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Title: A synchrotron study of defect and strain inhomogeneity in laser-assisted three-dimensionally-printed Ni-based superalloy

Journal Article · · Applied Physics Letters
DOI:https://doi.org/10.1063/1.4934839· OSTI ID:1378629
ORCiD logo [1];  [2];  [2];  [2];  [3]; ORCiD logo [4];  [2];  [1]
  1. Xi'an Jiaotong Univ., Shaanxi (China). Center for Advancing Materials Performance from the Nanoscale (CAMP-Nano), State Key Lab. for Mechanical Behavior of Materials
  2. Xi'an Jiaotong Univ., Shaanxi (China). State Key Lab. for Mechanical Behavior of Materials
  3. Xi'an Jiaotong Univ., Shaanxi (China). State Key Lab. for Manufacturing Systems Engineering
  4. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS)
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Synchrotron X-ray microdiffraction was employed to investigate the inhomogeneous distribution of defect and residual strain in the transitional region between the dendritic and stray grains in a laser-assisted 3D printed Ni-based superalloy. The dendritic region was found to be under tensile strain transversely to the primary dendrite arm directions. The dendrite edges, where high level of strains and geometrically necessary dislocations were detected, were discerned as low angle grain boundaries. Lastly, high angle grain boundaries were observed in the stray grain region, and the orientation of the strain tensor in this region varied dramatically at the micron scale, in contrast with the more or less homogeneous distribution in the dendritic region.

Research Organization:
Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); National Natural Science Foundation of China (NSFC)
Grant/Contract Number:
AC02-05CH11231; 51302207; 51275392; 51271140; 2015CB057400; 2015gjhz03
OSTI ID:
1378629
Journal Information:
Applied Physics Letters, Vol. 107, Issue 18; ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 10 works
Citation information provided by
Web of Science

References (19)

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Cited By (5)

Quantitative microstructural imaging by scanning Laue x-ray micro- and nanodiffraction journal June 2016
Statistical study of ductility-dip cracking induced plastic deformation in polycrystalline laser 3D printed Ni-based superalloy journal June 2017
Unprecedented sensing of interlayer defects in three-dimensionally printed polymer by capacitance measurement journal October 2018
Microstructure and Properties of 3D Printed Inconel 718 Joint Brazed with BNi-2 Amorphous Filler Metal journal November 2018
A phase-field-crystal alloy model for late-stage solidification studies involving the interaction of solid, liquid and gas phases
  • Wang, Nan; Kocher, Gabriel; Provatas, Nikolas
  • Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, Vol. 376, Issue 2113 https://doi.org/10.1098/rsta.2017.0212
journal January 2018

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Related Subjects

36 MATERIALS SCIENCE
Solidification
3D printing
Grain boundaries
Crystal orientation
Three dimensional image processing
inhomogeneous defects and strains
Ni-based superalloy
synchrotron X-ray microdiffraction
laser assisted 3D printing