneous residual stresses distribution in a given depth on the surface of sheet, it responds tothe stress by elongating at the peened surface and effectively bending the sheet. In order toinvestigate the mechanism of laser shot peen-forming, the narrow strip peen-forming experimentalof aluminum alloy 6061-T6 was carried out by using a pulsed Nd:glass laser with 0.5Hzrepetition-rate. Here, under some given laser energy, laser pulse width, laser beam diameter andpulse repetition frequency and so on, the influence of shot strip interval and shot times on surfaceresidual stresses and the deformation of the sheet is analyzed. The results show that the bendingforming of the sheet metal can be found, and the peened surface of sheet metal becomes convex.That the bending increases with shot strip interval increase is not obvious, but it increases with theshot times increase in a proper range of shot times. Besides, because laser shot peen-forminggenerates compressive residual stresses on the surface, it offers many desirable characteristics inshaped metals and is a valuable technique for producing components for a range of industries
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/55/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.353-358.199.pdf
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