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Zhu Q, Chen G, Wang C, et al. Tensile Deformation and Fracture Behaviors of a Nickel-Based Superalloy via In Situ Digital Image Correlation and Synchrotron Radiation X-ray Tomography. Materials (Basel). 2019;12(15)doi: 10.3390/ma12152461.
Zhu, Q., Chen, G., Wang, C., Qin, H., & Zhang, P. (2019). Tensile Deformation and Fracture Behaviors of a Nickel-Based Superalloy via In Situ Digital Image Correlation and Synchrotron Radiation X-ray Tomography. Materials (Basel, Switzerland), 12(15), . https://doi.org/10.3390/ma12152461
Zhu, Qiang, et al. "Tensile Deformation and Fracture Behaviors of a Nickel-Based Superalloy via In Situ Digital Image Correlation and Synchrotron Radiation X-ray Tomography." Materials (Basel, Switzerland) vol. 12,15 (2019). doi: https://doi.org/10.3390/ma12152461
Zhu Q, Chen G, Wang C, Qin H, Zhang P. Tensile Deformation and Fracture Behaviors of a Nickel-Based Superalloy via In Situ Digital Image Correlation and Synchrotron Radiation X-ray Tomography. Materials (Basel). 2019 Aug 02;12(15). doi: 10.3390/ma12152461. PMID: 31382406; PMCID: PMC6696471.
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Materials (Basel). 2019 Aug 02;12(15). doi: 10.3390/ma12152461.

Tensile Deformation and Fracture Behaviors of a Nickel-Based Superalloy via In Situ Digital Image Correlation and Synchrotron Radiation X-ray Tomography.

Materials (Basel, Switzerland)

Qiang Zhu, Gang Chen, Chuanjie Wang, Heyong Qin, Peng Zhang

Affiliations

  1. Key Laboratory of Micro-systems and Micro-structures Manufacturing of Ministry of Education, Harbin Institute of Technology, Harbin 150080, China.
  2. School of Materials Science and Engineering, Harbin Institute of Technology at Weihai, Weihai 264209, China.
  3. Central Iron & Steel Research Institute, Beijing 100081, China.
  4. Key Laboratory of Micro-systems and Micro-structures Manufacturing of Ministry of Education, Harbin Institute of Technology, Harbin 150080, China. [email protected].
  5. School of Materials Science and Engineering, Harbin Institute of Technology at Weihai, Weihai 264209, China. [email protected].

PMID: 31382406 PMCID: PMC6696471 DOI: 10.3390/ma12152461

Abstract

Nickel-based superalloys have become key materials for turbine disks and other aerospace components due to their excellent mechanical properties at high temperatures. Mechanical properties of nickel-based superalloys are closely related to their microstructures. Various heat treatment processes were conducted to obtain the desired microstructures of a nickel-based superalloy in this study. The effect of the initial microstructures on the tensile deformation and fracture behaviors was investigated via in situ digital image correlation (DIC) and synchrotron radiation X-ray tomography (SRXT). The results showed that the size and volume fraction of γ″ and γ' phases increased with the aging time. The yield strength and the ultimate tensile strength increased due to the precipitation strengthening at the expense of ductility. The surface strain analysis showed severely inhomogeneous deformation. The local strains at the edge of specimens were corresponded to higher void densities. The fracture of carbides occurred owing to the stress concentration, which was caused by the dislocation accumulation. The fracture mode was dimple coalescence ductile fracture.

Keywords: digital image correlation; fracture mechanism; strain evolution; superalloy; synchrotron radiation; void defect

References

  1. Science. 2011 Mar 25;331(6024):1587-90 - PubMed
  2. Materials (Basel). 2018 Aug 24;11(9):null - PubMed
  3. Materials (Basel). 2019 Jan 11;12(2):null - PubMed

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