TY - JOUR
T1 - Overhang structure and accuracy in laser engineered net shaping of Fe-Cr steel
AU - Wang, Xinlin
AU - Deng, Dewei
AU - Hu, Yingbin
AU - Ning, Fuda
AU - Wang, Hui
AU - Cong, Weilong
AU - Zhang, Hongchao
N1 - Funding Information:
This work was conducted in Department of Industrial, Manufacturing, and Systems engineering at Texas Tech University. It was also carried out with the financial support of the China Scholarship Council, National Key Basic Research and Development Program (No. 2011CB013402 ), Liaoning Natural Science Foundation (No. 2014028002 ), Liaoning Science and Technology Innovation Project (No. 201303002 ), SBW-DUT Key Research and Development Program, the Fundamental Research Funds for the Central Universities .
Publisher Copyright:
© 2018 Elsevier Ltd
PY - 2018/10
Y1 - 2018/10
N2 - Laser engineered net shaping (LENS), developed from laser cladding and rapid prototyping, has different promising applications such as aerospace, automotive, marine, tool manufacturing, etc. Due to the features of LENS process, the capability of overhang structure deposition was limited and some geometrical structures cannot be perfectly built. Investigating overhang building mechanisms and angle accuracy are crucial. In this study, the effects of scanning patterns (reciprocating and unidirectional deposition way) and vertical increment (z-increment) on overhang structures in LENS have been investigated. It was found that the overhang deposited in a reciprocating way exhibited higher geometry accuracy than that deposited in a unidirectional way. By optimizing z-increment, the discrepancy between the designed and experimental inclined angles of overhangs greatly decreased. The effects of processing parameters, including laser power, scanning speed, and powder feed rate, on the optimal z-increment were also investigated.
AB - Laser engineered net shaping (LENS), developed from laser cladding and rapid prototyping, has different promising applications such as aerospace, automotive, marine, tool manufacturing, etc. Due to the features of LENS process, the capability of overhang structure deposition was limited and some geometrical structures cannot be perfectly built. Investigating overhang building mechanisms and angle accuracy are crucial. In this study, the effects of scanning patterns (reciprocating and unidirectional deposition way) and vertical increment (z-increment) on overhang structures in LENS have been investigated. It was found that the overhang deposited in a reciprocating way exhibited higher geometry accuracy than that deposited in a unidirectional way. By optimizing z-increment, the discrepancy between the designed and experimental inclined angles of overhangs greatly decreased. The effects of processing parameters, including laser power, scanning speed, and powder feed rate, on the optimal z-increment were also investigated.
KW - Angle accuracy
KW - Geometry accuracy
KW - Laser engineered net shaping
KW - Overhang structure
KW - Scanning pattern
KW - Z-increment
UR - http://www.scopus.com/inward/record.url?scp=85046686976&partnerID=8YFLogxK
U2 - 10.1016/j.optlastec.2018.04.015
DO - 10.1016/j.optlastec.2018.04.015
M3 - Article
AN - SCOPUS:85046686976
VL - 106
SP - 357
EP - 365
JO - Optics and Laser Technology
JF - Optics and Laser Technology
SN - 0030-3992
ER -