Ozan Can Ozaner (Author), Damjan Klobčar (Author), Abhay Sharma (Author)

Abstract

Wire and arc additive manufacturing (WAAM) technology has recently become attractive due to the fact of its high production capacity and flexible deposition strategy. One of the most prominent drawbacks of WAAM is surface irregularity. Therefore, WAAMed parts cannot be used as built; they require secondary machining operations. However, performing such operations is challenging due to the fact of high waviness. Selecting an appropriate cutting strategy is also challenging, because surface irregularity makes cutting forces unstable. The present research determines the most suitable machining strategy by assessing the specific cutting energy and local machined volume. Up- and down-milling are evaluated by calculating the removed volume and specific cutting energy for creep-resistant steel, stainless steel, and their combination. It is shown that the main factors that affect the machinability of WAAMed parts are the machined volume and specific cutting energy rather than the axial and radial depths of the cut due to the fact of high surface irregularity. Even though the results were unstable, a surface roughness of 0.1 µm was obtained with up-milling. Despite a two-fold difference in the hardness between the two materials in the multi-material deposition, it is found that hardness should not be used as a criterion for as-built surface processing. In addition, the results show no machinability difference between multi- and single-material components for a low machined volume and low surface irregularity.

Keywords

bimetali;specifična rezalna energija;mehanska obdelava;oblikovno obločno navarjanje;aditivne tehnologije;integriteta površin;bimetallic;specific cutting energy;machinability;WAAM;additive manufacturing;surface integrity;

Data

Language: English
Year of publishing:
Typology: 1.01 - Original Scientific Article
Organization: UL FS - Faculty of Mechanical Engineering
UDC: 621.7+621.9
COBISS: 143970819 Link will open in a new window
ISSN: 1996-1944
Views: 10
Downloads: 0
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Other data

Secondary language: Slovenian
Secondary keywords: bimetali;specifična rezalna energija;mehanska obdelava;oblikovno obločno navarjanje;aditivne tehnologije;integriteta površin;
Type (COBISS): Article
Pages: str. 1-20
Volume: ǂVol. ǂ16
Issue: ǂiss. ǂ5
Chronology: Mar. 2023
DOI: 10.3390/ma16052055
ID: 18149664
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