TY - JOUR
T1 - Formation and improvement of surface waviness for additive manufacturing 5A06 aluminium alloy component with GTAW system
AU - Geng, Haibin
AU - Li, Jinglong
AU - Xiong, Jiangtao
AU - Lin, Xin
AU - Huang, Dan
AU - Zhang, Fusheng
N1 - Publisher Copyright:
© 2018, Emerald Publishing Limited.
PY - 2018
Y1 - 2018
N2 - Purpose: As known, the wire and arc additive manufacture technique can achieve stable process control, which is represented with periodic surface waviness, when using empirical methods or feedback control system. But it is usually a tedious work to further reduce it using trial and error method. The purpose of this paper is to unveil the formation mechanism of surface waviness and develop a method to diminish it. Design/methodology/approach: Two forming mechanisms, wetting and spreading and remelting, are unveiled by cross-section observation. A discriminant is established to differentiate which mechanism is valid to dominate the forming process under the given process parameters. Findings: Finally, a theoretical method is developed to optimize surface waviness, even forming a smooth surface by establishing a matching relation between heat input (line energy) and materials input (the ratio of wire feed speed to travel speed). Originality/value: Formation mechanisms are revealed by observing cross-section morphology. A discriminant is established to differentiate which mechanism is valid to dominate the forming process under the given process parameters. A mathematical model is developed to optimize surface waviness, even forming a smooth surface through establishing a matching relation between heat input (line energy) and materials input (the ratio of wire feed speed to travel speed).
AB - Purpose: As known, the wire and arc additive manufacture technique can achieve stable process control, which is represented with periodic surface waviness, when using empirical methods or feedback control system. But it is usually a tedious work to further reduce it using trial and error method. The purpose of this paper is to unveil the formation mechanism of surface waviness and develop a method to diminish it. Design/methodology/approach: Two forming mechanisms, wetting and spreading and remelting, are unveiled by cross-section observation. A discriminant is established to differentiate which mechanism is valid to dominate the forming process under the given process parameters. Findings: Finally, a theoretical method is developed to optimize surface waviness, even forming a smooth surface by establishing a matching relation between heat input (line energy) and materials input (the ratio of wire feed speed to travel speed). Originality/value: Formation mechanisms are revealed by observing cross-section morphology. A discriminant is established to differentiate which mechanism is valid to dominate the forming process under the given process parameters. A mathematical model is developed to optimize surface waviness, even forming a smooth surface through establishing a matching relation between heat input (line energy) and materials input (the ratio of wire feed speed to travel speed).
KW - Cross-section profile
KW - Formation mechanism
KW - Matching relation
KW - Surface waviness
KW - Wire and arc additive manufacture
UR - http://www.scopus.com/inward/record.url?scp=85045386057&partnerID=8YFLogxK
U2 - 10.1108/RPJ-04-2016-0064
DO - 10.1108/RPJ-04-2016-0064
M3 - 文章
AN - SCOPUS:85045386057
SN - 1355-2546
VL - 24
SP - 342
EP - 350
JO - Rapid Prototyping Journal
JF - Rapid Prototyping Journal
IS - 2
ER -