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ANSTO Publications Online >
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Please use this identifier to cite or link to this item:
http://apo.ansto.gov.au/dspace/handle/10238/4060
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| Title: | Characterization of the residual strains in iterative laser forming |
| Authors: | Knupfer, SM Paradowska, AM Kirstein, O Moore, AJ |
| Keywords: | Neutron diffraction RESIDUES LASERS Welded Joints ALUMINIUM ALLOYS DISTRIBUTION |
| Issue Date: | 1-Jan-2012 |
| Publisher: | Elsevier |
| Citation: | Knupfer, S. M., Paradowska, A. M., Kirstein, O., Moore, A. J. (2012). Characterization of the residual strains in iterative laser forming. Journal of Materials Processing Technology, 212(1), 90-99. |
| Abstract: | In laser forming, thermally induced strains transverse to the laser scan line vary with depth in the material and contribute most significantly to the desired deformation. The through-thickness transverse residual strain distribution was measured by neutron diffraction in laser-formed low carbon steel and aluminium alloy specimens. The specimens were formed with a wide range of laser line energies covering the temperature gradient mechanism (TGM) and shortening or upsetting mechanism (SM), and for single and multi-pass forming (up to 3 laser passes). Below the saturation line energy where the TGM dominates, the gradient of the through-thickness strain distribution was found to increase with increasing line energy and number of laser passes; the gradient decreased again at line energies above the saturation line energy where the efficiency of the TGM decreases. Iterative laser forming can be applied to reduce weld-induced distortions. The peak longitudinal strain measured in the weld seam of a specimen that had been straightened by iterative laser forming was also significantly reduced.(C) 2011 Elsevier B.V. All rights reserved. |
| URI: | http://dx.doi.org/10.1016/j.jmatprotec.2011.08.009 http://apo.ansto.gov.au/dspace/handle/10238/4060 |
| ISSN: | 0924-0136 |
| Appears in Collections: | Journal Articles |
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