Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Theoretical analysis of the coincident wire-powder laser deposition process
AU - Pinkerton, Andrew J.
AU - Syed, Waheed Ul Haq
AU - Li, Lin
PY - 2007/12
Y1 - 2007/12
N2 - The process of coincident wire and powder deposition by laser has recently emerged in research work as a, layered manufacturing method with a higher deposition rate than the established laser direct metal deposition technique and as a means of creating functionally graded metallic surface layers in a single pass. This work analytically models the process by accounting for the incoming wire and powder as virtual negative heat sources. The major assumptions of the model are confirmed experimentally and the predicted temperature profiles compared with values measured using contact and pyrometric methods. Model accuracy outside the molten zone is excellent, but this solution does not account for latent heat and intrapool circulation effects so it gives only moderate precision when extrapolated to within the melt pool. Increasing the mass feed rate to the melt pool reduces its depth and the temperature surrounding it-these effects can be quantified in three dimensions by the model.
AB - The process of coincident wire and powder deposition by laser has recently emerged in research work as a, layered manufacturing method with a higher deposition rate than the established laser direct metal deposition technique and as a means of creating functionally graded metallic surface layers in a single pass. This work analytically models the process by accounting for the incoming wire and powder as virtual negative heat sources. The major assumptions of the model are confirmed experimentally and the predicted temperature profiles compared with values measured using contact and pyrometric methods. Model accuracy outside the molten zone is excellent, but this solution does not account for latent heat and intrapool circulation effects so it gives only moderate precision when extrapolated to within the melt pool. Increasing the mass feed rate to the melt pool reduces its depth and the temperature surrounding it-these effects can be quantified in three dimensions by the model.
KW - laser deposition
KW - layered manufacturing
KW - functionally graded materials
KW - powders
KW - wires
KW - powder technology
U2 - 10.1115/1.2752828
DO - 10.1115/1.2752828
M3 - Journal article
VL - 129
SP - 1019
EP - 1027
JO - Journal of Manufacturing Science and Engineering
JF - Journal of Manufacturing Science and Engineering
SN - 1087-1357
IS - 6
ER -