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Effect of microstructure on low cycle fatigue behavior of Inconel 706 at 650 o C
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  • Sangshik Kim,
  • Kwangyeon Kim,
  • Junmin Lee,
  • Jung Gi Kim
Sangshik Kim
Gyeongsang National University College of Engineering

Corresponding Author:sang@gnu.ac.kr

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Kwangyeon Kim
Gyeongsang National University College of Engineering
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Junmin Lee
Gyeongsang National University College of Engineering
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Jung Gi Kim
Gyeongsang National University College of Engineering
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Abstract

Four different types of specimens were prepared from the center and the periphery of two large IN706 forged discs of commercial scale, and low cycle fatigue (LCF) tests were conducted at 650 oC. The IN706 specimens with lower LCF lives showed relatively large fraction of cleavage-like fracture along linearly aligned η (Ni 3Ti) precipitates in the area of crack propagation. The amount of η precipitates for those specimens with greater LCF lives was negligible, and the fracture mode of crack propagation was dominantly intergranular. Crack initiation was mainly by persistent slip band (PSB) cracking at the surface, and no notable difference was found for each specimen. The correlation between tensile properties, grain size and LCF lives of IN706 at 650 oC appeared to be not as significant as expected.
11 Jul 2023Submitted to Fatigue & Fracture of Engineering Materials & Structures
11 Jul 2023Submission Checks Completed
11 Jul 2023Assigned to Editor
17 Jul 2023Reviewer(s) Assigned
17 Aug 2023Review(s) Completed, Editorial Evaluation Pending
18 Aug 2023Editorial Decision: Revise Major
06 Sep 20231st Revision Received
06 Sep 2023Submission Checks Completed
06 Sep 2023Assigned to Editor
10 Sep 2023Reviewer(s) Assigned
25 Sep 2023Review(s) Completed, Editorial Evaluation Pending
02 Oct 2023Editorial Decision: Accept