Effect of defects on the fatigue limit of Ni-based superalloy 718 with different grain sizes

Kevinsanny, Saburo Okazaki, Osamu Takakuwa, Yuhei Ogawa, Koichi Okita, Yusuke Funakoshi, Junichiro Yamabe, Saburo Matsuoka, Hisao Matsunaga

研究成果: ジャーナルへの寄稿記事

1 引用 (Scopus)

抄録

Tension-compression fatigue tests were performed on two types of Ni-based superalloy 718 with different microstructures in which small artificial defects of various sizes and shapes were introduced. The susceptibility of the fatigue strength to the defects varied significantly with the microstructure morphology, ie, a smaller grain size made the alloy more susceptible to defects. The fatigue limit as a small-crack threshold was successfully predicted using the √area parameter model. The evaluation of the fatigue limit was classified into the following three stages depending on the defect size: (a) harmless defect regime, (b) small-crack regime, and (c) large-crack regime. Such a classification enabled comprehensive evaluation of the fatigue limit in a wide range of defect size, considering (a) defect size over a range of small crack to large crack and (b) characteristics of matrix represented by grain size and hardness.

元の言語英語
ページ(範囲)1203-1213
ページ数11
ジャーナルFatigue and Fracture of Engineering Materials and Structures
42
発行部数5
DOI
出版物ステータス出版済み - 5 1 2019

Fingerprint

Superalloys
Fatigue of materials
Defects
Cracks
Microstructure
Compaction
Hardness

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

これを引用

Effect of defects on the fatigue limit of Ni-based superalloy 718 with different grain sizes. / Kevinsanny; Okazaki, Saburo; Takakuwa, Osamu; Ogawa, Yuhei; Okita, Koichi; Funakoshi, Yusuke; Yamabe, Junichiro; Matsuoka, Saburo; Matsunaga, Hisao.

:: Fatigue and Fracture of Engineering Materials and Structures, 巻 42, 番号 5, 01.05.2019, p. 1203-1213.

研究成果: ジャーナルへの寄稿記事

Kevinsanny ; Okazaki, Saburo ; Takakuwa, Osamu ; Ogawa, Yuhei ; Okita, Koichi ; Funakoshi, Yusuke ; Yamabe, Junichiro ; Matsuoka, Saburo ; Matsunaga, Hisao. / Effect of defects on the fatigue limit of Ni-based superalloy 718 with different grain sizes. :: Fatigue and Fracture of Engineering Materials and Structures. 2019 ; 巻 42, 番号 5. pp. 1203-1213.
@article{b58f81a186334bdd9072f39864cd0be8,
title = "Effect of defects on the fatigue limit of Ni-based superalloy 718 with different grain sizes",
abstract = "Tension-compression fatigue tests were performed on two types of Ni-based superalloy 718 with different microstructures in which small artificial defects of various sizes and shapes were introduced. The susceptibility of the fatigue strength to the defects varied significantly with the microstructure morphology, ie, a smaller grain size made the alloy more susceptible to defects. The fatigue limit as a small-crack threshold was successfully predicted using the √area parameter model. The evaluation of the fatigue limit was classified into the following three stages depending on the defect size: (a) harmless defect regime, (b) small-crack regime, and (c) large-crack regime. Such a classification enabled comprehensive evaluation of the fatigue limit in a wide range of defect size, considering (a) defect size over a range of small crack to large crack and (b) characteristics of matrix represented by grain size and hardness.",
author = "Kevinsanny and Saburo Okazaki and Osamu Takakuwa and Yuhei Ogawa and Koichi Okita and Yusuke Funakoshi and Junichiro Yamabe and Saburo Matsuoka and Hisao Matsunaga",
year = "2019",
month = "5",
day = "1",
doi = "10.1111/ffe.12989",
language = "English",
volume = "42",
pages = "1203--1213",
journal = "Fatigue and Fracture of Engineering Materials and Structures",
issn = "8756-758X",
publisher = "Wiley-Blackwell",
number = "5",

}

TY - JOUR

T1 - Effect of defects on the fatigue limit of Ni-based superalloy 718 with different grain sizes

AU - Kevinsanny,

AU - Okazaki, Saburo

AU - Takakuwa, Osamu

AU - Ogawa, Yuhei

AU - Okita, Koichi

AU - Funakoshi, Yusuke

AU - Yamabe, Junichiro

AU - Matsuoka, Saburo

AU - Matsunaga, Hisao

PY - 2019/5/1

Y1 - 2019/5/1

N2 - Tension-compression fatigue tests were performed on two types of Ni-based superalloy 718 with different microstructures in which small artificial defects of various sizes and shapes were introduced. The susceptibility of the fatigue strength to the defects varied significantly with the microstructure morphology, ie, a smaller grain size made the alloy more susceptible to defects. The fatigue limit as a small-crack threshold was successfully predicted using the √area parameter model. The evaluation of the fatigue limit was classified into the following three stages depending on the defect size: (a) harmless defect regime, (b) small-crack regime, and (c) large-crack regime. Such a classification enabled comprehensive evaluation of the fatigue limit in a wide range of defect size, considering (a) defect size over a range of small crack to large crack and (b) characteristics of matrix represented by grain size and hardness.

AB - Tension-compression fatigue tests were performed on two types of Ni-based superalloy 718 with different microstructures in which small artificial defects of various sizes and shapes were introduced. The susceptibility of the fatigue strength to the defects varied significantly with the microstructure morphology, ie, a smaller grain size made the alloy more susceptible to defects. The fatigue limit as a small-crack threshold was successfully predicted using the √area parameter model. The evaluation of the fatigue limit was classified into the following three stages depending on the defect size: (a) harmless defect regime, (b) small-crack regime, and (c) large-crack regime. Such a classification enabled comprehensive evaluation of the fatigue limit in a wide range of defect size, considering (a) defect size over a range of small crack to large crack and (b) characteristics of matrix represented by grain size and hardness.

UR - http://www.scopus.com/inward/record.url?scp=85062367583&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85062367583&partnerID=8YFLogxK

U2 - 10.1111/ffe.12989

DO - 10.1111/ffe.12989

M3 - Article

AN - SCOPUS:85062367583

VL - 42

SP - 1203

EP - 1213

JO - Fatigue and Fracture of Engineering Materials and Structures

JF - Fatigue and Fracture of Engineering Materials and Structures

SN - 8756-758X

IS - 5

ER -