A synchrotron study of microstructure gradient in laser additively formed epitaxial Ni-based superalloy

Xue, Jiawei; Zhang, Anfeng; Li, Yao; Qian, Dan; Wan, Jingchun; Qi, Baolu; Tamura, Nobumichi; Song, Zhongxiao; Chen, Kai

doi:10.1038/srep14903

Title: A synchrotron study of microstructure gradient in laser additively formed epitaxial Ni-based superalloy

Journal Article · Thu Oct 08 00:00:00 EDT 2015 · Scientific Reports

DOI:https://doi.org/10.1038/srep14903· OSTI ID:1256058

Xue, Jiawei ^[1]; Zhang, Anfeng ^[1]; Li, Yao ^[1]; Qian, Dan ^[1]; Wan, Jingchun ^[1]; Qi, Baolu ^[1]; Tamura, Nobumichi ^[2]; Song, Zhongxiao ^[1]; Chen, Kai ^[1]

Xi'an Jiaotong Univ., Xi'an, Shaanxi (China)
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS)

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.

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Research Organization:: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: AC02-05CH11231

OSTI ID:: 1256058

Alternate ID(s):: OSTI ID: 1378587

Journal Information:: Scientific Reports, Vol. 5; ISSN 2045-2322

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 18 works

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Cited By (6)

In situ synchrotron study of electromigration induced grain rotations in Sn solder joints Shen, Hao; Zhu, Wenxin; Li, Yao Scientific Reports, Vol. 6, Issue 1 https://doi.org/10.1038/srep24418	journal	April 2016
Real-time microstructure imaging by Laue microdiffraction: A sample application in laser 3D printed Ni-based superalloys Zhou, Guangni; Zhu, Wenxin; Shen, Hao Scientific Reports, Vol. 6, Issue 1 https://doi.org/10.1038/srep28144	journal	June 2016
Quantitative microstructural imaging by scanning Laue x-ray micro- and nanodiffraction Chen, Xian; Dejoie, Catherine; Jiang, Tengfei MRS Bulletin, Vol. 41, Issue 6 https://doi.org/10.1557/mrs.2016.97	journal	June 2016
Statistical study of ductility-dip cracking induced plastic deformation in polycrystalline laser 3D printed Ni-based superalloy Qian, Dan; Xue, Jiawei; Zhang, Anfeng Scientific Reports, Vol. 7, Issue 1 https://doi.org/10.1038/s41598-017-03051-x	journal	June 2017
Dislocation network with pair-coupling structure in {111} γ/γ′ interface of Ni-based single crystal superalloy Ru, Yi; Li, Shusuo; Zhou, Jian Scientific Reports, Vol. 6, Issue 1 https://doi.org/10.1038/srep29941	journal	August 2016
Analysis and constitutive modelling of high strain rate deformation behaviour of wire–arc additive-manufactured ATI 718Plus superalloy Asala, G.; Andersson, J.; Ojo, O. A. The International Journal of Advanced Manufacturing Technology, Vol. 103, Issue 1-4 https://doi.org/10.1007/s00170-019-03616-2	journal	April 2019

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