Flow behavior and hot workability of FGH4096 superalloys with different initial microstructures by using advanced processing maps

Yongquan Ning, Zekun Yao, Zheng Yang, Hongzhen Guo, Mingwang Fu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

22 Citations (Scopus)

Abstract

The flow behavior and hot workability of FGH4096 superalloys with different initial microstructures are investigated in this paper. The study alloys behave different flow behaviors due to different initial microstructures (hot isostatic pressed (HIPed) and fine grained (FGed) microstructures). At 1050°C, FGed alloy shows higher flow stress than HIPed alloy. At high temperature (1080-1140°C), however, FGed alloy has lower flow stress than HIPed alloy. Meanwhile, the studied alloys have different hot workability. To investigate the hot workability, advanced processing maps are built up and employed to study the workability. In animation map created in this research, the evolution can be classified into three characteristics, viz., (i) mountain formation, (ii) ridge formation, and (iii) instability domain movement. The motion "vector" (from initial point (HIPed) to terminal point (FGed)) is in the directions of falling temperature (TdDownArrow;) and raising strain rate (straightepsilon;dot;ShortUpArrow;), and this "vector" predicts the enhancement of hot workability.
Original languageEnglish
Pages (from-to)91-97
Number of pages7
JournalMaterials Science and Engineering A
Volume531
DOIs
Publication statusPublished - 1 Jan 2012

Keywords

  • Advanced processing maps
  • FGH4096 superalloys
  • Flow behavior
  • Hot workability
  • Microstructure

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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