Microstructure and residual stress improvement in wire and arc additively manufactured parts through high-pressure rolling
Microstructure and residual stress improvement in wire and arc additively manufactured parts through high-pressure rolling
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DOI：
10.1016/j.jmatprotec.2013.04.012
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发表时间：
2013-10-01
影响因子：
6.3
通讯作者：
Cozzolino, Luis D.
中科院分区：
文献类型：
--
作者：
Colegrove, Paul A.;Coules, Harry E.;Cozzolino, Luis D.
通过线弧增材制造（WAAM）制造的零件可能具有显著的残余应力和变形，以及大的晶粒尺寸。为了克服这些问题，线性沉积的钢WAAM部件上的每一层都用具有与沉积层类似形状的“成型”辊或“开槽”辊轧制，其中凹槽防止横向变形。两种辊都减少了变形和表面粗糙度，但开槽辊证明更有效-消除变形。测量了轧制WAAM部件中的残余应力，其低于未轧制的对照样本中的残余应力-特别是邻近基板的残余应力。轧制也诱导额外的晶粒细化时，轧制材料在随后的沉积过程中被重新加热。滚动的应用可能是实现WAAM在大型结构上的关键技术。(c)2013爱思唯尔有限公司版权所有。
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.