Prediction of grain size and mechanical properties in friction stir welded pure copper joints using a thermal model

A. Heidarzadeh, Mirmasoud Jabbaribehnam, M. Esmaily

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

In this study, a thermal model was developed and applied to simulate the friction stir welding of pure copper plates with the thickness of 2 mm. The different traverse speeds of 100, 200, 300, and 400 mm min−1 and rotational speeds of 400, 700, 900 rev min−1 were considered as welding parameters. Microstructural characterization, hardness measurement, tensile test, and fractography were conducted experimentally. The comparison between the numerical and experimental results showed that the developed model was practically accurate. In addition, the results confirmed that the peak temperature was the dominant factor controlling the grain size and mechanical properties, where the fine grains could be achieved at low rotational speed as well as high traverse speed. Consequently, lower peak temperature leads to the high ultimate tensile strength and hardness and the low elongation values.
Original languageEnglish
JournalInternational Journal of Advanced Manufacturing Technology
Volume77
Issue number9-12
Pages (from-to)1819-1829
ISSN0268-3768
DOIs
Publication statusPublished - 2015

Keywords

  • Copper
  • Friction stir welding
  • Grain size
  • Mechanical properties
  • Thermal model
  • Fracture mechanics
  • Friction
  • Grain size and shape
  • Hardness
  • Tensile strength
  • Tensile testing
  • Thermography (temperature measurement)
  • Tribology
  • Hardness measurement
  • Lower peak temperatures
  • Micro-structural characterization
  • Peak temperatures
  • Ultimate tensile strength
  • Welding parameters
  • Welding

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