skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Hardness and microstructural inhomogeneity at the epitaxial interface of laser 3D-printed Ni-based superalloy

Abstract

Here in this letter, microstructural and mechanical inhomogeneities, a great concern for single crystal Ni-based superalloys repaired by laser assisted 3D printing, have been probed near the epitaxial interface. Nanoindentation tests show the hardness to be uniformly lower in the bulk of the substrate and constantly higher in the epitaxial cladding layer. A gradient of hardness through the heat affected zone is also observed, resulting from an increase in dislocation density, as indicated by the broadening of the synchrotron X-ray Laue microdiffraction reflections. Lastly, the hardening mechanism of the claddin g region, on the other hand, is shown to originate not only from high dislocation density but also and more importantly from the fine γ/γ' microstructure.

Authors:
 [1];  [2];  [1]; ORCiD logo [1]; ORCiD logo [1];  [2]; ORCiD logo [3];  [4];  [1];  [1]
  1. Xi'an Jiaotong Univ., Shaanxi (China). State Key Lab. for Mechanical Behavior of Materials
  2. Xi'an Jiaotong Univ., Shaanxi (China). State Key Lab. for Manufacturing Systems Engineering
  3. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Advanced Light Source (ALS)
  4. Xi'an Jiaotong Univ., Shaanxi (China). State Key Lab. for Manufacturing Systems Engineering
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1377476
Alternate Identifier(s):
OSTI ID: 1323564
Grant/Contract Number:  
AC02-05CH11231; 51671154; 51302207; 51275392; 11132006; 2016YFB0700404; 2015CB057400; 2015gjhz03
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 109; Journal Issue: 10; Journal ID: ISSN 0003-6951
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; Hardness; Cladding; Epitaxy; Dislocations; Nanopowders

Citation Formats

Qian, Dan, Zhang, Anfeng, Zhu, Jianxue, Li, Yao, Zhu, Wenxin, Qi, Baolu, Tamura, Nobumichi, Li, Dichen, Song, Zhongxiao, and Chen, Kai. Hardness and microstructural inhomogeneity at the epitaxial interface of laser 3D-printed Ni-based superalloy. United States: N. p., 2016. Web. doi:10.1063/1.4962485.
Qian, Dan, Zhang, Anfeng, Zhu, Jianxue, Li, Yao, Zhu, Wenxin, Qi, Baolu, Tamura, Nobumichi, Li, Dichen, Song, Zhongxiao, & Chen, Kai. Hardness and microstructural inhomogeneity at the epitaxial interface of laser 3D-printed Ni-based superalloy. United States. https://doi.org/10.1063/1.4962485
Qian, Dan, Zhang, Anfeng, Zhu, Jianxue, Li, Yao, Zhu, Wenxin, Qi, Baolu, Tamura, Nobumichi, Li, Dichen, Song, Zhongxiao, and Chen, Kai. 2016. "Hardness and microstructural inhomogeneity at the epitaxial interface of laser 3D-printed Ni-based superalloy". United States. https://doi.org/10.1063/1.4962485. https://www.osti.gov/servlets/purl/1377476.
@article{osti_1377476,
title = {Hardness and microstructural inhomogeneity at the epitaxial interface of laser 3D-printed Ni-based superalloy},
author = {Qian, Dan and Zhang, Anfeng and Zhu, Jianxue and Li, Yao and Zhu, Wenxin and Qi, Baolu and Tamura, Nobumichi and Li, Dichen and Song, Zhongxiao and Chen, Kai},
abstractNote = {Here in this letter, microstructural and mechanical inhomogeneities, a great concern for single crystal Ni-based superalloys repaired by laser assisted 3D printing, have been probed near the epitaxial interface. Nanoindentation tests show the hardness to be uniformly lower in the bulk of the substrate and constantly higher in the epitaxial cladding layer. A gradient of hardness through the heat affected zone is also observed, resulting from an increase in dislocation density, as indicated by the broadening of the synchrotron X-ray Laue microdiffraction reflections. Lastly, the hardening mechanism of the claddin g region, on the other hand, is shown to originate not only from high dislocation density but also and more importantly from the fine γ/γ' microstructure.},
doi = {10.1063/1.4962485},
url = {https://www.osti.gov/biblio/1377476}, journal = {Applied Physics Letters},
issn = {0003-6951},
number = 10,
volume = 109,
place = {United States},
year = {Fri Sep 09 00:00:00 EDT 2016},
month = {Fri Sep 09 00:00:00 EDT 2016}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Citation Metrics:
Cited by: 12 works
Citation information provided by
Web of Science

Save / Share:

Works referenced in this record:

Single-crystal laser deposition of superalloys: processing–microstructure maps
journal, April 2001


Evolution of microstructures at a wide range of solidification cooling rate in a Ni-based superalloy
journal, September 2013


A look-up table based approach to characterize crystal twinning for synchrotron X-ray Laue microdiffraction scans
journal, April 2015


A synchrotron study of defect and strain inhomogeneity in laser-assisted three-dimensionally-printed Ni-based superalloy
journal, November 2015


A dedicated superbend x-ray microdiffraction beamline for materials, geo-, and environmental sciences at the advanced light source
journal, March 2009


The correlation of the indentation size effect measured with indenters of various shapes
journal, April 2002


Quantitative microdiffraction from deformed crystals with unpaired dislocations and dislocation walls
journal, February 2003


Correlation between nanoindentation and tensile propertiesInfluence of the indentation size effect
journal, November 2003


General relationship between strength and hardness
journal, November 2011


Regulating the coarsening of the γ′ phase in superalloys
journal, August 2015


Residual stress preserved in quartz from the San Andreas Fault Observatory at Depth
journal, February 2015


A synchrotron study of microstructure gradient in laser additively formed epitaxial Ni-based superalloy
journal, October 2015


Repair and manufacturing of single crystal Ni-based superalloys components by laser powder deposition—A review
journal, February 2015


An improved technique for determining hardness and elastic modulus using load and displacement sensing indentation experiments
journal, June 1992


Investigation on multi-track multi-layer epitaxial growth of columnar crystal in direct laser forming
journal, February 2013


Indentation size effects in crystalline materials: A law for strain gradient plasticity
journal, March 1998


High precision thermal stress study on flip chips by synchrotron polychromatic x-ray microdiffraction
journal, March 2010


Works referencing / citing this record:

Transition from Crystal to Metallic Glass and Micromechanical Property Change of Fe-B-Si Alloy During Rapid Solidification
journal, December 2019


Recent advances of two-way shape memory polymers and four-dimensional printing under stress-free conditions
journal, January 2020