Effect of Grain Size on Ultrasonic Fatigue Properties of Ni-Base Super Alloy Inconel 718

• KAWAGOISHI Norio

  Department of Mechanical Engineering Kagoshima University

• MAEMURA Eiji

  鹿児島大学大学院理工学研究科

• CHEN Qiang

  高知高専

• GOTO Masahiro

  大分大学工学部

• MORINO Kazuhiro

  徳山高専

Bibliographic Information

Other Title

• Ｎｉ基超合金インコネル７１８の超音波疲労特性に及ぼす結晶粒径の影響
• Niキ チョウゴウキン インコネル 718 ノ チョウオンパ ヒロウ トクセイ ニ オヨボス ケッショウ リュウケイ ノ エイキョウ

Abstract

Ultrasonic fatigue tests of plain specimens with different grain sizes were carried out for Ni-base super alloy, Inconel 718, in ambient air in order to investigate the effect of grain size on fatigue properties. Fatigue strength was increased with decrease in grain size. The increase in fatigue strength by refining grain size was mainly caused by the suppression of crack initiation. That is, the effect of grain size on crack growth rate was hardly recognized, though crack morphology was rougher in the specimen of larger grain, meaning that the crack growth in the large-grained specimens was suppressed by roughness induced crack closure. On the other hand, however, more flat facets caused by twin boundary cracking were observed in the large-grained specimens, which inversely led to crack growth acceleration.

Journal

• TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series A

  TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series A 74 (743), 1000-1005, 2008

  The Japan Society of Mechanical Engineers

Keywords

• Fatigue
• Inconel 718
• Ultrasonic Fatigue
• Grain Size
• Crack Initiation
• Crack Propagation
• Fracture Mechanism

Details

• CRID: 1390001204478720128
• NII Article ID: 110006836792
• NII Book ID: AN0018742X
• DOI: 10.1299/kikaia.74.1000
• COI: 1:CAS:528:DC%2BD1cXhtFOjtr3F
• ISSN: 18848338
• ISSN: 03875008
• HANDLE: 10559/13886
• NDL BIB ID: 9592731
• Web Site: https://our.repo.nii.ac.jp/records/2008237
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I9592731
• Web Site: http://www.jstage.jst.go.jp/article/kikaia1979/74/743/74_743_1000/_pdf
• Text Lang: ja
• Data Source:
  • JaLC
  • IRDB
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed