期刊
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
卷 213, 期 10, 页码 1782-1791出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jmatprotec.2013.04.012
关键词
Additive manufacture; Residual stress; Distortion; Grain refinement; Welding
资金
- Tata Steel Europe Ltd.
- EPSRC [EP/G014132/1]
Parts manufactured by Wire and Arc Additive Manufacture (WAAM) can have significant residual stress and distortion, as well as large grain sizes. To overcome these problems, each layer on a linearly deposited steel WAAM part was rolled with either a 'profiled' roller, which had a similar shape to the deposited layer, or a 'slotted' roller, in which a groove prevented lateral deformation. Both rollers reduced the distortion and surface roughness, but the slotted roller proved more effective - eliminating the distortion. The residual stresses in the rolled WAAM parts were measured and were lower than those in the unrolled control specimen - particularly adjacent to the baseplate. Rolling also induced additional grain refinement when the rolled material was reheated during the subsequent deposition pass. The application of rolling may be a key technology for enabling implementation of WAAM on large-scale structures. (c) 2013 Elsevier B.V. All rights reserved.
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