TY - JOUR
T1 - Graded structures by multi-material mixing in laser powder bed fusion
AU - Wits, Wessel W.
AU - Amsterdam, Emiel
N1 - Funding Information:
The Netherlands Aerospace Centre (NLR) is kindly recognized for hosting Dr. Wits in the Aerospace Vehicle Structures Technology group for his multi-material AM research sabbatical.
Publisher Copyright:
© 2021 CIRP
PY - 2021/4/12
Y1 - 2021/4/12
N2 - Multi-material mixing in laser powder bed fusion is demonstrated by fabricating functionally graded structures in which Inconel and stainless steel are metallurgically bonded. Material mixing and elemental diffusion in the transition zone are studied for single scan tracks, hatch scans and multi-layer builds. An adapted recoater enabling powder deposition from multiple sources was utilized to fabricate a more gradual transition zone by alternating material deposition within the build. Homogenization heat treatment enhances elemental diffusion compared to the as-built configuration resulting in a gradual material transition without a distinct interface. Finally, a multi-material heat exchanger is presented as exemplary design implementation.
AB - Multi-material mixing in laser powder bed fusion is demonstrated by fabricating functionally graded structures in which Inconel and stainless steel are metallurgically bonded. Material mixing and elemental diffusion in the transition zone are studied for single scan tracks, hatch scans and multi-layer builds. An adapted recoater enabling powder deposition from multiple sources was utilized to fabricate a more gradual transition zone by alternating material deposition within the build. Homogenization heat treatment enhances elemental diffusion compared to the as-built configuration resulting in a gradual material transition without a distinct interface. Finally, a multi-material heat exchanger is presented as exemplary design implementation.
KW - Additive manufacturing
KW - Material mixing
KW - Selective Laser Melting (SLM)
UR - http://www.scopus.com/inward/record.url?scp=85104087473&partnerID=8YFLogxK
U2 - 10.1016/j.cirp.2021.03.005
DO - 10.1016/j.cirp.2021.03.005
M3 - Article
AN - SCOPUS:85104087473
VL - 70
SP - 159
EP - 162
JO - CIRP annals : manufacturing technology
JF - CIRP annals : manufacturing technology
SN - 0007-8506
IS - 1
ER -