Multi-Dimensional Revealing the Influence Mechanism of the δ Phase on the Tensile Fracture Behavior of a Nickel-Based Superalloy on the Mesoscopic Scale.

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

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Article in Materials (Basel, Switzerland), 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.

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1 citing paper in PubMed.

Advanced Composites Inspired by Biological Structures and Functions in Nature: Architecture Design, Strengthening Mechanisms, and Mechanical-Functional Responses.Advanced science (Weinheim, Baden-Wurttemberg, Germany) · 2023
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6 authors.

Qiang ZhuSchool of Materials Science and Engineering, Harbin Institute of Technology, Weihai 264209, China.

Linfu ZhangSchool of Materials Science and Engineering, Harbin Institute of Technology, Weihai 264209, China.

Chuanjie WangSchool of Materials Science and Engineering, Harbin Institute of Technology, Weihai 264209, China.ORCID 0000-0002-5171-7322

Gang ChenSchool of Materials Science and Engineering, Harbin Institute of Technology, Weihai 264209, China.

Heyong QinCentral Iron & Steel Research Institute, Beijing 100081, China.

Peng ZhangSchool of Materials Science and Engineering, Harbin Institute of Technology, Weihai 264209, China.

Funding

National Natural Science Foundation of China 52175306Natural Science Foundation of Shandong Province ZR2021QE181

6 · The paper itself

Abstract

As the key materials of aircraft engines, nickel-based superalloys have excellent comprehensive properties. Mircotensile experiments were carried out based on in situ digital image correlation (DIC) and in situ synchrotron radiation (SR) technique. The effects of the δ phase on the grain orientation, surface roughening, and strain localization were investigated. The results showed that the average kernel average misorientation (KAM) value of the fractured specimens increased significantly compared with that of the heat-treated specimens. The surface roughness decreased with an increasing volume fraction of the δ phase. The strain localization of specimens increased with the increasing ageing time. The size and volume fraction of voids gradually increased with the increase in plastic strain. Some small voids expanded into large voids with a complex morphology during micro-tensile deformation. The needle-like δ phase near the fracture broke into short rods, while the minor spherical δ phase did not break. The rod-like and needle-like δ phases provided channels for the propagation of the microcrack, and the accumulation of the microcrack eventually led to the fracture of specimens.

Indexed as

fracture mechanismnickel-based superalloystrain evolutionδ phase

Identifiers

PMID35057334

DOI10.3390/ma15020610

PMCPMC8780532

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