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Analysis of Favorable Process Conditions for the Manufacturing of Thin-Wall Pieces of Mild Steel Obtained by Wire and Arc Additive Manufacturing (WAAM)

Journal Article · · Materials
DOI:https://doi.org/10.3390/ma11081449· OSTI ID:1472065
 [1];  [1];  [2];  [3];  [3];  [4];  [4]
  1. Univ. Nacional de Educacion a Distancia (UNED), Madrid (Spain)
  2. Univ. of Vigo, Vigo (Spain)
  3. Univ. Nacional de Educacion a Distancia (UNED), Madrid (Spain); Argonne National Lab. (ANL), Lemont, IL (United States)
  4. Argonne National Lab. (ANL), Lemont, IL (United States)

Here, one of the challenges in additive manufacturing (AM) of metallic materials is to obtain workpieces free of defects with excellent physical, mechanical, and metallurgical properties. In wire and arc additive manufacturing (WAAM) the influences of process conditions on thermal history, microstructure and resultant mechanical and surface properties of parts must be analyzed. In this work, 3D metallic parts of mild steel wire (American Welding Society-AWS ER70S-6) are built with a WAAM process by depositing layers of material on a substrate of a S235 JR steel sheet of 3 mm thickness under different process conditions, using as welding process the gas metal arc welding (GMAW) with cold metal transfer (CMT) technology, combined with a positioning system such as a computer numerical controlled (CNC) milling machine. Considering the hardness profiles, the estimated ultimate tensile strengths (UTS) derived from the hardness measurements and the microstructure findings, it can be concluded that the most favorable process conditions are the ones provided by CMT, with homogeneous hardness profiles, good mechanical strengths in accordance to conditions defined by standard, and without formation of a decohesionated external layer; CMT Continuous is the optimal option as the mechanical properties are better than single CMT.

Research Organization:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1472065
Journal Information:
Materials, Journal Name: Materials Journal Issue: 8 Vol. 11; ISSN 1996-1944; ISSN MATEG9
Publisher:
MDPICopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (3)

Special Issue of the Manufacturing Engineering Society (MES) journal October 2018
Microstructural evolution and mechanical properties of a low-carbon low-alloy steel produced by wire arc additive manufacturing journal October 2019
Comparative study of 316L depositions by two welding current processes journal July 2019

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