Fatigue characteristics of nonferrous bolts at elevated temperature

Shinji Hashimura, Tetsuya Torii, Takefumi Otsu

Research output: Contribution to journalConference articlepeer-review

1 Citation (Scopus)

Abstract

In order to investigate fatigue characteristics of nonferrous bolts at elevated temperature, fatigue tests of bolted joints which were tightened with three kinds of nonferrous bolts were been conducted at 100°C atmosphere. The test bolts were made of A5056 aluminum alloy and AZ31 and AZX912 magnesium alloy. Creep tests of the bolts at 100°C atmosphere were also conducted. The results showed that the fatigue limit of A5056 bolt was the highest of all regardless of the ambient temperature. The fatigue limits of AZ31 bolt and AZX912 bolt also were a half of the fatigue limit of A5056 bolt at both ambient temperature. Bolt clamping force losses due to creep deformation were observed for all bolts during fatigue tests at elevated temperature. Hence as additional tests, the creep tests which was controlled either the tensile force or the displacements respectively were conducted. As the results it was seen that the clamping force losses for all bolts were remarkably large although the each creep deformation was different for each bolt material. Therefore the results indicates that we have to pay attention to the clamping force reduction due to creep deformation if we use the nonferrous bolt in high temperature.

Original languageEnglish
Pages (from-to)265-268
Number of pages4
JournalKey Engineering Materials
Volume627
DOIs
Publication statusPublished - 2015 Jan 1
Event13th International Conference on Fracture and Damage Mechanics, FDM 2014 - Ponta Delgada, Azores, Portugal
Duration: 2014 Sep 232014 Sep 25

Keywords

  • Bolted joint
  • Creep deformation
  • Elevated temperature
  • Fatigue
  • Nonferrous bolt

ASJC Scopus subject areas

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

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