A synchrotron study of microstructure gradient in laser additively formed epitaxial Ni-based superalloy
Abstract
Laser additive forming is considered to be one of the promising techniques to repair single crystal Ni-based superalloy parts to extend their life and reduce the cost. Preservation of the single crystalline nature and prevention of thermal mechanical failure are two of the most essential issues for the application of this technique. Here we employ synchrotron X-ray microdiffraction to evaluate the quality in terms of crystal orientation and defect distribution of a Ni-based superalloy DZ125L directly formed by a laser additive process rooted from a single crystalline substrate of the same material. We show that a disorientation gradient caused by a high density of geometrically necessary dislocations and resultant subgrains exists in the interfacial region between the epitaxial and stray grains. This creates a potential relationship of stray grain formation and defect accumulation. The observation offers new directions on the study of performance control and reliability of the laser additive manufactured superalloys.
- Authors:
-
- Xi'an Jiaotong Univ., Xi'an, Shaanxi (China)
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS)
- Publication Date:
- Research Org.:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- OSTI Identifier:
- 1256058
- Alternate Identifier(s):
- OSTI ID: 1378587
- Grant/Contract Number:
- AC02-05CH11231
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Scientific Reports
- Additional Journal Information:
- Journal Volume: 5; Journal ID: ISSN 2045-2322
- Publisher:
- Nature Publishing Group
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE
Citation Formats
Xue, Jiawei, Zhang, Anfeng, Li, Yao, Qian, Dan, Wan, Jingchun, Qi, Baolu, Tamura, Nobumichi, Song, Zhongxiao, and Chen, Kai. A synchrotron study of microstructure gradient in laser additively formed epitaxial Ni-based superalloy. United States: N. p., 2015.
Web. doi:10.1038/srep14903.
Xue, Jiawei, Zhang, Anfeng, Li, Yao, Qian, Dan, Wan, Jingchun, Qi, Baolu, Tamura, Nobumichi, Song, Zhongxiao, & Chen, Kai. A synchrotron study of microstructure gradient in laser additively formed epitaxial Ni-based superalloy. United States. https://doi.org/10.1038/srep14903
Xue, Jiawei, Zhang, Anfeng, Li, Yao, Qian, Dan, Wan, Jingchun, Qi, Baolu, Tamura, Nobumichi, Song, Zhongxiao, and Chen, Kai. Thu .
"A synchrotron study of microstructure gradient in laser additively formed epitaxial Ni-based superalloy". United States. https://doi.org/10.1038/srep14903. https://www.osti.gov/servlets/purl/1256058.
@article{osti_1256058,
title = {A synchrotron study of microstructure gradient in laser additively formed epitaxial Ni-based superalloy},
author = {Xue, Jiawei and Zhang, Anfeng and Li, Yao and Qian, Dan and Wan, Jingchun and Qi, Baolu and Tamura, Nobumichi and Song, Zhongxiao and Chen, Kai},
abstractNote = {Laser additive forming is considered to be one of the promising techniques to repair single crystal Ni-based superalloy parts to extend their life and reduce the cost. Preservation of the single crystalline nature and prevention of thermal mechanical failure are two of the most essential issues for the application of this technique. Here we employ synchrotron X-ray microdiffraction to evaluate the quality in terms of crystal orientation and defect distribution of a Ni-based superalloy DZ125L directly formed by a laser additive process rooted from a single crystalline substrate of the same material. We show that a disorientation gradient caused by a high density of geometrically necessary dislocations and resultant subgrains exists in the interfacial region between the epitaxial and stray grains. This creates a potential relationship of stray grain formation and defect accumulation. The observation offers new directions on the study of performance control and reliability of the laser additive manufactured superalloys.},
doi = {10.1038/srep14903},
journal = {Scientific Reports},
number = ,
volume = 5,
place = {United States},
year = {Thu Oct 08 00:00:00 EDT 2015},
month = {Thu Oct 08 00:00:00 EDT 2015}
}
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Works referencing / citing this record:
In situ synchrotron study of electromigration induced grain rotations in Sn solder joints
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- Scientific Reports, Vol. 6, Issue 1
Real-time microstructure imaging by Laue microdiffraction: A sample application in laser 3D printed Ni-based superalloys
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Statistical study of ductility-dip cracking induced plastic deformation in polycrystalline laser 3D printed Ni-based superalloy
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Dislocation network with pair-coupling structure in {111} γ/γ′ interface of Ni-based single crystal superalloy
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Analysis and constitutive modelling of high strain rate deformation behaviour of wire–arc additive-manufactured ATI 718Plus superalloy
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